⬢Insert the Y-axis stage into the frame as close to Y-corners as possible.
⬢Adjust and tighten the M8n nuts.
⬢Rotate the Y-axis stage and repeat.
After adjusting, the Y-axis stage should cause minimum movement while inserted into the frame.
Tighten the M8n nuts gently or you'll risk damaging the 3D printed parts.
It is incredibly important that the axis is perfectly rectangular at this stage of construction, all rods need to be perfectly straight and level. If not, you'll have troubles calibrating later on!
The aluminium frame is used just to set the proper dimension, do not mount it to the Y-axis, we will do that later.