Hi,

I would really appreciate some help with jerky motion on my milling machine.

I've read many post and tried lots of different options and I still have the problem.

So, if I hold the arrow keys down, then motion is smooth but after 5-10s movement stop (i am still holding the arrow key down) and after 1s the movement continues and then again stop.
If I push the RefAllHome button then the motion is smooth (this I find odd).
Motion with virtual mpg is smooth.

When i say to command for example : G01X-50, G00X-50 the movement is divided into several parts and movement is not smooth, this applies to all axies.
I tried to change the acceleration and velocity but nothing happend.
Also if I type:
G64
G00X-50 (in mm)
then then the motion is jerky/divided to more motions.

I use DB25 parraler breakout board, win XP, Nema34 12N.m and drivers - DQ860MA

Thank you for all the advice