Due to the small diameter of the AZ axis bearing, there was noticeable wobbling on that point. I made 6 PTFE support pads, installed them in 3D printed holders, they slide on the surface of plywood pre-coated in epoxy and sanded with 400-grit sandpaper. That supports were leveled with spacers to aligned them in the plane.
Most of the weight still applied to support roller bearing, but the PTFE sliding items take the load in case of any inclination, so the wobbling feels eliminated completely, while the motor spins everything without problems and the timing belt does not slip.
About the motors, I added 1:10 planetary gearboxes, so no anymore torque issues in case of tube imbalance, the torque is plenty.
Put it on legs for more comfortable access to the eyepiece. The legs are removable and made of 4 layers of 12mm plywood glued with epoxy. This is temporary solution, someday I will replace this tube with a longer one, something like 300 F1:6.5, more suitable for visual observations, especially for planets, and no legs will be necessary for that tube length. There are also thoughts of replacing the 2GT 6mm belt on ALT axis with a GT3 10mm, and reprinting the vertical axis pulley, making it a bit bigger and with a 3GT profile. This will improve rigidity in ALT direction.
But these are plans for future refinements.
In general the telescope is ready for first light!
Last edited by Pilgrim; 19-10-2024 at 06:17 PM.
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