[Alfawise U20] Rails Linéaires mgn12 sur l'axe Y , version 2

thingiverse

It appears that you have a detailed guide for assembling a 3D printing machine. I'll break down the instructions into sections for clarity. **Preparation** * 2 screws (3 x 10 mm) and 2 t-nuts (3 mm) * 4 aluminum squares to fix the profile * Centering guides **Off-Machine Assembly** 1. Assemble the rails on the profiles out of the machine with centering guides without tightening the screws too much. 2. Mount "Y_Fixation\_MGN12\_mini" on the 4 MGN12 trolleys (5 mm diameter holes to the outside of the machine) and block the carriages so that they do not leave the rail during handling. **Assembly On The Machine** 1. Remove the heating plate, rollers, and loosen the belt. 2. Refit 2 rollers on the right side and 1 eccentric on the left side and tighten them normally. 3. Position the first hole on the front profile and use a 3 x 10 + nylock screw per rail, tighten slightly. 4. Tighten the rail screws with the centering guide, then loosen the 10 mm screw from the front. 5. Put the 2 screws (5 mm) without tightening them. **Right Side** 1. Aluminum plate in the center of the machine and pull the straight profile outwards so that the 5 mm dia screws are at the edge of the oblong and tighten them. 2. Check the position of the rail relative to the frame of the machine and tighten the 10 mm screw at the front. 3. Check the parallelism of the rail and lock the position at the back to the enclosed greenhouse. 4. Block the profile with the aluminum squares and all the screws on the right side and recheck the parallelism. **Left Side** 1. Aluminum plate in the center of the machine and pull the straight section outwards so that the screws dia 5 mm on the left side are at the edge of the oblong and tighten slightly. 2. Remove the rollers to prevent any displacement and move the aluminum plate back and forth, he must move freely if not check and rectify. **Final Assembly** 1. Put the belt back on the engine. 2. Put back the heating plate. 3. Mounting out of the machine on the 4 screws: * Lock the screw on the plate with the washer and a nylock nut * Then put the nut and the nut nylock (without tightening them) * Set with caliper at 17 mm (between the plate and the last nylock nut) and lock with the locknut. 4. Check the flatness and if the complete assembly of the rails was done correctly the defect should not exceed 0.1 mm. This guide seems comprehensive, covering both off-machine and on-machine assembly steps.