Homemade, cheap, plasma CNC

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21 Nov 2021 19:29 #227222 by rodw
Replied by rodw on topic Homemade, cheap, plasma CNC


Took some time to stop laughing ! :)


Thats a side affect of having the gene!
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21 Nov 2021 21:43 #227236 by tommylight


Took some time to stop laughing ! :)


Thats a side affect of having the gene!

I thought the chronic sleep deprivation was a side effect! :)

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23 Nov 2021 11:08 #227393 by RNJFAB
Replied by RNJFAB on topic Homemade, cheap, plasma CNC
Thanks Rod,

Toolset moved.

Changed the settings in the PP ass well, however the tool set selected in the PP is the one that QtPlasmaC runs, and i'm unable to change it.

I'll stay tuned to see your PP come through in my e-mail when you get a chance.

Thanks

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12 Dec 2021 12:52 #228917 by RNJFAB
Replied by RNJFAB on topic Homemade, cheap, plasma CNC
new problem just for fun. Any cut files loaded into QtPlasmac get turned 180deg.

Not sure why this has happened. just updated to the latest version and it still does it.

Any ideas?

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12 Dec 2021 14:45 #228922 by snowgoer540
I dont see that here, on either the virtual machine, or my main machine.

But I do have two thoughts:

1. your origin point in the preview should be that Y is pointing up and X is pointing to the right. If not, a rotation probably got set accidentally.  

You could set it back to zero by going to the MDI and entering:
G10 L2 P0 R0

You will have to click RELOAD to see the effect in the graphic preview window if you have g-code loaded.

2. If it's not that, you'll have to post your g-code for one of us to take a look.
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12 Dec 2021 23:03 - 13 Dec 2021 00:31 #228957 by RNJFAB
Replied by RNJFAB on topic Homemade, cheap, plasma CNC
Thanks Snowgoer,

Just the rotation had been changed and i didn't know how it happened or how to get it back.

Did all my cutting last night by redoing the g-code and flipping the cut. Talk about an upside down nightmare !!

thanks again for all the help and behind the scenes work that you guys are doing.
Last edit: 13 Dec 2021 00:31 by RNJFAB.

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27 Dec 2021 05:13 #230041 by RNJFAB
Replied by RNJFAB on topic Homemade, cheap, plasma CNC
So post Christmas update 2021.

TB6600 stepped drivers getting bit funny in the heat of QLD (35+ deg C in the shed with 99.997% humidity).

New z axis has been completed, tested and is working - pictures to follow shortly. New torch also added to make life easier. 160mm travel.

New laser is in and linked to a button in the GUI. Offset all worked in to zero off laser point. Offset also worked out for framing as part of QtPlasmaC.

Still haven't worked out spotting in Sheetcam, or how to se the tool from QtPlasmaC instead of Sheetcam. Must need to watch more video's.

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27 Dec 2021 05:19 #230042 by RNJFAB
Replied by RNJFAB on topic Homemade, cheap, plasma CNC
    
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27 Dec 2021 05:25 - 27 Dec 2021 05:36 #230043 by RNJFAB
Replied by RNJFAB on topic Homemade, cheap, plasma CNC
Here you can see some of the buttons that I have set. These just make my life easier in the way that I use my CNC. 

Add Sheet - moves plasma to the back left to allow me to load a new sheet of material. 
Change Consumable - Moves plasma to middle of bed right at the front to allow me to change consumables. 
Go To Zero - Go to where the machine has been zeroed
Zero On Laser - zero on the laser pointer (still not working 100% of the time - if a job I loaded it doesn't work correctly)
Laser - Toggle the laser pointer on/off
Water Bed - timed button to fill the water table. ensuring the table doesn't overflow. and making sure I don't forget to turn the pump off.
Cooling Fans - turn the fans on in the control box. 
Lights - Turn on lights around machine to help me see (not fully hooked up yet)
Box Lights - Turn on lights in control box (not fully hooked up yet)

 
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Last edit: 27 Dec 2021 05:36 by RNJFAB.

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27 Dec 2021 05:43 #230044 by rodw
Replied by rodw on topic Homemade, cheap, plasma CNC

So post Christmas update 2021.

Still haven't worked out spotting in Sheetcam, or how to se the tool from QtPlasmaC instead of Sheetcam. Must need to watch more video's.

 

The original plasmac post for sheetcam required a seperate tool defined called "Centre Spot"
You then did a seperate drill operation using that tool.
This required you to move the holes you wanted to spot to a new layer.
The default sheetcam post just needs a drill operation with any tool. 
Thats about it.

In the gui, set the spotting threshold for 10 volts and start the delay at 0.5 seconds.
What should happen is plasmac will see the voltage threshold exceeded. Then it will wait for 0.5 seconds or whatever you set and turn the torch off before you get an ArcOK.
This should result in a finer spot than would normally be achieved.
The time delay is very machine dependent. If it does not work for you (eg torch does not turn on), try extending the time delay.

The reason why we wait until a voltage is seen is that different plasmas and relays have different lag times from the time the torch is activated so it allows for this.
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