Spindle-Pitch

Hi @All, I need to change the spindle pitch in my machine and do not want to do this via the STEPCONF Wizard since otherwise all my adjustments are gone. Can someone write me how I can change this manually? (I think this must be in mymachine.ini)
(Google-Translation )

Regards Fritz

Als eine gute maßnahme

Always include your .ini and .hal files so you can get easier help.

Hi Tecno, thanks for the Info

here they are

Hi Andy, thanks for your reply.
i mean the LeadScrew in German: Trapezgewindespindel.
I have a TR12x3 and mean that this is only 12x2.9 or 12x2.8.
When I measure with the dial gauge, so 3mm, then I am at 2.9mm.
So would like to try a few things, but would not want to destroy my configuration.
But I could also configure a new machine to test, which should have the same effect.

Assuming it is the Z axis you need to change. Open up your .ini file and find this block


Then change this line which is the number of steps per mm. eg. the number of stepper pulses to move your axis by 1.0mm. You must allow for any gearing and microstepping

Thank you rodw and andy for reply,
well the trapezoid thread spindle is not as precise as a ball screw, so i think der must be an error.
A few weeks ago a shaft coupling is broken, now i changed all couplings from cheap to a "little higer prized" one.
That makes a lot of positiv different to the machine, it runs smoother, anyway...
I got also a " Antibacklashnut " (poormans solution = Feather an and a second Nut)


The topic of lossing steps I've already thought, only the problem is how do I notice this?
Must i hear or see it?

For Example:

When I make a wooden box with finger tenons, the tenons are mostly 2/10 larger and the counterpart 2/10 smaller.
For a TR Leadscrew i think tjhis is not bad

I hope it is not too confused for you

regards Fritz