Messages

1

General Mach Discussion / Re: 4th axis toolpath wanders

« on: April 17, 2011, 03:49:45 PM »

Pulse duration from 2 to 5, not direction.  Stupid iPhone autocorrect

2

General Mach Discussion / Re: 4th axis toolpath wanders

« on: April 17, 2011, 02:54:48 PM »

Got it.  Did a simple test, 3 horizontal lines running along x-axis with some up/ down zig-zags. Corner to corner.  Simple code and it works perfect, lines end up going to corners and not outside horizontals.  Did some more searching and figured losing steps due to complexity of cutting characters (20,000+ lines of code).  Changed step/dir pulse direction in motor tuning from 2 to 5 and boom, letters engrave in straight line now and don't start overwriting.  Man, CNC tweaking is a PAI sometime, been battling this for several weeks now.
Cadwiz

3

General Mach Discussion / Re: 4th axis toolpath wanders

« on: April 09, 2011, 08:59:57 PM »

No, slow is not the problem,  I can live with slow relative to other axis movements.  This problems is it doesn't engrave in a straight line relative  to long (x) axis.  It starts a line of text crooked then the line below starts writing in the wong place, oftentimes overwriting due to crookedness of line above.  Seems like the stepper is slipping losing steps as it rotates.  Slowing down doesn't help , I thought slower speed would improve torque and eliminate slippage, wrong?

4

General Mach Discussion / 4th axis toolpath wanders

« on: April 09, 2011, 04:21:06 PM »

Can somebody help me understand.  Got a 4th axis setup and all I've seen is adjust motor calibration to whatever you can can stand.  What does this mean?  I put a part in and try to cut and the tool path wanders around no matter what the motor settings are for a-axis.  What do I have to do to tune 4th axis?