Hi Robin,

Thanks for the quick reply. I guess my continuing to set ambitions above abilities is an on-going victory for hope over experience!

I'm interested in what you say about servo motors, rather than steppers. If you servos at all, I guess it's best to use them on all axes to have common control logic?

I appreciate your point about a 4ft gantry. I had seen the Blacktoe 4 x 8 project on buildyourcnc.com, which uses MDF for construction. However, I did note that the gantry structure was made pretty beefy. As for keeping it running square, at that size I'm guessing you need to provide a motor on each side to drive the x-axis?

Still a lot to learn.

Julie