Originally Posted by Kiwi You will never get accuracy with variable pulleys unless it is toothed.
With pulleys there is slipage and the pitch circle is just a guess
When you run your program you will never know if the scale is correct. |
Exactly that. I was thinking timing belts with teeth. The tensioner doesn't need teeth of course....
You can get different sized pulleys with the same tooth spec... so you can still cange the drive ratio.
If timing belts are good enough to use in most small cars these days, then surely it'll work for a CNC machine
