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extruder: Add some additional comments 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2016-07-26 11:14:15 -04:00
parent a17229a4c1
commit 170389ef14
1 changed files with 3 additions and 0 deletions
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klippy/extruder.py
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@ -50,16 +50,19 @@ class PrinterExtruder:
decel_v -= extra_decel_v decel_v -= extra_decel_v
end_v -= extra_decel_v end_v -= extra_decel_v
if decel_v <= 0.: if decel_v <= 0.:
# The entire decel phase is replaced with retraction
retract_t = decel_t retract_t = decel_t
retract_d = -(end_v + decel_v) * 0.5 * decel_t retract_d = -(end_v + decel_v) * 0.5 * decel_t
retract_v = -decel_v retract_v = -decel_v
decel_t = decel_d = 0. decel_t = decel_d = 0.
elif end_v < 0.: elif end_v < 0.:
# Split decel phase into decel and retraction
retract_t = -end_v * inv_accel retract_t = -end_v * inv_accel
retract_d = -end_v * 0.5 * retract_t retract_d = -end_v * 0.5 * retract_t
decel_t -= retract_t decel_t -= retract_t
decel_d = decel_v * 0.5 * decel_t decel_d = decel_v * 0.5 * decel_t
else: else:
# There is still only a decel phase (no retraction)
decel_d -= extra_decel_d decel_d -= extra_decel_d
# Determine regular steps # Determine regular steps