Homemade, cheap, plasma CNC

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10 Mar 2022 19:21 #236880 by snowgoer540
FWIW, this g-code file ran fine on my sim machine (imperial machine though), but without a backup of your config, it's impossible to simulate your machine.

To get a backup of your config, click "BACKUP CONFIG" in the parameters (or settings if your screen is 4:3) tab.  Upload the resulting file here. :)
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11 Mar 2022 23:28 #236966 by RNJFAB
Replied by RNJFAB on topic Homemade, cheap, plasma CNC
 

File Attachment:

File Name: PLASMA_V1....3.tar.gz
File Size:14 KB
Attachments:

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12 Mar 2022 00:01 #236967 by phillc54
I do see the message in your logfiles.
I made a sim of your config and the file runs without issue.

If you jog your Z axis until it gets to the bottom of travel, how far in mm is that below the top of the slats?


 

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12 Mar 2022 02:37 - 12 Mar 2022 02:39 #236976 by RNJFAB
Replied by RNJFAB on topic Homemade, cheap, plasma CNC
5mm

I did some more cutting today, the error pops up when the first cut starts.

also took a short video but can upload it yet.
Last edit: 12 Mar 2022 02:39 by RNJFAB.

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12 Mar 2022 06:07 #236979 by phillc54
I have done a heap of testing and cannot work it out. With the config as you posted, with the safe height at 99mm I only see the warning if the material is around 61mm higher than the top of the slats.

In the most recent post you mention the first cut, does it only happen after the first probe?
 

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12 Mar 2022 13:44 #236995 by tommylight
Check for active offsets, there is a small green ball shape if there are any.

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12 Mar 2022 20:46 #237019 by RNJFAB
Replied by RNJFAB on topic Homemade, cheap, plasma CNC
Thank Phil, 
the error pops up on the first cut for each piece. 

it will only move up 8.4mm above the surface for movements. 

i have tried some older cut files and it for the same thing making me think that I have changed something in linux. 


thanks tommy, 
heading to the shed no to check that. 

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12 Mar 2022 22:26 #237032 by RNJFAB
Replied by RNJFAB on topic Homemade, cheap, plasma CNC
No green ball Tommy.

 

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12 Mar 2022 22:38 #237037 by phillc54
Man, this is strange... Sorry for the pile of questions but I can't really get my head around what is happening.

When you say 8.4mm do you mean when it is moving between cuts?
What is the Safe Height parameter when it does this?
Does changing the Safe Height parameter change thie 8.4mm to something else?
If you do Z axis MDI of say 20mm does it actually move 20mm?
If you set the Safe Height parameter to a low value like 20mm does it still give the warning?
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12 Mar 2022 22:49 #237040 by tommylight

No green ball Tommy.
 

My dog has one ... oh that ball ! :)
Did you zoom in on the 0,0,0 coordinates? It is small, very small.
Also i did check on one of my machines today while i was chasing a gremlin in the electronics, PlasmaC and QtPlasmaC will always have that green ball on all machines with limit switches and proper homing... soooo
Check the G code quick reference for offsets and cancel all of them, there are at least 2, maybe more, then do the "torch just under the slats" exercise again and touch off Z.
I am blindly hoping there is a tool offset active messing things up, otherwise i am out of ideas ... or am i ???
Can you upload a video on youtube with the normal use process, from start to ... when things mess up.
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