Plasma table set, fine tuning a problem
- aikiaviator
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17 Mar 2026 13:40 - 17 Mar 2026 13:41 #344407
by aikiaviator
Plasma table set, fine tuning a problem was created by aikiaviator
Hi all, Firstly great crowd. Love your work.Ok so I have bult a table. Setup is as follows: 1.2mx1.2m cutting capability. Mesa 7i96 card. THCAD2 THC, Unimig Razorcut45 CNC enabled cutter.X Y, Y1, Z config. I have set the THCAD2 to 1:1 10v High status, and the Unimig at a 30:1 ratio, which should produce a roughly 5V at top end signal. I do not have any resistors in the mix.I have the cutter running but only WITHOUT THC. It cuts, BUT it does not do this nicely and I do not know how to best tune the system. I started on 5mm steel. (probably a little ambitious.). And I dont have enough knowledge on how to set the speeds, heights etc.. to get a clean cut before THC. Then I will need to solve THC. But thought best to get basic answer on settings for the 5mm first then the THC. So settings are as per the images below. I have not performed any other settings other than servo setups and max speeds. Unimig fires off, so Arc on/off work. Arc OK seems to be ok as when has no steel, it shuts off. THC yet to get working.
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Last edit: 17 Mar 2026 13:41 by aikiaviator.
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- tommylight
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17 Mar 2026 14:18 #344410
by tommylight
Replied by tommylight on topic Plasma table set, fine tuning a problem
-Set up the THC, any fine tuning without it is useless when THC is active
-25A for 5mm thick is way to low, roughly 10A/mm is OK
-with working THC, you need to fine tune air pressure (exclusively while the air is ON), voltage=cut height, feed rate
-cut quality will vary based on air moisture, material being cut, nozzle type and wear, so use new nozzle for fine tuning and after you have things working properly
-25A for 5mm thick is way to low, roughly 10A/mm is OK
-with working THC, you need to fine tune air pressure (exclusively while the air is ON), voltage=cut height, feed rate
-cut quality will vary based on air moisture, material being cut, nozzle type and wear, so use new nozzle for fine tuning and after you have things working properly
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