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stepper: Calculate step_distance from rotation_distance

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Add support for automatically calculating the internal step_distance
from new config parameters - rotation_distance, microsteps,
full_steps_per_rotation, and gear_ratio.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2020-01-05 20:19:43 -05:00
parent 4a41d228eb
commit 7dcc778b6c
11 changed files with 128 additions and 60 deletions
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11
docs/Probe_Calibrate.md
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@ -114,11 +114,12 @@ Recv: // probe accuracy results: maximum 2.519448, minimum 2.506948, range 0.012
Ideally the tool will report an identical maximum and minimum value.
(That is, ideally the probe obtains an identical result on all ten
probes.) However, it's normal for the minimum and maximum values to
differ by one Z step_distance or up to 5 microns (.005mm). The
distance between the minimum and the maximum value is called the
range. So, in the above example, since the printer uses a Z
step_distance of .0125, a range of 0.012500 would be considered
normal.
differ by one Z "step distance" or up to 5 microns (.005mm). A "step
distance" is
`rotation_distance/(full_steps_per_rotation*microsteps)`. The distance
between the minimum and the maximum value is called the range. So, in
the above example, since the printer uses a Z step distance of .0125,
a range of 0.012500 would be considered normal.
If the results of the test show a range value that is greater than 25
microns (.025mm) then the probe does not have sufficient accuracy for