Hello everyone,
I recently purchased a used 100w 1390 chinese laser cutter. But i knew i had to change the power supply and the tube at the time of the purchase. I ordered a HY-DY13 power supply and a 100w tube that i fitted in but the tube is arcing internally. I also tried to install a Ammeter to the machine to check whats happening with the power as it cuts 3mm acrylic at 6mm/s @ 50%. Any faster than that it wont cut it.
When the Ammeter is connected and i press pulse the needle jumps to max no matter what the power setting is set to. Any help would be greatly appreciated.