Thread: 3 Axis CNC router
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04-05-2012 #3
1)I'd use 5mm pitch 15mm wide belts:
http://www.bearingstation.co.uk/prod...iming_Belts/5M
2) Just a grubscrew is generally fine.
3) No
3 again) Probably not. I generally mill a pocket out of the 20mm plate leaving 4mm or so for the motor to rest on yet still be well supported by the thicker material outside. Bit difficult if you don't have a mill though. You can extend the shaft, but it's a lot of extra parts and expense that shouldn't be necessary.
4) You can use idlers to tension the belt, but it's generally easier to have the motor mount slotted so you can apply tension by pushing against the motor and tightening it down.
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