Hood,

Is this what you need?

The xml is a file that holds your configuration settings and can be found in the main Mach3 folder on your drive (not the xmlbackup folder) There will be a few xml files but the one you want is the one that has the name of the profile you are using, for example if you are using the standard Mill profile it will be called Mach3Mill.xml if you have a custom profile it will have that name.
 You will need to copy the xml to your desktop and rename so that the forum will accept it.
Hood

AJA,
  could be your native units... ? Is it set to INCH ?
The code is G21MM.
17.9441 x 25.4 = 455.780

Looks like it's just converting ... not really changing.
Just a thought

I would say that you are spot on there Russ good catch

Hood

Overloaded,

The g21(mm) is line 03 in program.

The the values are in millimeters.

Is there somewhere else I need to change the millimeters?

Config menu then Native Units will tell you what you have set up in. If you are meant to be metric but have inch there then you will need to re do your motor tuning if you change it.
Hood

AJA, is the machine actually NOT moving to the correct position ? ? ? or, are the DRO's just showing the difference ?
Mach should handle the conversions ... regardless of the native settings.
Pretty sure anyway.
Hood ?

Russ, yes it should handle it but it could be that the native units are set to Inch and then the steps per unit are set so that 1 unit moves 1mm. If that is the case then things will screw up when code with a G21 in it is run.

AJA
 If you can attach your xml it should let me see if you have things set correctly regards native units and motor tuning.
Hood

Hood,

I have to copy the file from one machine to another.  I have the file on the desktop of the machine connected to the internet, but can not attach it to my reply  -path does not exist ??