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Parameters

• Snnn (optional) Spindle index, defaults to 0. Duet 2 supports 4 spindles max
• Pfff:rrr Logical pin numbers used to drive the spindle motor in clockwise and counterclockwise directions. Omit the ":rrr" part if the spindle turns clockwise only. (Not supported in RRF3, see notes)
• In Invert (I1) or don't invert (I0, default) the output polarity. (Not supported in RRF3, see notes)
• Rnnn Spindle RPM that is achieved at full PWM. Used to convert the S parameter in M3 and M4 commands to a PWM value.
• Fnnn (optional) The PWM frequency to use
• Tnnn (optional) Assign spindle to a tool allowing better control in DWC

Example

• M453 P2 R5000 ; switch to CNC mode using heater 2 (E1 heater) pins to control the spindle motor

Switches to CNC mode. In this mode M3/M4/M5 control the pins defined for the milling device. By default, no output is assigned to the spindle motor. Logical pin numbers for the P parameters are as defined for the M42 and M208 commands. If you wish to assign a heater or fan output to control the spindle motor as in the above example, you must first disable the corresponding heater (see M307) or fan (see M106).

Parameters

• Snnn (optional) Spindle index, defaults to 0. Duet 2 supports 4 spindles max
• C"fff+rrr" Names of the ports used to drive the spindle motor in clockwise and counterclockwise directions. Omit the "+rrr" part if the spindle turns clockwise only.
• Rnnn Spindle RPM that is achieved at full PWM. Used to convert the S parameter in M3 and M4 commands to a PWM value.
• Fnnn (optional) The PWM frequency to use
• Tnnn (optional) Assign spindle to a tool allowing better control in DWC

Example:

M453 C"exp.heater3+exp.heater4" F100 ; spindle forward/reverse on heater 3&4 pins, PWM frequency 100Hz

Parameters

• Snnn (optional) Spindle index, defaults to 0. Duet 2 supports 4 spindles max
• C"aaa+bbb+ccc" Names of the ports used to drive the spindle motor. "aaa" is the PWM port used to control the speed. "bbb" (optional)is the digital port used to turn the spindle motor on. "ccc" (optional) is the name of the port used to command reverse instead of forward spindle rotation.

• Rbbbor Raaa:bbb (optional) RPM values that are achieved at zero PWM and at maximum RPM. Used to convert the S parameter in M3 and M4 commands to a PWM value.
• Qnnn (optional) The PWM frequency to use
• Tnnn (optional) Assign spindle to a tool allowing better control in DWC

Example:

M453 C"exp.heater3+exp.heater4+exp.heater5" Q100 ; spindle PWM on heater 3 pin, on/off on heater 4, reverse/forward on heater 5, PWM frequency 100Hz

Parameters

none

Switches to CNC mode. All other parameters have been removed and moved into M950.

Example:

Old code

M453 S0 T1 C"!exp.heater3" R12000 ; Assign tool 1 to spindle index 0, with PWM pin on heater 3 and 12000 RPM achieved at full PWM

New code

M950 R0 C"!exp.heater3" L12000 ; Create spindle index 0, with PWM pin on heater 3 and 12000 RPM achieved at full PWM
M563 P1 S"Spindle 1" R0 ; Create tool 1 with spindle 0 and call it "Spindle 1"