A few years a go I built a cnc mill following some YouTube videos. I went to town on the electrics & skimped on everything else, Slowly but surely I have replaced a lot of the machine, Aluminium Right Angles with skateboard bearings turned into 20mm Precision Rails with matching Housed Bearings etc.
I have always run it on some rather cheap 10mm lead screws with brass nuts, but due to the size of the machine & my rather abusive machine tool ethic they are rather worse for wear and need replacing.
A friend who had seen some rather impressive videos of timing belts on cnc machines has suggested I consider them. I think he's obsessed with speed personally & I'm not sure he understands the limits of forcing a cutter through a block. However, considering their price I'm rather interested but a little lost as far as gearing etc. goes. I've spent many hours trawling through posts on this website and others, but I've ended up with more questions than answers.
So what I have:
3 x sy6osth86-3008BF Steppers (I think their Nema 23 460oz, 2000 steps per rev due to MicroStepper Drivers)
3 x M752 Lead shine Drivers
1 x PcPPS v3 Breakout Board
2 x X axis 1000mm 20mm Rails
2 x Y axis 800mm 20mm Rails
2 x Z axis 500mm 12mm Rails
3 x 10mm Lead Screw with Brass Nuts (slightly bent )
Dewalt Router (approx. 1000w)
Due to a fixed central gantry the cutting area isn't maximised, its approx. 450mm X, 450mm Y, 300mm Z.
What I'm looking at:
25mm T5 Timing Belt (2 x for X axis, 1 either side & then 1 for the Y axis & 1 for the Z).
Timing Pulleys (No. of Teeth & Size unknown?!? This is my main question really)
I'm considering going back to a moving gantry on the X axis to maximise the cutting area. Stealing the Z axis stepper as to have dual steppers driving the X axis, 1 either side (Z axis being replaced with a new stepper and driver). Or using 1 Stepper running both X axis Pulleys through a shaft.
I can see how to implement the pulleys but haven't got a clue about gearing, torque, speed, etc.
Any and all suggestions are welcome.