Interesting: that would suggest the pitch is smaller than 1.25 ???Quote:
..it transpires my steppers need 1286 pulses to move the axis 1mm. (not that I think I'd have noticed!)
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Interesting: that would suggest the pitch is smaller than 1.25 ???Quote:
..it transpires my steppers need 1286 pulses to move the axis 1mm. (not that I think I'd have noticed!)
Assuming you're using Delrin nuts, you make sure you have a 100mm more than you need, chuck it in the lathe (or a drill chuck), spin it up and file a taper on it for the last 20mm, then at the other end file some flats to hold it in a tap wrench. It'll work fine as a tap for delrin with a bit of lube and some muscle....
Or find someone who has the relevant tap and borrow it...