micro stepping issue

Rick wrote:

Have you checked that the scale is correct and that a g code move of say 10 results in a machine move of 10 units?

No I have not just seen that the axis is vibrating a lot again... So i will check if it is moving of the right distance...

andypugh wrote:

Are you absolutely sure that you are starting the new config and not the old config?

Absolutely sure, I deleted all the configs on this PC except the .stepconf and regenerated everything from this .stepconf...

Based on your previously posted stepconf configuration, a SCALE value of 320 is correct for all axes.

16 microsteps with a leadscrew pitch of 10 rev/mm for X and Y
8 microsteps with a leadscrew pitch of 5 rev/mm for Z
1.8° steppers, 200 steps/rev

Rick wrote:

Have you checked that the scale is correct and that a g code move of say 10 results in a machine move of 10 units?
Machine units can be inch or mm.

Hello Rick, now I just went back this evening to my workshop and it moves as expected i.e. 300mm for 300mm asked for example...

Hi, I had such problem on my new machine also.

The problem of mine was similar to yours - in stepconfig everything works excellent but in excecution program - terrible jerks.
How to fix them:
1. Look temperature of your processor in BIOS. My had 97! degrees because it was very old. I have changed thermal paste and movement become smoother. But jerks still was when I loaded files 3Mb and more.

2. The main problem was in my processor (or video card, I don't know), It have two cores (intel pentium 4 3GHz). I have changed computer to one processor celeron and everything work smoth and fine.

Don't look at good results of latency test, my processor don't suits needs of LPT-port. I also have good moves in stepconfig withard on Hi acceleration but in excecution of program - stalls of stepping motors.