Need Help!- Motors vibrating machine!

[blake374]

Hello

I just finish building a 4 axis cnc wire cutter. I am using a gecko g540 driver and 4 gecko motors. I am using desk cnc to write the g-code and using mach3 to run the machine.

When I jog the machine using mach 3 I can feel the motors run very smooth. When I run the machine at the same speed (30 ipm) using gcode for some simple flat shapes the motors really get vibrating.

My hotwire is vibrationg when I run the machine and I think it may be originating from the motors. The machine is belt driven with no gear reduction.

I am using a program called doubleCAD to draw and export dxf's.

Anyone have any ideas about settings in mach that might help. I tried putting G64 and G90 at the start of my code and that didn't help.

Is there any CV settings in mach that might help

In general config in mach I see there is some CV settings. Could any of those help?

My CV distance tolerance is set at 180. What does this do?

Thanks

Blake Dextraze

[ger21]

Enabling CV mode (G64), but turning off all the other CV settings should work the best.

It could be that your resolution is too low, though.

[blake374]

Hi Ger

I believe it was in G64 and all the other CV settings are off.

I believe the resolution is set at .01 inch. I am talking with the desk cnc tech support to see if I can change this.

Maybe I need a new CAM program. desk cnc makes it very easy make my 4 axis code.

Maybe I could look into a 2 axis CAM program and slave the other side of my machine using Mach.

[ger21]

I meant the resolution of your motors, with no gear reduction.

[blake374]

Ger

That is an interesting idea. I am at about 600 steps per inch with micro stepping and puellys. If I put a gear reduction on that could it really reduce vibration? I guess I could see how 1200 steps per inch could be smoother than 600.

Blake

[ger21]

600 steps per inch is much finer than I thought. Probably not the problem.