Just finished the mechanical parts of my first 3D printer build, a self-sourced 2.4R2 (300mm). Everything seems to be fine except the following few issues:
- I cannot get the frame to be exactly square. There is ~1mm difference when I measured between two diagonal measures on 1 or 2 sides of the frame. The top side of the frame also not flush with my glass tabletop (~1mm raised at one corner). These happens whenever I tighten the screws. Is these acceptable or correctable in the future?
- I had to install a 0.5mm shim on one end of both bed support extrusion, otherwise they will bend the bottom front and back extrusions when I tighten the screws. Is it an acceptable solution to add the shims?
- When I tighten the screws on Z-motors, there was a click sound which sounded like something was clicked in place due to the torque. It happened to all four z-motor. Is that normal?
- I bought the wrong rubber foot and now I had to install them with a M5x30 screws plus some shims & nuts. There is still about 5mm of the screws stick out inside the Z-belt-drive assembly, but have a few millimetres clearance to the gear. Is this acceptable or should I buy some M5x20 screw to replace them?
- After installing the A/B belts, it required much more force to move along both X and Y rails compared to pre-belt-installation. I followed the instructions on Nero 3D de-racking video, successfully de-rack the gantry. But I noticed that he can move along the X/Y rails even after installing the belts (at 10:28) in a much smoother way than I do. Is this normal in my case? Is this related to the motor (LDO-42STH48-2004MAH in my case)?