Drill dimple issue
02 Jul 2022 02:05 #246414
by phillc54
Replied by phillc54 on topic Drill dimple issue
No worries Keith.
Did you ever try out the idea of having a mechanical probe offset from the torch?
Did you ever try out the idea of having a mechanical probe offset from the torch?
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02 Jul 2022 02:27 #246415
by beefy
Replied by beefy on topic Drill dimple issue
Nah Phill, I got sidetracked with multiple other things - rope access techniques (and I'm shit scared of heights), fishing, then got a fishing boat, ice skating, family, etc.
My workshop got into a very neglected and disorganised state as a result, and I'm now trying to mend my ways and get back into CNC, etc.
My workshop got into a very neglected and disorganised state as a result, and I'm now trying to mend my ways and get back into CNC, etc.
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02 Jul 2022 02:34 #246416
by phillc54
Replied by phillc54 on topic Drill dimple issue
Fair enough, life does tend to get in the way sometimes.
If you do get around to it the basics are now built-in.
linuxcnc.org/docs/devel/html/plasma/qtpl...ml#qt_offset_probing
![:) :)](/media/kunena/emoticons/smile.png)
If you do get around to it the basics are now built-in.
linuxcnc.org/docs/devel/html/plasma/qtpl...ml#qt_offset_probing
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02 Jul 2022 02:48 #246417
by beefy
Replied by beefy on topic Drill dimple issue
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02 Jul 2022 03:14 #246419
by beefy
Replied by beefy on topic Drill dimple issue
Just had a quick read. So let's say if I have a stiff bent wire probe that is mechanically moved directly under the torch, the torch will have to be higher up to allow that, and thus I've got a Z-offset.
If I've got this right this "Z offset" is the:
Ohmic Offset in the PROBING frame of the CONFIGURATION section of the PARAMETERS Tab
Is that correct ?
If I've got this right this "Z offset" is the:
Ohmic Offset in the PROBING frame of the CONFIGURATION section of the PARAMETERS Tab
Is that correct ?
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02 Jul 2022 03:21 #246420
by phillc54
Replied by phillc54 on topic Drill dimple issue
Correct, if you use the ohmic input as the input for this probe.
Theoretically you could use the float input for this probe but I think it is always best to keep the float as a failsafe.
Theoretically you could use the float input for this probe but I think it is always best to keep the float as a failsafe.
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02 Jul 2022 03:25 - 02 Jul 2022 03:26 #246421
by beefy
Replied by beefy on topic Drill dimple issue
Cheers Phill, Qtplasmac just keeps getting better.
I gotta ask. How much time do you think you've put into Qtplasmac/Plasmac since you started it.
I gotta ask. How much time do you think you've put into Qtplasmac/Plasmac since you started it.
Last edit: 02 Jul 2022 03:26 by beefy.
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02 Jul 2022 08:27 - 02 Jul 2022 09:02 #246423
by phillc54
Replied by phillc54 on topic Drill dimple issue
Last edit: 02 Jul 2022 09:02 by phillc54.
The following user(s) said Thank You: snowgoer540
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02 Jul 2022 09:19 #246426
by tommylight
Replied by tommylight on topic Drill dimple issue
Plasma cutters use timers, most of them using an R/C timer that is not precise. That makes getting consistent dimples very hard.
Some stuff that helps avoiding "craters" as Phill so nicely said, is to lewer the air pressure as low as it can go without missfiring, setting the pierce height as high as it can go without missfiring, doing some test to see how long it takes from when the torch is on till it fires with and without air fllow, using low current, using bigger sized nozzles, using new nozzles and electrodes as the black stuff on them messes the arc start.
Some stuff that helps avoiding "craters" as Phill so nicely said, is to lewer the air pressure as low as it can go without missfiring, setting the pierce height as high as it can go without missfiring, doing some test to see how long it takes from when the torch is on till it fires with and without air fllow, using low current, using bigger sized nozzles, using new nozzles and electrodes as the black stuff on them messes the arc start.
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02 Jul 2022 22:57 #246476
by beefy
A few years ago I got a kidney stone and I was off work for 5 weeks. I made a heap of progress designing/programming my torch height control in that time. I could literally go all day long writing/debugging code (takes longer when you're a beginner), testing physical signals, etc. It was a journey I enjoyed.
Since working a 9-5 I make very little progress with such stuff, and I always think how wonderful it would be to be retired so I had the time for such things. Hard to get into that "Zen" state when you only have an hour or two here and there, and you are knackered after work.
Replied by beefy on topic Drill dimple issue
Ah OK, so there's two heroes. Fantastic work guys.I have not kept track but it has been my "job" since I retired.
A few years ago I got a kidney stone and I was off work for 5 weeks. I made a heap of progress designing/programming my torch height control in that time. I could literally go all day long writing/debugging code (takes longer when you're a beginner), testing physical signals, etc. It was a journey I enjoyed.
Since working a 9-5 I make very little progress with such stuff, and I always think how wonderful it would be to be retired so I had the time for such things. Hard to get into that "Zen" state when you only have an hour or two here and there, and you are knackered after work.
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