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Author Topic: Proma THC success , question about resetting zero  (Read 714 times)

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Proma THC success , question about resetting zero
« on: November 30, 2017, 06:21:30 AM »
Hi, Have Mach 3 running a plasma cutter via Smoothstepper Ethernet card and Proma THC.

Everything is working well.     except... this is happening..

If I am doing multiple cuts in a program , cutting out the letters of a word for example.

the Torchhead is crashing into heat buckled sheet , as it moves between cut sequences.

my procedure is -

manually set z-axis Zero.

run program , plasma starts, z axis moves to pierce height , thc adjusts height during first cut as material warps with heat.

program commands plasma off.

Head raises to safe travel height , moves to next pierce point.

Machine then attempts to drive down to the originally set pierce height when the sheet was flat.

As the material has warped (higher of course) this is now the incorrect height.

Z-axis either stalls out or plasma fails to fire because it is in contact with the workpiece.

Is there a way of automatically re-zeroing after each cut by the amount of the THC adjustment ?

Or am I missing something obvious ?

help....

cheers

Art




« Last Edit: November 30, 2017, 06:24:21 AM by mechfx »