Sieg X3 Super - Simple CNC conversion.
Using mainly commercially available parts and a few very simple fabrications.
CNC
X3
Belts and Pulleys
I like the idea of using belt drives. Not only to magnify the effective power generated by the stepper motors, but also to save space. The machine will be more compact on the work bench. The one disadvantage will be making rapid moves slightly slower. But for home use this is unimportant.
*** Ideal for home machines where space is usually at a premium. ***
If you look at some of the other milling machine conversions, you will see they are concerned with the power needed to lift the milling Head on the z axis. In many cases they recommend a gas strut to take some of the weight off the head.
To overcome this I wanted a large reduction drive to increase to torque. After all when machining you will usually only need very small movements on the z axis as we normally only take very small cuts.
I have used Standard 10 mm pulleys and belts with the following gear ratios. I already had these in my spare parts box at the time of building.