Some design questions

[irving2008]

Don't bother with the Astrosyns, they are too low torque and too high inductance to be useful in any reasonable machine. I too have a box of 4 that never got close to a machine...

[JAZZCNC]

Ebay the lot and start again trust me on this you will only regret not doing it.!!

Irving's correct those motors are no use for anything much more than cutting air.!

Forget offset screws wires and all that rubbish again it's just doomed to failure and those that have done it have only done it to try get around the mess they made of first attempt.!! . . . . And that mostly that doesn't work so ends up getting scraped anyway. . . . .They just tend not to mention this bit.!!

Also depending what you want to cut and how machines built will determine if you need twin screws or not. If just cutting wood and softer materials then 500-600mm is no problem for a single centre driven screw machine. Harder materials or wider than 700mm then go with with twin screws.