Hi
This is my first post and I fairly new to CNC so it may be a dumb question.
I've built a CNC hot wire foam cutter for building RC wings and fuselages and I've set up MACH3 units to be in millimeters.  I run some test cuts on some small wing profiles and everything is good.  So now I want to cut a wing to actually  for flying with.  I'm using Profili2 to design the wing and generate the gcode.  I'm using a old plan in inches and have created the gcode OK. 
I now there is a gcode to specify inches or millimeters so even though I set my machine up to use millimeters if the gcode says inches at the start will it do the conversion or do I need to convert it all first.

My machine build and a video of it working can be seen at http://www.rckeith.co.uk/cncfc.html

A G20 at the start of the code will tell Mach that it is Imperial and it should run fine.
Hood

Hi Keith,

Nice RC website. 

Tweakie.

Thanks.  I'll give it it a try.

keith