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stepper: Default to a high direction pin meaning positive direction

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Invert the default meaning of the stepper direction pin.  Instead of
treating a low value as position motion, treat a high value as
positive motion.  This matches what other firmwares do, and it matches
what common stepper motor drivers document.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2016-11-08 10:39:32 -05:00
parent 5e6127869a
commit afecf7ce36
5 changed files with 14 additions and 14 deletions
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6
klippy/extruder.py
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@@ -97,9 +97,9 @@ class PrinterExtruder:
steps = forward_d * inv_step_dist
step_offset = self.stepper_pos - start_pos * inv_step_dist + 0.5
self.stepper_pos = new_step_pos
sdir = 0
sdir = 1
if steps < 0:
sdir = 1
sdir = 0
steps = -steps
step_offset = 1. - step_offset
mcu_time, so = self.stepper.prep_move(move_time, sdir)
@@ -142,7 +142,7 @@ class PrinterExtruder:
step_offset = start_pos * inv_step_dist - self.stepper_pos + 0.5
self.stepper_pos = new_step_pos
mcu_time, so = self.stepper.prep_move(
move_time+accel_t+cruise_t+decel_t, 1)
move_time+accel_t+cruise_t+decel_t, 0)
move_step_d = retract_d / steps