Updated Thumbwheels for Hadley Adapted FuseBridge Focuser

prusaprinters

<p>Sasha D's Crayford-style focuser for the Hadley telescope is excellent! &nbsp;I highly, highly recommend it. &nbsp;Focus adjustments are MUCH smoother with the Crayford-style focuser. &nbsp;</p><p>I ended up stripping the plastic threads on one of the setscrews in the thumbwheel, so I decided to make a version of the thumbwheel that uses heat set m3x.5 threaded inserts to make it much easier to get a little torque on the set screw without worrying about stripping the plastic threads. &nbsp;</p><p>I also made the knobs a bit longer so that they stick out slightly past the edges of the main body of the focuser to make them a bit easier to grab. &nbsp;</p><p>The hole for the m3x.5 insert is 4.5mm in diameter and 6 mm deep. &nbsp;I ended up needing to clean out the hole that the adjustment rod inserts into with a 4mm drill bit after the heat set insert pushed a bit of plastic into the rod insertion hole. &nbsp;</p>