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Rotary plugin torch height

Posted: Sun Jun 06, 2021 12:48 pm
by bobcoder
Hi Les/All
I'm having a wierd problem where when i set Z zero the torch lifts up and the torch is cutting air. It seems to be raising half the thickness of the box section - not wall thickness.

P.S. Using PlasmaRotary Mach3 and it is edited according to my machine and Mach 3

Please help
Rob

Re: Rotary plugin torch height

Posted: Sun Jun 06, 2021 6:06 pm
by djreiswig
I think z zero is supposed to be the center of the tube, not the surface.

Re: Rotary plugin torch height

Posted: Sun Jun 06, 2021 9:33 pm
by bobcoder
Hi
Yes I understand that but when you want to zero the machine you get a torch crash as it tries to plunge to zero. Or am I missing something 🤔

Rob

Re: Rotary plugin torch height

Posted: Mon Jun 07, 2021 1:21 am
by djreiswig
Sorry, I'm not sure what else it could be. I haven't used the rotary plugin yet. I'm sure Les will be along shortly to assist.

Re: Rotary plugin torch height

Posted: Mon Jun 07, 2021 8:42 pm
by FabLab
I was having the same issue..
Check this link
viewtopic.php?f=2&t=8580

The latest PP that I uploaded works for me and is based off of a Mach 3 PP

Re: Rotary plugin torch height

Posted: Mon Jun 07, 2021 9:06 pm
by Les Newell
bobcoder wrote: ↑Sun Jun 06, 2021 9:33 pm Yes I understand that but when you want to zero the machine you get a torch crash as it tries to plunge to zero. Or am I missing something 🤔
When exactly does it crash? The post should not try to plunge to zero.

Re: Rotary plugin torch height

Posted: Tue Jun 15, 2021 6:22 pm
by bobcoder
Hi Les
I think I made a mistake by making my ref 0 for z at the top. Does that make sense?
Should I have the limit/home be at the top of z or the bottom?
So confused as the gcode also has a G28.1 in there is this correct?

Sorry to sound so dumb. I haven't had any problems with sheetcam on my 8x4 plasma. Just sayin
Rob

Re: Rotary plugin torch height

Posted: Wed Jun 16, 2021 1:00 pm
by Les Newell
bobcoder wrote: ↑Tue Jun 15, 2021 6:22 pm I think I made a mistake by making my ref 0 for z at the top. Does that make sense?
Yes, for rotary cutting, Z0 is the center line of the tube. If you have a touch-off switch and the post is configured correctly (see below) this should be automatic.
Should I have the limit/home be at the top of z or the bottom?
There are two ways you can set up your machine:
  • touch-off uses home input. This has the advantage of using one less input but you can't use soft limits. In your post set refHome=true. Thsi will touch off using G31.
  • Home switch at the top of travel and touch-off uses the probe input. In your post set refHome=false. This will touch off using G38.1
In my personal opinion the second way is the best as you can use soft limits. However others would disagree :-)