Need Help!- Stepper motors binding up above 35% jog?

[555e]

Just got my table up and moving ,using mach 3 in jog mode above 35% travel speed my steppers like Tye up or sound like there binding up, but below 35 they run great? am i trying to over speed them? any help would be great!

[ger21]

What is the velocity set at, and what kind of drives are you using.

[555e]

I think it said 100 The drivers easycnc board with built in drives,thanks

[ger21]

These?
http://www.easy-cnc.com/products.html

[555e]

Yes the 3 axes

[ger21]

It's probably resonance. If you have double shaft motors, you can make a damper that will eliminate the problem. I made one today and the improvement was night and day.
http://www.cnczone.com/forums/showth...639#post256639

[stevespo]

What are you using for a computer? I was seeing similar behavior with a slow (800MHz) computer and timing issues with the pulse generation (with Mach). Going to a 1.7GHz machine has made a world of difference.

Sounds like it could also could be mid-band resonance. People have had good luck with the dampers, or switching to a driver with resonance suppression.

Details on motors, screws, power supply, etc would be helpful.

Steve

[555e]

The problem was the acceleration was to high slowing it down did the trick it runs like a dream thanks for you guys help. I am using one shaft one motor and two rack pinion for my X using Mach Windows , i am messing with liniux Ubontu EMC