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Author Topic: Physical buttons for plasma  (Read 88393 times)

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Offline Hood

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Re: Physical buttons for plasma
« Reply #460 on: November 28, 2016, 12:36:03 PM »
If you don't adhere to the motor tuning, won't it just fault out the servo drive anyway? If not, crank up the motor tuning!


Mike

I think it is because the movements during THC are small that the infinite accel doesn't affect it too badly where as cranking the accel up in motor tuning would affect all motion.

Anyway looked at the pulleys today and they were both bored out to 8mm so it was a relatively easy swap, had to machine a plate that held the motor on a wee bit but that was all.
After re-tuning the motor it seemed to be fine at the previous settings which I was quite surprised at as it is a tiny servo  and I was basically quartering the available torque compared to previously.
Here are a couple of vids, first is it cutting and as hopefully can be seen the pulley is not moving nearly so much now and thus the motor as well. The second is a view of the THC control panel and Mach itself, you can just about see the arrows for up/dn changing but the camera is not the best :D

https://www.youtube.com/watch?v=EmYRA_cd-0o

https://www.youtube.com/watch?v=Vh6rrtxSTpY
Re: Physical buttons for plasma
« Reply #461 on: November 28, 2016, 01:06:52 PM »
Looks like you are making progress.

Mike
We never have the time or money to do it right the first time, but we somehow manage to do it twice and then spend the money to get it right.

Offline Hood

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Re: Physical buttons for plasma
« Reply #462 on: November 28, 2016, 01:09:38 PM »
Yes, big difference on all fronts from my initial failures :D

Still have to get this better but the biggy is getting the M31 macro to work correctly every time, it is still dodgy, probably something to do with my VB skills but also I am thinking maybe the wee computer. Just building and setting up another at the moment so hopefully will get a chance to test that theory out tomorrow.

Offline Davek0974

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Re: Physical buttons for plasma
« Reply #463 on: November 28, 2016, 01:37:40 PM »
Looking good :)
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Hood

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Re: Physical buttons for plasma
« Reply #464 on: November 28, 2016, 04:40:03 PM »
Also found the square edge the opposite side this time :D
Looked at the swirl ring and it can fit either way so I will have to take a note and make sure I replace the same direction :D

Offline Hood

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Re: Physical buttons for plasma
« Reply #465 on: November 29, 2016, 05:40:16 AM »
THC working exactly as it should thanks to info received from a guy called Ian who knows one or two things about Plasma :)

THC Speed % was the answer, turning it down to 50% seemed the best for my servo.
Here is a vid of it cutting 10mm steel plate, 200mm x 10mm at a rate of 800mm/min.

https://www.youtube.com/watch?v=TU2Ftfxosww

Here is it doing the same but with the plate raised at about 3 degress so that it raises 10mm over the 200mm cut length.

https://www.youtube.com/watch?v=8efACIOWgPA


So big thanks to Ian :)

Now I just have to get the better of the M31 macro issue.
Hood

Offline Davek0974

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Re: Physical buttons for plasma
« Reply #466 on: November 29, 2016, 06:23:59 AM »
Very nice, I think my one is at about 20% but it does make a massive difference

:)
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Hood

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Re: Physical buttons for plasma
« Reply #467 on: November 29, 2016, 07:17:38 AM »
Happy with the cuts now as well, here is the 10mm steel I was cutting in the above vids.
Only problem is I have chopped up a load of material decent getting it to this stage :D

Offline Davek0974

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Re: Physical buttons for plasma
« Reply #468 on: November 29, 2016, 08:01:16 AM »
I know the feeling with the waste, I chewed through a heap of metal and consumables on my learning curve, no way round it really, comes to a stage where you just have to push the start button and see what happens :)

I can usually get a new material/thickness dialled in with one or two straight cuts now.
Bridgeport Mill, Mach3 V062, CSMIO-IP/A controller, AC Servo Drives

Offline Hood

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Re: Physical buttons for plasma
« Reply #469 on: November 29, 2016, 08:13:25 AM »
Yes that will be something I will have to learn, get a notebok and write down what I find best.
Good thing about the miniTHC is the pot on it can easily be adjusted on the fly to increase/decrease the voltage.
How do you set your voltage, via the S word in your code?