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Topics - steve.smith@narstco.com

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I have a Plasma Route CNC plasma cutting table with 3 axis stepper motor set up.  It is running mach and has a thermal height control (THC) that the company provided.  The THC has a "brain" that senses off the plasma cutter and sends information to Mach 3.

My Problem:
I can cut with no problem when The THC is turned off.  The cut is very smooth and almost straight up and down.  When I turn the THC on the Z axis jumps up and down continuously during cutting which produces a terrible cut (jagged and tapered). 

Question:
How can I adjust the THC so that it cuts smooth like it does without it on.  I have to Use the THC because all the plates I get are always bowed. 

I'm in a pinch and need this quick, Please help.

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