mach 3 scaling issue

[terry1956]

hi. just an update. I made a small demo shape using lazy cam and then used this on the proxxon. the machine cut the shape. so it must be a fault in the way the artcam g code is being read by Mach3, and not the machine itself or the way Mach3 is set up on the machine.
anyone any ideas on this.

[stirling]

OK - if you post your settings file here from your c:\mach3 folder. It's usually called Mach3Mill.xml

[AndyGuid]

hi. just an update. I made a small demo shape using lazy cam and then used this on the proxxon. the machine cut the shape. so it must be a fault in the way the artcam g code is being read by Mach3, and not the machine itself or the way Mach3 is set up on the machine.
anyone any ideas on this.

@terry1956:
As an outsider looking in please would you mention whether you tried any of the previous well considered suggestions and/or the results of those suggestions, so we can all learn.
Thanks, Andy

[terry1956]

Ok.update on this so far. The mach3 software is my own. The proxxon mill cuts to scale on all the test g codes to set up in mach3. The over upscaling comes into play when I used g code written by art cam express and used this program to post the g code in mach3 tap format. Using a cam edit software to view the g code turned up know errors.but mach 3 did not like the code and upscaled the work. To make sure it was not the mach software at fault I used an old test g code which resulted in the mill cutting the design correctly..at the moment it looks to me like the fault lays between the art cam way of writing g code and mach3 reading the art cam g code.
I am going to try a second program later today to write the g code.Will post how I get on later this week.

[JAZZCNC]

Terry like Andy ask's did you try any of the suggestions and do the corrections.?

The G-code works fine so it's not the code. it's also very simple code nothing fancy.
There are very few settings in mach3 other than wrong steps per that will make it do what you describe. I've mentioned most of them.

[terry1956]

I have done all the tests. On the machine coordinates test.the machine moved the correct distance. Using a demo from lazy cam the machine cut correctly. Any other g code it scales to large. Today I am going to reload mach3 on the machine pc. And try the tests again and try some project g code.