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In this video, I summarized quickly all the tricks and tips that I did to make my cheap plasma cutter cut50P (P for “pilot arc”) works perfectly with my home-built CNC plasma cutting table.
– 1st tip: Use bigger torch that was designed for higher current. That way the nozzle and the electrode will last longer and the cut quality will be more consistent.
– 2nd tip: Connect the trigger wire directly from the connector on the plasma cutter to the relay and keep it far away from the pilot arc wire and the the air hose to avoid HF noises and interference.
– 3rd tip: If your arc is sputtering, the plasma cutter doesn’t cut continuously, you will have to check inside the plasma cutter and adjust the spark gap. Keep it at reasonable distance (0.8mm following the manufacture manual).
– 4th tip: use 220V instead of 110V. 220V will make the arc more stable and also the plasma cutter will have higher duty cycle when cutting at high amperage.
#CNCPlasma #HFInterference #Mach3 #DIYCNCMill #3018CNC #Fusion360 #Tutorials In this video, I summarized quickly all the tricks and tips that I did to make my cheap plasma cutter cut50P (P for “pilot arc”) works perfectly with my home-built CNC plasma cutting table. – 1st tip: Use bigger torch that was designed for higher current. That way the nozzle and the electrode
I finally got to a setup of my CNC plasma cutting table that is interference free. That I can cut successfully every time without worrying that the high frequency noise will stop Mach3 in the middle.
This was achieved by using a breakout board that is connected to Mach3 through an Ethernet port.
The Ethernet protocol is more resilient against interference because the platform was design to transmit signal through a long distance without the errors inserted into the information being transmitted.
There are other choices of plasma cutter that can help avoiding the interference from the source, such as: blowback pilot arc plasma cutter, scratch off arc start plasma cutter.
Those plasma cutters don’t use high frequency voltage to initiate the arc, therefore, no high frequency interference.
With type of plasma cutters, you can use an USB breakout board for the low cost and convenience. But an Ethernet breakout controller board is still a better choice.
Mach3 or other platform that support the function of a THC system are recommended, therefore, GRBL based controller are not considered for plasma cutter for the lack of compatibility with THC system.
#CNCPlasma #HFInterference #Mach3 #DIYCNCMill #3018CNC #Fusion360 #Tutorials I finally got to a setup of my CNC plasma cutting table that is interference free. That I can cut successfully every time without worrying that the high frequency noise will stop Mach3 in the middle. This was achieved by using a breakout board that is connected to Mach3 through an Ethernet port.
