String pulley bend radius:
Braided line can run across an acute angle fairly efficiently.
Pulley Diameter:
If the diameter of the braided line is .02” inch (.5 mm) x 3 = Dia 0.06” inch (1.5 mm).
You could use a carpenters nail as the pivot.
A piece of 304 SS IV tubing could be slide over the nail to act as a bearing/pulley.
You could cut short pieces and flare the ends to trap the line.
Or press bushings/bearings into the sidewalls and let the nail spin.
[www.samsonrope.com]
End Stop, Microswitch, Hall effect sensor:
@NewPerfection, Tks!
Nicholas said that he is using “off-the-shelf Repetier Host and Firmware”.
I would imagine that the end stop code is similar to Marlin?
Hall effect sensor are super cheap on ebay, but I don't know the cost of the supporting bits and pieces.
A2