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### Author Topic: Mach turn wizard  (Read 2104 times)

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#### millman

• 4
##### Mach turn wizard
« on: October 16, 2014, 07:05:36 PM »
Hi- I'm new to the system.  Trying to turn a simple diameter using the mach turn wizard.  I am in diameter mode and absolute positioning.
I set my clearance to 0.012", but the wizard doubles the amount to 0.024" in the G code.

EXAMPLE   X start is 0.755  X end is 0.725  Clearance is 0.012

When the code posts it shows the X position as 0.779 instead of 0.767

When I run the program it also cuts double and my part ends up at 0.695
It's clear that X is travelling twice as far as it should, but I can't understand why.

Thanks in advance for any help

#### Hood

• 25,835
• Carnoustie, Scotland
##### Re: Mach turn wizard
« Reply #1 on: October 18, 2014, 02:37:26 PM »
When in Dia mode your clearance in code would be represented by double the value you enter. It will only move the distance, on the X axis,  you enter but on the Dia it will be twice the value.
Maybe I am misunderstanding what you are meaning ?
Hood

#### millman

• 4
##### Re: Mach turn wizard
« Reply #2 on: October 18, 2014, 07:40:51 PM »
Hood,
Thanks, I finally  came to that conclusion- maybe in the coding it is adding the clearance to both sides of the part.  I was still getting the double cut error, and after trying about everything by trial and error, I found 2 issues
1.  If Jog is turned on it wants to cut double
2.  If backlash compensation is turned on it seems to double the backlash value of X when in diameter mode.
Once I turned those 2 items off I was getting cuts accurate within the range of the machine back lash.   My next plan ( after resting my feet) is to cut the X axis backlash setting in half and see if that works.

#### Hood

• 25,835
• Carnoustie, Scotland
##### Re: Mach turn wizard
« Reply #3 on: October 20, 2014, 05:25:54 AM »
Are you using an external controller or the Parallel Port?

Hood