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Author Topic: Z Axis and machine coords  (Read 2925 times)

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Z Axis and machine coords
« on: November 06, 2017, 01:54:48 AM »
I've hunted high and low for an answer to this.
I'm trying to use scripting to set up floating torch for my plasma (Hypertherm 45) Now the problem I'm having appears to be an odd one. When trying to read the position of the z axis from the machine coords it reads 0 yet the working coords are reading the correct values. The machine works brilliantly but Mach 3 seems to be ignoring the z axis coords
Please help
Many thanks in advance
Rob
Re: Z Axis and machine coords
« Reply #1 on: November 06, 2017, 05:12:32 AM »
Hi,
commonly machine co-ord Z=0 is the very top of the Z axis travel.

You say the work co-ords are working OK. Then the machine co-ords must be working too, the work co-ords are just a numerically shifted copy of the machine
co-ords after all.

Can you explain a bit more about what you see and why you consider it faulty?

Craig
My wife left with my best friend...
     and I miss him!
Re: Z Axis and machine coords
« Reply #2 on: November 06, 2017, 05:37:04 AM »
The X and Y machine coords work faultlessly just dont understand why the Z doesn't do the same. If i go into diags both the user and machine coords work for the XY but not the Z. just the user coords work. If i use scripts they all seem the refer to the machine coords which of course is a problem for me, just want to know why theZ doesn't seem to work the same.
The long and the short is the floating head ineed to put on my plasma and i was just hoping to use the PROBE G31 function alas that doesn't seem to work even if i trigger the probe.
This is my reference....
http://proma-elektronika.com/index.php/en/tips/plasma-detekcja-materialu

I must be missing something as it just doesnt work.

Thanks again for your help
Re: Z Axis and machine coords
« Reply #3 on: November 06, 2017, 05:39:58 AM »
Hi,
do the Z work co-ords go up and own when you jog the Z axis?

Craig
My wife left with my best friend...
     and I miss him!
Re: Z Axis and machine coords
« Reply #4 on: November 06, 2017, 07:11:34 AM »
no, not on the machine coords

Rob
Re: Z Axis and machine coords
« Reply #5 on: November 06, 2017, 08:54:03 AM »
Hi,
what about the Z axis DRO? Does it go up and down as you jog the axis?

If it does then the Z axis machine co-ordinates ARE changing.

Current Position=Machine Co-ordinate - Work Offset

If the Current Position is changing with a fixed Work Offset then the Machine Co-ordinates MUST be changing as well.

Craig
My wife left with my best friend...
     and I miss him!
Re: Z Axis and machine coords
« Reply #6 on: November 06, 2017, 08:59:30 AM »
Hi Craig
I believe they aren't. If i write a script to read in the machine coords for Z i get 0
I'll have a play with some more scripts later and get you an output.

Thanks
Rob
Re: Z Axis and machine coords
« Reply #7 on: November 06, 2017, 09:14:45 AM »
Hi,
does the Z axis DRO change or not?

Craig
My wife left with my best friend...
     and I miss him!
Re: Z Axis and machine coords
« Reply #8 on: November 06, 2017, 09:23:41 AM »
Hi
It changes on the Program Run screen but on the Diags screen it doesn't change on the machine coords like the XY does.
Sorry its a bit difficult to describe.
I'll grab a screen shot in a moment.

Thanks for your patience with this
Rob
Re: Z Axis and machine coords
« Reply #9 on: November 06, 2017, 09:28:54 AM »
Hi,
if the Z axis DRO is changing then the Z axis machine co-ordinates must be changing also.

Craig
My wife left with my best friend...
     and I miss him!