I’ve been cutting without an issue for 6 months up to 3/16 thick and 4min profiles. The problems started intermittently when the humidity went up in August. Due to monsoon (Santa Fe, NM) I had some cut issues and found minimal water in the line. Now I have in line filters. Always cut with smart voltage and check consumables regularly. The other night the torch height went out of control, probably .250 high and warped the metal instead of cutting. No change in set up except filters in all this time.
Now I have installed an eight foot ground rod three feet from the table. I have 8 awg wire to all motor gantries, the torch holder, z-motor, table water pan, cnc case and they terminate on a ground buss with 6awg solid copper to the ground rod. Checking continuity at various points and almost all are under 1 ohm. Ferrite beads are on order. Still need to run test cuts later this week.
Anything I am missing?