Barn Door Astro Tracker with Straight Drive Screw with polar alignment

thingiverse

Added a few items to the great barn door star tracker Astra V2.1: Barn Door Astro Tracker with Straight Drive Screw from atlantisq. I added an Arca Swiss tripod mount that has provisions to mount his Arduino and motor controller case to it. Also, I added a polar alignment scope mount and a laser mount. I used an M8 axel shaft and modeled the laser mount to screw into the protruding threads to get the laser as close as possible to the hinge. I added a second version of the lasermount. This one aligns the laser directly with the hinge. This threads onto an M8 axel bolt and uses a 12mm laser diode. I am very impressed with the original design of this tracker. It is very well built and holds my camera with ease. it just needed a method of polar alignment and a place to hold the electronics. Added a new case for an Arduino Uno.