Originally Posted by
brogger00
Hi Everyone,
I was wondering if you might be able to shed some light on an issue I am having at the moment:
I am not getting quality cuts in the negative x-axis on my table, the positive x-axis cuts look good, but negative does not cut through the metal it just brushes along the top until the torch changes axis/direction. I always see the tell-tale sign of a bad cut, sparks flying everywhere above metal, voltage spikes from 80 to 100-115, and I see the molten metal on top of the material.
I know this sounds ridiculous and sounds more than likely a consumables issue but I have changed them out several times and this continues to happen.
I am using a hypertherm 1650 with fine cut consumables and operate at 50 amps, 70 ipm and only cut 11ga stainless.
I looked at the motor tuning and setup all the axis again. Then looked at acceleration, made a couple test cuts and there was virtually no difference in any of them. I thought maybe there was some dirt/oils/added resistance on the material so I began wiping it with a clean cloth prior to cutting, no effect.
The material is not warping at all when I cut so the THC is not the issue.
The air is of fine quality, the compressor is brand new with a water separator. Water level in table is not too high. Grounding also should not be an issue, I clamped right to metal and still no differences.
The last thing I continue to see is nozzles tend to be completely blown out after a mere 50 or so cuts, which is a direct result of the poor cuts being made. I cut out about 10 copies of everything I make and I see absolutely zero consistency between my cuts. One will be perfect, another will have a slight bevel (about .1"), the next will not cut properly. The whole situation at the moment is mind-boggling and I have been racking my brain since Monday to come up with an answer.
Any help would be greatly appreciated.
Thanks,
Brendan