Another plasma component...

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7 years 5 months ago #134928 by tommylight

JTknives wrote: .... Turn a body for it and ....

No metal, please! I've already seen one such incident, did not end well !
A costumer of mine has a big workshop and some stainless gathering dust so he thought it would look much nicer than the black plastic. It did look nicer, but it arced somehow inside. Still has it and uses it, after getting some high voltage isolating tape and adding several layers of insulation with it.

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7 years 5 months ago #134933 by JTknives
lol, yeah no steel. I don’t know your customer but I would halfway assume that would be common knowledge.

So another question. Does or can LinuxCNC/plasmaC apply cutter comp. I looked through Sheetcam and did not see any options to turn it on. I would like to beable to adjust offset on the fly so I can fine tune the size of the parts.

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7 years 5 months ago #134939 by tommylight

JTknives wrote: lol, yeah no steel. I don’t know your customer but I would halfway assume that would be common knowledge.

So another question. Does or can LinuxCNC/plasmaC apply cutter comp. I looked through Sheetcam and did not see any options to turn it on. I would like to beable to adjust offset on the fly so I can fine tune the size of the parts.

Sheetcam has it as "kerf" under "tool" i think, it's been to long since i tested it.
Linuxcnc can apply it, granted the tool table is set up, and regardless of the one set in sheetcam. Also JT is doing some nesting magic and if i remember it correctly it also can do that.

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7 years 5 months ago #134941 by JTknives
Yes Sheetcam will shift using curf but it just permanently shifts the cut path. What I want to do is use G41 and G42. This keeps the gcode path right along the part profile. Then LinuxCNC will shift the cut path off the origanial path by the diamater of the tool that you enter.

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7 years 5 months ago - 7 years 5 months ago #134942 by phillc54

JTknives wrote: So another question. Does or can LinuxCNC/plasmaC apply cutter comp. I looked through Sheetcam and did not see any options to turn it on. I would like to beable to adjust offset on the fly so I can fine tune the size of the parts.

Yes you can, this is from the readme:

To use cutter compensation you will need to use G41.1, G42.1 and G40 with the cut file parameter hal pin #<_hal[plasmac_run.kerf-width-f]> like so:
- G41.1 D#<_hal[plasmac_run.kerf-width-f> ; for left of programmed path
- G42.1 D#<_hal[plasmac_run.kerf-width-f> for right of programmed path
- G40 to turn compensation off

This uses kerf width from the selected material.

Cheers, Phill.
Last edit: 7 years 5 months ago by phillc54.

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7 years 5 months ago - 7 years 5 months ago #134951 by rodw
Replied by rodw on topic Another plasma component...
Les from Sheetcam confirmed the other day that Sheetcam itself does not use tool offsets but generates compensated code based on the kerf thickneess you enter into your Sheetcam tool config.

A piece of 35mm or so acetal (which you my know as Delrin in your market) mkaes quite a nice torch body and its not tat expensive.
image missing https://i210.photobucket.com/albums/bb270/rodweb/Lathe/Plasma/DSC_5951_zpslxoefdca.jpg
Last edit: 7 years 5 months ago by rodw.

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