the belt should be around 80cm
I didn’t have the longer screws so I carved the holes a bit deeper
I had the same issue but didn’t have any spare M3x20mm so I skipped the washers, and was very gentle when tightening.
OK - step 19 is about aligning the gears
I would add a check to see if the gears are aligned properly and test if the gears can grab each other and a test filament inserted through the unit, with the idler closed pulling the filament back and forth.
With my motor the alignment was different. What matters is that the gears fully connect and engage, and hold the filament together, so the gears have to be aligned. I could do that by inserting a filament and positioned the gear so that the little groove aligns with the filament. Gear alignment can also be double-checked after step 14.
I think there is a typo and the screws should be M3x10mm instead of M3x18mm, as also referred to in step 4.
is it the inside of the bearing that should be tested for the rotation to determine the force applied with the screws? they still rotate around if fully tightened. Or is it the 45 degree angle rotation of the whole housing of the bearing inside the bearing holder that should be tested for rotation? It is not quite clear.
my motor’s shaft’s flatness doesn’t go deep enough to be able to leave only 1mm gap and have one of the grab screws tightened against the flat surface. In the closest position I have 5mm space and cannot go lower.
As a newcomer I couldn’t find it anywhere - the Y belt is the shorter belt measuring around 650-670mm