Centroid Community CNC Support Forum

BoenBuilt wrote: ↑Thu Jun 15, 2023 4:41 am What about adding a feature using one of the relay outputs to override the air solenoid valve in the plasma machine, to blast some air out of the nozzle at safe height on the pierce point to blow any water out of the nozzle and off of the material, shutting off as the nozzle starts to come down for touch off? Call it Ohmic clear or something.

Just getting used to having ohmic, I'm coming from a Plasmacam machine without a water bed that just stalled the Z stepper on the material to set torch 0.

Any thoughts?

ShawnM wrote: ↑Thu Jun 15, 2023 7:24 am In the Hypertherm machines that air is controlled by the plasma cutter itself. There is no way to override it that I’m aware of. Maybe the other brand plasma machines have a way to do this but I don’t think it’s possible with Hypertherm. In the past I’ve just used the Test Fire button to clear water or debris out of the tip. You might want to look at adding a float switch to your machine but they are not the best option if you cut a lot of thin material. Keep your water level away from the material as far as possible. Mine is about 3/4” to 1” away.

Joey wrote: ↑Thu Jun 15, 2023 4:14 pm

BoenBuilt wrote: ↑Thu Jun 15, 2023 4:41 am What about adding a feature using one of the relay outputs to override the air solenoid valve in the plasma machine, to blast some air out of the nozzle at safe height on the pierce point to blow any water out of the nozzle and off of the material, shutting off as the nozzle starts to come down for touch off? Call it Ohmic clear or something.

Just getting used to having ohmic, I'm coming from a Plasmacam machine without a water bed that just stalled the Z stepper on the material to set torch 0.

Any thoughts?

The Current Pierce Macro already clears/purges the nozzle if the torch touch is tripped going into the touch off cycle.

We can modify your M61 Pierce to Post Flow every time before the Touch off cycle? Most likely the Post flow will still be on during the touch off cycle but that shouldn't interfere with anything. In fact it may help that the Post flow is still pushing air through the torch tip while touching off.

BoenBuilt wrote: ↑Fri Jun 16, 2023 1:42 am The Hypertherm g3's just have an SMC solenoid valve in it ran by a relay on the main board, wouldn't hurt anything to power it from a Centroid PLC relay with an external supply to blast air without firing the torch.

Machine has a float switch, it will mostly be cutting .090" aluminum, which kind of sucks for a float setup especially after running through most of the sheet and things start to get a little warpy.