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stepper: Change default max_error from 50us to 25us

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Change the default compression error window (max_error) from 50us to
25us - it's common for stepper motor drivers to have 30us for their
"pwm fixed off time" and it would be good for the steps to be
scheduled within that time.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2016-12-26 13:15:37 -05:00
parent 800d53db6a
commit f46bc0ef04
2 changed files with 6 additions and 7 deletions
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2
klippy/stepper.py
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@ -51,7 +51,7 @@ class PrinterStepper:
self.min_stop_interval = (math.sqrt(3.*inv_max_step_accel + jc**2)
- math.sqrt(inv_max_step_accel + jc**2))
def build_config(self):
max_error = self.config.getfloat('max_error', 0.000050)
max_error = self.config.getfloat('max_error', 0.000025)
step_pin = self.config.get('step_pin')
dir_pin = self.config.get('dir_pin')
min_stop_interval = max(0., self.min_stop_interval - max_error)