Kevin O'Connor 0ca96e543c toolhead: Increase maximum stepper halt velocity ...

Do a better job of calculating the maximum halt velocity for the
stepper motors.  The maximum cornering velocity is related to both the
maximum acceleration and the junction_deviation, so both should be in
the formula.  Tests show that "math.sqrt(8. * self.junction_deviation
* self.max_accel)" very closely fits the maximum on cartesian robots.

This fixes potential "no next step" shutdowns that could occur on
some print moves.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

2017-02-12 17:20:40 -05:00

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