Add SLOWDOWN_DIVISOR

config/default/Configuration_adv.h

@@ -753,8 +753,12 @@
 // Minimum time that a segment needs to take if the buffer is emptied
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
-// If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/3DFabXYZ/Migbot/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/ADIMLab/Gantry v1/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/ADIMLab/Gantry v2/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/AlephObjects/TAZ4/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Alfawise/U20-bltouch/Configuration_adv.h

@@ -755,7 +755,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Alfawise/U20/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/AliExpress/UM2pExt/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Anet/A2/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Anet/A2plus/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Anet/A6/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Anet/A8/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Anet/A8plus/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Anet/E10/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Anet/E16/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/AnyCubic/i3/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/ArmEd/Configuration_adv.h

@@ -758,7 +758,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Artillery/Genius/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Artillery/Sidewinder X1/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/BIBO/TouchX/cyclops/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/BIBO/TouchX/default/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/BQ/Hephestos/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/BQ/Hephestos_2/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/BQ/WITBOX/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/BigTreeTech/SKR Mini E3 1.0/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/BigTreeTech/SKR Mini E3 1.2/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Cartesio/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Creality/CR-10/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Creality/CR-10S/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Creality/CR-10_5S/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Creality/CR-10mini/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Creality/CR-20 Pro/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Creality/CR-20/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Creality/CR-8/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Creality/Ender-2/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Creality/Ender-3/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Creality/Ender-4/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Creality/Ender-5 Pro/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Creality/Ender-5/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Dagoma/Disco Ultimate/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/EXP3D/Imprimante multifonction/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        60000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Einstart-S/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/FYSETC/AIO_II/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/FYSETC/Cheetah 1.2/BLTouch/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/FYSETC/Cheetah 1.2/base/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/FYSETC/Cheetah/BLTouch/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/FYSETC/Cheetah/base/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/FYSETC/F6_13/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/FYSETC/S6/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Felix/DUAL/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Felix/Single/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/FlashForge/CreatorPro/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/FolgerTech/i3-2020/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Formbot/Raptor/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Formbot/T_Rex_3/Configuration_adv.h

@@ -758,7 +758,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/A10/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/A10D/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/A10M/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/A10T/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/A20/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/A20M/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/A20T/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/A30/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/D200/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/Duplicator5/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/E180/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/M201/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/MeCreator2/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/Me_creator/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/Me_ducer/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/PI3A PRO/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/Prusa i3 Pro C/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Geeetech/Prusa i3 Pro W/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/HMS434/Configuration_adv.h

@@ -746,7 +746,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Infitary/i3-M508/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/JGAurora/A1/Configuration_adv.h

@@ -759,7 +759,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/JGAurora/A5/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/JGAurora/A5S/Configuration_adv.h

@@ -759,7 +759,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/JGAurora/Magic/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/MakerFarm/Pegasus_12/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/MakerParts/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Malyan/M150/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Malyan/M200/Configuration_adv.h

@@ -756,7 +756,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Micromake/C1/enhanced/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Mks/Robin/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Mks/Sbase/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Modix/Big60/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/RapideLite/RL200/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Renkforce/RF100/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Renkforce/RF100XL/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Renkforce/RF100v2/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/RigidBot/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/SCARA/MP_SCARA/Configuration_adv.h

@@ -751,7 +751,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
-//#define SLOWDOWN
+//// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
+#define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/SCARA/Morgan/Configuration_adv.h

@@ -751,7 +751,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
-//#define SLOWDOWN
+//// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
+#define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/STM32/Black_STM32F407VET6/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Sanguinololu/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Tevo/Michelangelo/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Tevo/Nereus/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Tevo/Tarantula Pro/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info

config/examples/Tevo/Tornado/V1 (MKS Base)/Configuration_adv.h

@@ -754,7 +754,12 @@
 #define DEFAULT_MINSEGMENTTIME        20000   // (ms)
 
 // If defined the movements slow down when the look ahead buffer is only half full
+// Slow down the machine if the look ahead buffer is (by default) half full.
+// Increase the slowdown divisor for larger buffer sizes.
 #define SLOWDOWN
+#if ENABLED(SLOWDOWN)
+  #define SLOWDOWN_DIVISOR 2
+#endif
 
 // Frequency limit
 // See nophead's blog for more info