Another plasma component...

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26 Aug 2019 16:52 #143232 by sevaz
Replied by sevaz on topic Another plasma component...
Thank you for advice, but Ive tried already some linux dists with recompiled kernels, and still the best latency results I had only on 3.12 - 3. 15 kernels(like Ubuntu 12, debian 7 and etc. )
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27 Aug 2019 00:21 #143262 by phillc54
OK, after that brain fade all the sims are now fixed...

You will need to give the BuildBot time to make the new dist. Check the date/time here
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28 Aug 2019 09:25 #143426 by rodw
Replied by rodw on topic Another plasma component...

phillc54 wrote: My guesses as a non cutter:
Anti Dive should be around 90% - 95%
Void Sense is not working correctly so leave it off.
PID P is basically the reaction speed so probably start at 10 and work your way up.
PID's I & D probably leave at zero.
Height Per Volt only comes into play for on the fly height adjustment and the not working Void Sense. Approx 0.1 for metric or 0.004 for imperial.


Just reporting back this was useful and solved my recent problems. Somehow PID P was set to 25. I have never knowingly touched this value. Setting it back to 10 worked well. I cut a couple of hundred small parts from leftovers and it all went well. I did check the height sensing and it was perfect as well.
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28 Aug 2019 09:28 #143429 by phillc54
Sorry, I think that 25 may have been me...

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28 Aug 2019 09:40 #143431 by Dee436
Replied by Dee436 on topic Another plasma component...
I am also back to good cut quality.
After checking through everything and adding some new consumables my cuts are good with the numbers Phill suggested.
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28 Aug 2019 10:45 #143438 by rodw
Replied by rodw on topic Another plasma component...

phillc54 wrote: Sorry, I think that 25 may have been me...


You will note I politely said somehow, not somebody! :evil:

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28 Aug 2019 14:53 #143447 by JTknives
Is it possible for me to duel boot my cnc PC. I have everything working how I want but would like to try a fresh clean install of Linux and Linux cnc with the new plasmaC.

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28 Aug 2019 15:01 #143448 by tommylight
Linux Mint will do that for you during install and it usually works without any issue, over any other system be it Linux or Windoze.
Debian net install will not do that automagically but there must be a lot of tutorials on the net on how to dual boot with anything.
Please do read carefully what it is recommending to do before pressing next.

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28 Aug 2019 15:27 #143453 by Clive S
Replied by Clive S on topic Another plasma component...

JTknives wrote: Is it possible for me to duel boot my cnc PC. I have everything working how I want but would like to try a fresh clean install of Linux and Linux cnc with the new plasmaC.


Personally I would just swap the HD for a new SSD then if it all goes wrong you can put the old one back in at any time.

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28 Aug 2019 17:17 #143456 by docwelch
Phill,

As you know, I've had to do quite a bit of work to get the Fusion 360 post processor working with PlasmaC. I've really worked on the small hole cutting more than anything. I have now managed to get the post processor to create a lead-in arc from the center of a hole similar to what Hypertherm recommends. I think, based on the plasmac_gcode_arcs.py file you posted in the past, that you could accomplish this same thing (i.e. you have the variables needed for the calculations). If you want to put this into plasmac, I'll share with you the way that I did it.

Here's a small snippet of the code it creates (for reference, the kerf width is 0.043" and the hole size is 0.25"):
N95 G0 X7.623 Y22.902
(SMALL CIRCLE WITH ARC LEAD-IN FROM CENTER POINT AND 4MM OVERCUT WITH TORCH OFF)
N100 X4.994
N105 M3 S1
N110 M67 E3 Q60.
N115 G3 X7.623 I1.314
N120 I-2.629
N125 M62 P3.
N130 X5.124 Y25.527 I-2.629
N135 M63 P3.
N140 M67 E3 Q100.
N145 M5

Steven
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