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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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docs/FAQ.md
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@@ -262,9 +262,9 @@ around 10000 steps per second. If it is requested to move at a speed
that would require a higher step rate then Marlin will generally just
step as fast as it can. Klipper is able to achieve much higher step
rates, but the stepper motor may not have sufficient torque to move at
a higher speed. So, for a Z axis with a very precise step_distance the
actual obtainable max_z_velocity may be smaller than what is
configured in Marlin.
a higher speed. So, for a Z axis with a high gearing ratio or high
microsteps setting the actual obtainable max_z_velocity may be smaller
than what is configured in Marlin.
### My TMC motor driver turns off in the middle of a print