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### Author Topic: Cut2D and Z-Axis  (Read 4385 times)

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#### jgschmidt

• 12
##### Cut2D and Z-Axis
« on: May 17, 2009, 03:11:57 AM »
I'm using a Zenbot, Mach 3 and Cut2D. Hardware is working fine.  I would like 0,0,0 (home) to be with tool (Z) at highest. This means max depth is at -4.00 inches.  My manually coded programs work as expected.
However, when I create my toolpath in Cut2D, the lowest point is zero and I can not set it to a negative number. When the G-Code is generated, all the Z references are from 0 to +4.00 instead of -4.00 to 0. Am I forced to set my zero for the Mach3 at the tabletop and give up homing ?

Or is it possible to home to a positive number? I'm sure other people are using Mach3 and Cut2D - how are you handling this?

Thanks.

#### Hood

• 25,846
• Carnoustie, Scotland
##### Re: Cut2D and Z-Axis
« Reply #1 on: May 17, 2009, 03:41:46 AM »
Dont know anything about Cut2D but kind of sounds like you may be using a plasma post processor.
Hood

#### jgschmidt

• 12
##### Re: Cut2D and Z-Axis
« Reply #2 on: May 17, 2009, 04:04:22 AM »
I am using the Mach2/3 post processor.

#### ger21

• 6,287
##### Re: Cut2D and Z-Axis
« Reply #3 on: May 17, 2009, 06:59:43 AM »
What most people do, is, in Cut 2D, set the top of your part to Z=0, and zero the Z axis to the top of your part.

There is another way. In the Homing/Limits screen, set the Home Offset for the Z axis to 4. That way, the table will be at Z=0 and the home position will be Z=4. Then, in Cut 2D, set Z=0 to the bottom of your part. The problem with this method is that if your part thickness is not exactly what it's supposed to be, your cut depths will be off by that same amount.
Gerry

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#### budman68

• 2,357
##### Re: Cut2D and Z-Axis
« Reply #4 on: May 17, 2009, 08:37:15 AM »
What most people do, is, in Cut 2D, set the top of your part to Z=0, and zero the Z axis to the top of your part.

That's the way I set it up.

Dave
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#### vmax549

##### Re: Cut2D and Z-Axis
« Reply #5 on: May 17, 2009, 04:20:25 PM »
Sounds like the POST needs to be fixed (;-) OR you are setting the parameters on the drawing incorrectly.

(;-)TP

#### jgschmidt

• 12
##### Re: Cut2D and Z-Axis
« Reply #6 on: May 17, 2009, 09:16:20 PM »