diff --git a/plugins/USBPrinting/avr_isp/intelHex.py b/plugins/USBPrinting/avr_isp/intelHex.py
index 4444006b3d..6e27595587 100644
--- a/plugins/USBPrinting/avr_isp/intelHex.py
+++ b/plugins/USBPrinting/avr_isp/intelHex.py
@@ -5,6 +5,8 @@ See: http://en.wikipedia.org/wiki/Intel_HEX
 This is a python 3 conversion of the code created by David Braam for the Cura project.
 """
 import io
+from UM.Logger import Logger
+
 
 def readHex(filename):
     """
@@ -41,6 +43,6 @@ def readHex(filename):
         elif rec_type == 2:	#Extended Segment Address Record
             extra_addr = int(line[9:13], 16) * 16
         else:
-            print(rec_type, rec_len, addr, check_sum, line)
+            Logger.log("d", "%s, %s, %s, %s, %s", rec_type, rec_len, addr, check_sum, line)
     f.close()
     return data
diff --git a/plugins/USBPrinting/avr_isp/ispBase.py b/plugins/USBPrinting/avr_isp/ispBase.py
index fbd3bf091f..077cfc36e6 100644
--- a/plugins/USBPrinting/avr_isp/ispBase.py
+++ b/plugins/USBPrinting/avr_isp/ispBase.py
@@ -8,6 +8,7 @@ The ISP AVR programmer can load firmware into AVR chips. Which are commonly used
 """
 
 from . import chipDB
+from UM.Logger import Logger
 
 class IspBase():
     """
@@ -22,11 +23,11 @@ class IspBase():
             raise IspError("Chip with signature: " + str(self.getSignature()) + "not found")
         self.chipErase()
         
-        print("Flashing %i bytes" % len(flash_data))
+        Logger.log("d", "Flashing %i bytes", len(flash_data))
         self.writeFlash(flash_data)
-        print("Verifying %i bytes" % len(flash_data))
+        Logger.log("d", "Verifying %i bytes", len(flash_data))
         self.verifyFlash(flash_data)
-        print("Completed")
+        Logger.log("d", "Completed")
 
     def getSignature(self):
         """
diff --git a/plugins/USBPrinting/avr_isp/stk500v2.py b/plugins/USBPrinting/avr_isp/stk500v2.py
index afdb50553e..3bbecb06c2 100644
--- a/plugins/USBPrinting/avr_isp/stk500v2.py
+++ b/plugins/USBPrinting/avr_isp/stk500v2.py
@@ -11,6 +11,7 @@ import time
 from serial import Serial
 from serial import SerialException
 from serial import SerialTimeoutException
+from UM.Logger import Logger
 
 from . import ispBase, intelHex
 
@@ -84,7 +85,7 @@ class Stk500v2(ispBase.IspBase):
         #Set load addr to 0, in case we have more then 64k flash we need to enable the address extension
         page_size = self.chip["pageSize"] * 2
         flash_size = page_size * self.chip["pageCount"]
-        print("Writing flash")
+        Logger.log("d", "Writing flash")
         if flash_size > 0xFFFF:
             self.sendMessage([0x06, 0x80, 0x00, 0x00, 0x00])
         else:
@@ -151,7 +152,6 @@ class Stk500v2(ispBase.IspBase):
                 raise ispBase.IspError("Timeout")
             b = struct.unpack(">B", s)[0]
             checksum ^= b
-            #print(hex(b))
             if state == "Start":
                 if b == 0x1B:
                     state = "GetSeq"
@@ -206,7 +206,7 @@ def main():
     """ Entry point to call the stk500v2 programmer from the commandline. """
     import threading
     if sys.argv[1] == "AUTO":
-        print(portList())
+        Logger.log("d", portList())
         for port in portList():
             threading.Thread(target=runProgrammer, args=(port,sys.argv[2])).start()
             time.sleep(5)