delta: Support limiting the maximum velocity of z moves
On a delta printer, z moves require the mcu to support the greatest number of steps per second. However, z moves are rare, so it makes sense to limit the velocity of z moves separately from the velocity of normal xy moves. Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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@ -79,8 +79,13 @@ pin_map: arduino
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[printer]
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kinematics: delta
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# This option must be "delta" for linear delta printers
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max_velocity: 200
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max_velocity: 300
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max_accel: 3000
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max_z_velocity: 200
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# For delta printers this limits the maximum velocity (in mm/s) of
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# moves with z axis movement. This setting can be used to reduce the
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# maximum speed of up/down moves (which require a higher step rate
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# than other moves on a delta printer).
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delta_arm_length: 333.0
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# Length (in mm) of the diagonal rods that connect the linear axes
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# to the print head
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@ -14,6 +14,7 @@ class DeltaKinematics:
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printer, config.getsection('stepper_' + n), n)
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for n in ['a', 'b', 'c']]
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self.need_motor_enable = True
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self.max_z_velocity = config.getfloat('max_z_velocity', 9999999.9)
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radius = config.getfloat('delta_radius')
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arm_length = config.getfloat('delta_arm_length')
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self.arm_length2 = arm_length**2
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@ -122,6 +123,8 @@ class DeltaKinematics:
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if end_pos[2] > self.limit_z:
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if end_pos[2] > self.max_z or xy2 > (self.max_z - end_pos[2])**2:
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raise homing.EndstopMoveError(end_pos)
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if move.axes_d[2]:
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move.limit_speed(self.max_z_velocity, 9999999.9)
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def move_z(self, move_time, move):
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if not move.axes_d[2]:
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return
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