Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: Bobo on December 13, 2006, 09:02:16 AM

Title: Mach3 thinks it's moving Z from THC but Torch height unchanged
Post by: Bobo on December 13, 2006, 09:02:16 AM

I emailed Jim Cullins about this issue also. The last thing Jim had me do is add a grounding rod near the table and ground the plasma chassis and table with a 1 inch copper strap.

The problem is consistent. The THC300 sends up and down signals to Mach3 and Mach3 thinks it's moving the z axis, according to the DROs and It will quickly get to the maximum correction of +/- 1.000 inches, but when I physically measure the z on the table it is unchanged or at least no where near 1 inch of change.

The software and table function fine as a 3 axis mill including the z axis and I can plasma cut parts all day long without the THC as long as my material is flat.

Below is the simple GCode I'm using for testing.

N0030 G20 (Units: Inches)
N0040 G53 G90 G40
N150 M3
N200 G1 Y20 F90
N300 M5
N310 M30

Thx for any help.

Title: Re: Mach3 thinks it's moving Z from THC but Torch height unchanged
Post by: Brian Barker on December 15, 2006, 08:00:34 AM

Set the rate to correct the axis at a low number to start with and see if it works..
Thanks

Title: Re: Mach3 thinks it's moving Z from THC but Torch height unchanged
Post by: Bobo on December 15, 2006, 08:26:37 AM

Please forgive my ignorance.

You mean the acceleration rate of the z axis or the Z speed correction factor?

Title: Re: Mach3 thinks it's moving Z from THC but Torch height unchanged
Post by: Brian Barker on December 16, 2006, 04:35:00 PM

No there is a setting that is the speed setting for the plasma correction rate.. If you could please post or send me your XML and screen set that you are running and I will see where you have the setting

Thanks
Brian

Title: Re: Mach3 thinks it's moving Z from THC but Torch height unchanged
Post by: Bobo on December 18, 2006, 11:58:37 AM

Here ya go.

Thanks much.

Title: Re: Mach3 thinks it's moving Z from THC but Torch height unchanged
Post by: Brian Barker on December 18, 2006, 12:22:39 PM

You don't need to be in 45KHz mode so set that to be 25KHz and it should start working...
Tell me if that makes it any better

Title: Re: Mach3 thinks it's moving Z from THC but Torch height unchanged
Post by: Bobo on December 18, 2006, 12:42:43 PM

Wow!!! I hope it's that simple.

I'll try it tonight.

Title: Re: Mach3 thinks it's moving Z from THC but Torch height unchanged
Post by: Bobo on December 21, 2006, 09:43:30 AM

Seems to be working now.

Thanks a bunch.

Title: Re: Mach3 thinks it's moving Z from THC but Torch height unchanged
Post by: Brian Barker on December 21, 2006, 04:26:05 PM

No problem :)
Did you tell Jim what the problem was?

Title: Re: Mach3 thinks it's moving Z from THC but Torch height unchanged
Post by: Bobo on January 05, 2007, 01:12:08 PM

Actually Jim stopped by to check out my set up. Great guy. THC is working great now.

Thx much.

Title: Re: Mach3 thinks it's moving Z from THC but Torch height unchanged
Post by: Brian Barker on January 05, 2007, 02:40:49 PM

Cool, looks like one of your girls in the pic has an anger problem ;)

Happy cuts
Brian