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Author Topic: Motor Tuning and Setup A-Axis  (Read 3069 times)

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Motor Tuning and Setup A-Axis
« on: December 02, 2015, 01:11:05 PM »
Hello All,

I have just received a new Rotary Axis for my DIY built CNC router.  I am needing help with the motor tuning setting for Mach3 for it.

I need:
Steps per:
Step Pulse:
Dir Pulse:

Here are the specs:
Rotational Axis:

With K12 100MM 4 Jaw Centring Chuck
Center height:65MM
Total height:115MM
Motor:Nema23 2-phase 57 stepper motor
Motor Electric current:3A
Motor Voltage:3V
Motor Holding Torque: 1.35N/M
Step Angle: 0.3degree/step
Reducing ratio:6:1(Timing belt deceleration mode)
Synchronous belt:3M

Thanks in advance,

Offline RICH

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Re: Motor Tuning and Setup A-Axis
« Reply #1 on: December 03, 2015, 06:16:54 AM »
Use the step calculator in Members Doc's to find the steps per unit which is in degrees. Here is the link:


Velocity, acceleration is by trial and error. start low and work your way up until it skips and then reduce by approx. 30%.
See the drive manual for recommended step and direction pulse settings.

You can use the axis calibration feature , Settings ALt 6 tab lower left corner of the screen, to check the steps per unit.


Re: Motor Tuning and Setup A-Axis
« Reply #2 on: December 04, 2015, 09:21:50 PM »
Hey Rich,
Thank you soon much.

The spreadsheet was awesome!

With a little tweaking on the machine after calculation, worked like a charm!

This forum is great, thanks again.