Very new at this sort of thing? Received a g code from a friend that makes a horse portrait. I don't have the original drawing. It's about 3" x 3 1/2" when finished. Would like to reduce this, to scale, of a much smaller portrait. Any & all suggestions would be appreciated. Thank you very much! PM   

Are you using Mach3?

"5. Mach3 has a scale feature that will allow you to cut the same G-code file to different sizes using the scale feature."
Excerpted from:
http://www.practicalmachinist.com/vb/cad-cam/mach3-gcode-200019/

Different controllers use different "dialects" of G-code. If your supports it, use this:

G50 and G51 - Scale Factors

Details:
To define a scale factor which will be applied to an X, Y, Z, A, I & J word before it is used program: G51 X~ Y~ Z~ A~ where the X, Y, Z etc. words are the scale factors for the given axes. These values are, of course, never themselves scaled.

It is not permitted to use unequal scale factors to produce elliptical arcs with G2 or G3.

To reset the scale factors of all axes to 1.0 program: G50.
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Excerpted from:
http://www.tormach.com/g50_g51.html

-- 


Ron Thompson 
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