My set up is servos running off of G320's.  When I home it out, it always goes back to the same spot.  When I command a G28 from the program it comes back to within .005 to .010 from the home position.  I am running very slowly cutting air so I don't think it is missing steps due to to much load. 

Questions:

1) Can I home the machine out from the program and reset home position?

2) What does "verify" do.  Can it be commanded from a program.  Will it reset zero position.

3) "G28.1 Z0." does not work like expect.  I would like it to go from where it is at to the z reference switch.  All axis move toward the switches. Do I have the code wrong.

4) How do I start in the middle of the program.  My programs do not have line numbers.  How is it intended to work.  Can I start from a tool number or tool change?

5) Were did the jog indicator go in Mach 3.  I went back to Mach 2 because I couldn't find it.

Any help would be appreciated.

I think the .005 - .010 dif. is coming from backlash. When you home it, it goes till it sees the switch then backs off untill it doesn't. If you tell the machine to go to 0, it is approaching from the opposite direction.

1) I think G28.1 will do this

2) I'm not sure.

3) G53 Z0. is what you want I think.

4) Right beside the stop button on the program run page you should see a line number. This is a DRO. You can type the line number in (click in the box, type the number, hit enter) and click run from here. Even if your program doesn't have line numbers, you can count them or see what line it is on when you stop it. If you want to move it then pick back up on that line, type it in Line number and click run from here.

5) I think you are talking about the MPG screen. Hit your tab key to expand and collapse it.

Brett

Verify will rehome the axis and tell me the amount that the axis is off...

Thanks
Brian