Messages

31

General Mach Discussion / Re: Z axis cutting too deep

« on: December 18, 2009, 04:39:58 PM »

It's not binding, I just checked. I have run 7 samples and it seems that in all the Z axis has been "stretched" a consistent amount, but the DROs and program limits give the correct amount. At first I thought that the Z axis steps were off, but that isn't it. Sure got me baffled.   Thanks,    Pico

32

General Mach Discussion / Z axis cutting too deep

« on: December 18, 2009, 03:17:48 PM »

My cnc computer has been off for about 1 1/2 months; previously I used it for about 60 hours, spread over 2 weeks with no problem. Recently I have attempted to cut a piece about 2"X4"X.85". The X and Y axis are alright but the Z axis continually cuts too deep. The first several pieces I cut seem to be about 100% too deep - the cut was through the 1 " material, the 3/8" plywood that it was contact cemented to, and into the table about 3/16". Other cuts I made have not been as extreme, the cut this morning maybe 50% too deep. The program limits reads Z range =.85". I don't think the DROs are reading correctly, the tool retract height is +.15 but after it has cut deeply into the material, and the cutter has retracted to +.15, I can look across the top surface of the material and the bottom of the cutter will be beneath it. I checked Ports and Pins-Motor Tuning and the Z axis steps are identical with the X and Y axis. I've looked over this board but can't find a similiar problem. Any idea about how to solve this?    Thanks,   Pico

33

General Mach Discussion / Re: tool change problem - what have I missed?

« on: October 07, 2009, 03:49:50 PM »

Tried it - that works! Thanks,    Pico

34

General Mach Discussion / Re: tool change problem - what have I missed?

« on: October 06, 2009, 08:00:32 PM »

Ray,     Thanks for the reply, I'll try that tomorrow.        Pico

35

General Mach Discussion / tool change problem - what have I missed?

« on: October 06, 2009, 05:39:17 PM »

This is the first time I've tried to change tools and it's not working out well. I have measured the difference between T1 and T2, which is -0.0475" and entered that in G55. I ran T1, manually change to T2, which cuts above where it's supposed to about .05". I have homed both T1 and T2 to G54 G0 X0 Y0 Z0 and G55 Go X0 Y0 Z0 and they both go to the exact same spot. Would someone straighten me out on this?    Thanks,   Pico