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Author Topic: Noob ? on cutter comp  (Read 2006 times)

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Offline Ussca

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Noob ? on cutter comp
« on: May 21, 2009, 02:31:08 PM »
I am using Mach3 and am getting irratic measurements. The piece will be off .040 over on one spot and .100 on another. I checked and all  code is correct. I am sure I am overlooking something. I had a .125 cutter in the mill and it was .050 over, so I changed cutter diameter to .100 and it only changed .020? I should not have to amend every measurement to get what the print says.

Why would an X number be off .050 and a Y number be off .100????

HELP PLEASE!!

Offline Hood

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Re: Noob ? on cutter comp
« Reply #1 on: May 21, 2009, 02:57:48 PM »
Have you checked to see that you are getting accurate cuts when doing a simple one axis move, sounds like maybe your steps per unit are out of you have some lost motion somewhere.
Hood

Offline Ussca

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Re: Noob ? on cutter comp
« Reply #2 on: May 21, 2009, 03:38:35 PM »
That was my firsts thoughts too. SO, I checked that first with a 3" gauge block and also checked backlash, both appear to be correct. I am using servo motors and steps are about 12K.

There must be some software trick I am not doing. My thinking is that because when I changed the tool diameter it did not change accordingly, again irratic numbers.

Offline Hood

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Re: Noob ? on cutter comp
« Reply #3 on: May 21, 2009, 04:43:16 PM »
If you cut a simple shape such as a circle or rectangle does it come out on size?

Hood