PlasmaC torch starting problem (Solved with help from the famous three)
19 Mar 2020 22:47 #160784
by Clive S
Phil thanks.
which signal should I change to 1ms or 5ms or are you asking for the Hoz display set from 200ms to 5ms
Replied by Clive S on topic PlasmaC torch starting problem
From all these plots it seems to me that PlasmaC is doing what it should do.
My take is that the fails are reading the pilot arc and not the cutting arc.
It is interesting that the first cut is always good and the waveforms do show that.
From the plot below it looks to me like the voltage drops off before the arc ok and the torch on which would be correct behaviour on PlasmaC's part but it would be nice to confirm that with say a 1ms or 5ms division.
Warning: Spoiler!
Phil thanks.
which signal should I change to 1ms or 5ms or are you asking for the Hoz display set from 200ms to 5ms
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20 Mar 2020 01:23 #160819
by tommylight
Replied by tommylight on topic PlasmaC torch starting problem
Clive, i am sorry for the mess we have created for you, and also sorry for having to ask you this, but several posts back i asked you to check the torch distance from the material after the first and the second probe, now Rod has mentioned the same thing, so please do check that.
Now on these plots it is clearly visible what is going on, and i have to agree with Phill's conclusion that PlasmaC is working properly and doing everything it should do.
So to recap:
-Please do not lower the low voltage threshold ever again, it did cause us some head scratching, and some stray answers .....,
-PlasmaC is configured and working correctly,
-Wiring is all good,
-The noise is present while the inverter power stage is on, so nothing to worry about, most probably,
-Please oh please lower the pierce height and the cut height !
Pierce at 2mm and cut to 1mm, test and report back
P.S.
If you can find a reed relay, you can get the arcok signal that never fails and gives no false starts ever, but you do have to remove one of the thick cables on the plasma and replace it with a longer one, with 3 turns made out of it and the reed relay located inside those turns. Use a piece of old pen or similar to prevent the reed relay from braking, they usually are made out of thin glass.
Now on these plots it is clearly visible what is going on, and i have to agree with Phill's conclusion that PlasmaC is working properly and doing everything it should do.
So to recap:
-Please do not lower the low voltage threshold ever again, it did cause us some head scratching, and some stray answers .....,
-PlasmaC is configured and working correctly,
-Wiring is all good,
-The noise is present while the inverter power stage is on, so nothing to worry about, most probably,
-Please oh please lower the pierce height and the cut height !
Pierce at 2mm and cut to 1mm, test and report back
P.S.
If you can find a reed relay, you can get the arcok signal that never fails and gives no false starts ever, but you do have to remove one of the thick cables on the plasma and replace it with a longer one, with 3 turns made out of it and the reed relay located inside those turns. Use a piece of old pen or similar to prevent the reed relay from braking, they usually are made out of thin glass.
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20 Mar 2020 10:14 #160846
by Clive S
fail 5ms
.
End trace 5ms
.
start trace 5ms
.
full trace 200ms
Replied by Clive S on topic PlasmaC torch starting problem
.
Yes, the horizontal thanks Clive so I can better see the timing of those signals.which signal should I change to 1ms or 5ms or are you asking for the Hoz display set from 200ms to 5ms
fail 5ms
.
End trace 5ms
.
start trace 5ms
.
full trace 200ms
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