Hi,

I have a Powermax 105 power source with a Sensor PHC control and torcher lifter unit on an Esprit Lightening D plasma table. I am having issues with the torch diving into the plate in auto. The IHS works as it should, and the arc voltage is set according to the sheet thickness, consumable specs in the manual. But every time the torch dives and pulls the magnetic head off the lifter, whether its 3mm or 25mm thick sheet. To investigate the problem further I've dug out some 4mm plate with some very slight bends. The torch pierces, moves and ploughs directly into the steel as the gradient climbs. If I start the torch on the top and run it towards the downward gradient, it stays level and doesn't drop to follow the plate.

I've checked all the earths on the machine, adjusted arc voltages etc, but don't seem to be getting anywhere.

Can anyone recommend any other tests, or troubleshooting methods for this?

Many thanks
Jim