Tweakie,
On the stepper driver the lowest value I can set the microswitches for microstepping is 400....

Or do you mean I should put the microswitches on the stepper to 1600 (200x8) and put "8" in Mach3 Motor tuning?

Or do you mean I should put the microswitches on the stepper to 1600 (200x8) and put "8" in Mach3 Motor tuning?

That is it exactly (sorry for my bad explanation).

Tweakie.

No probs Tweakie!!
Thanks for your help, I'll try it this afternoon

One last thing please:
My PSU is 36V/10A. My motors are rated 3A/425oz and the steppers drivers' are set to 2.84A. One of the microswitches can be set to "Maintain full current in the stop state" or "Automatically reduce current in the stop state". Which position is more adequate to help preventing missing steps, or it just doesn't matter?

Thanks
Cheers
Sono

Ok, so I've

-set the stepper drives' to 1600
-in Mach3 "Motor Tuning" menu, in "Steps per" I put "8" as value
Result: the machines moves to wrong distances.

So I went to "Settings" and let Mach3 calculate "Steps per" and the number it came up with was 400. With this value the machine would measure spot on.

I tried changing the stepper microswitch to 3200 and Mach3 came up with 800 (oh surprise!).
I put the microswitches back to 1600 and 400 in Mach3 and tweaked Velocity and Acceleration a bit.
Final settings in Mach3 are:
"steps per": 400
Velocity: 1500
Acceleration: 200

Now the machine moves like this when activated through the keyboard and after a Feed Rate command of F900:
https://youtu.be/EmLgoyCIOMs

Does that look/sound ok? Any suggestions for improvement?
Thanks
Sono

If it's of any use I tried a few "Verify" commands after several movements on all axis and it always comes up with results in this range:
X= -0.0900
Y= -0.0025
Z= -0.0281

Cheers
Sono

Ok so your 400 steps per is correct (MotorFullStepsPerRev / ScrewPitch) * Microstep gives (200 / 4) * 8 = 50 * 8 = 400

Explain your "verify" commands, please.

Explain your "verify" commands, please.

I just move the machine around using the 3 axis. Then I click on "Verify" in Mach3. Mach3 homes the machine and returns to the position it was and shows those numbers. Hope that explains

Hi Sonolink,

Reduce current in stop state is the usual and recommended setting for stepper drivers.
Your machine looks good and from the very short video sounds good too.
I do not know the purpose of the Verify Position command or what the displayed indication represents.

Tweakie.