Homemade, cheap, plasma CNC

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04 Jul 2021 20:12 #213714 by rodw
Replied by rodw on topic Homemade, cheap, plasma CNC
I could find the model for mine seeing you have a mill. I spent a lot of time machining the collar around the ball screw nut but found you can buy it premade! The Z axis just bolts to the mounting plate so it is a seperate unit. I made it all from 60mm x 6mm Ally. The torch mount is 60mm x 10mm
See forum.linuxcnc.org/30-cnc-machines/31509...inion-drive?start=30

The following user(s) said Thank You: Joco

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04 Jul 2021 20:31 #213715 by Joco
Replied by Joco on topic Homemade, cheap, plasma CNC
Rod - if you have the model that would be awesome, or even some drawings.

Having both the big knee mill and a cnc'd BF20 I can make a lot of stuff pretty easily. Including curved/contoured shapes.  Heck I even have thread-milling worked out on the cnc.  :-)

Looking at the picks I am pleased to see you found a single rail truck to be sufficient.  That's was one of the ideas that has been bouncing around in recent weeks.

Cheers - James.

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05 Jul 2021 10:19 - 05 Jul 2021 10:24 #213755 by RNJFAB
Replied by RNJFAB on topic Homemade, cheap, plasma CNC
Rod's design is what I will be basing my new design around. I would love to buy one but can't stretch the budget that far. Rods unit is awesome ! very well built and robust.

I'l going to run a set of 12mm linear rails down the sides of my existing unit, then fold up a piece to joint then into the threaded rod. Then I'll run another 12mm linear rail to allow for the floating torch holdeBefore makeing a new mount for the plasma torch. Currently just using a hand torch until I can save up for the machine torch.

so i'l end up with this c-beam
www.makerstore.com.au/product/c-beam/
with these linear rails
www.makerstore.com.au/product/hard-mgn12/
and my existing motor and ball screw to hopefully give me 150mm of torch travel.
 
Last edit: 05 Jul 2021 10:24 by RNJFAB.

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05 Jul 2021 10:47 #213756 by rodw
Replied by rodw on topic Homemade, cheap, plasma CNC
James in AU, just wait until James in NZ tidies my design up :) But please don't publish the model cos I might want to sell the plans one day...

A piece of 40x80x4 RHS from  Action Aluminium near my work is a lot cheaper (and lighter) than the extrusions. Then you can afford the HGR15 rail :)

How much do you value the convenience of extrusions?

My ballscrew is 150mm and gives me 86mm of travel which is enough.
The following user(s) said Thank You: RNJFAB

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05 Jul 2021 11:06 #213757 by RNJFAB
Replied by RNJFAB on topic Homemade, cheap, plasma CNC
Thanks Rod,

I do have to come up this week and grab some more ally for a few jobs so might add a bit extra on for the z axis. I was thinking of recycling what I already had, however it will probably be easier to copy Joco.

I have some 5mm plate lying around so may just start cutting tonight the bits that I can. Or I may just get it all drawn up so I’m right to cut once I have all the bits.

Cheers

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18 Jul 2021 00:16 #215190 by RNJFAB
Replied by RNJFAB on topic Homemade, cheap, plasma CNC
 

 

Hey all, 

first problem I need help with,

I have tried to run some programs with the pierce only option so I can try and save some electrodes and nozzles. 

I get the following error. I’m not sure if it’s a setting I need to fix in sheetcam or if it’s in Linux. any direction appreciated. 
cheers

 
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18 Jul 2021 02:17 #215195 by RNJFAB
Replied by RNJFAB on topic Homemade, cheap, plasma CNC

Attachment not found

Attachment not found

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18 Jul 2021 07:51 #215210 by phillc54
In line 25 you possibly require a G0 at the start of the line.

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18 Jul 2021 09:01 #215211 by RNJFAB
Replied by RNJFAB on topic Homemade, cheap, plasma CNC
Thanks Phill

I can't edit the G code, it changes when I switch from pierce and cut to pierce only.

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18 Jul 2021 09:35 #215214 by phillc54
Can you post the original gcode.

Is this for a PlasmaC config?

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