Hi,
To all those who provided input to this thread I want to thank you very much. Although I have arrived at a different "solution" than those suggested it was as a result of your input that steered me until I arrived at the following.
1. I save the file in Turbo Cad in inches.
2. In Lazy Cam under the scale menu I convert inches>mm and post to gcode
3. In Mach 3 my native units are mm (don't know if that matters or not) and then the file opens to a recognizable size. I'm still out about 3% but I can componsate for that in Lazy Cam Scale dialogue box. In my application of cutting wooden clock gears I will have to be within 1mm in 200 on overall size.
John |