XMT 304 Buzzes when Idling in Lift Arc

[jjohn76]

Yes, operator issues resolved....

[jjohn76]

After talking with Adrian at Miller Tech, my machine is running as it should. My other machines are different models and apparently have different lift arc circuits that don't make the buzzing noise.

[jjohn76]

My XMT 304, serial number LH360167A, works in all modes, except that it buzzes when Idling (input set to panel) in lift arc mode and the voltage jumps to ~15V. The buzzing is coming from the main transformer. The lift arc circuit still works - it keeps the current at 26a when the electrode touches the...

[jjohn76]

Dang, I used to get my rifle action pillars to fit with a drill motor and angle grinder, didn't even think about it for this. Thank you!

Edit - the more I think about the .020" difference between standoffs and the flex in the sheet aluminum mounts for the buss capacitors and contactors,...

[jjohn76]

Hi,

Does anyone know where to get the XMT304 Contactor Standoffs (part number 173763) that connect to the PC2 interconnect board? I cannot find anyone who sells them. They're aluminum male to female hex standoffs with 10-32 thread and body length of .855". The closest I have been...