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!

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

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

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

Yes the 3 axes

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/showthread.php?p=256639#post256639

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

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