Prusa Research i3 MK3S+, Manual

Page: 39 / 144

3. X-axis assembly
Original Prusa i3 MK3S+ kit assembly 39
STEP 5 X-end-motor: tensioner assembly
Insert the square nut all the way in.
Insert the M3x30 screw. For now,
we need the screw just to hold in
place. Do not tighten the screw
fully. Leave a 2 mm (0.079 inch)
gap between the screw head and
the plastic part. We will adjust the
final position later.
STEP 6 X-end-idler: bearing assembly
ATTENTION : be very careful during the tightening, check the nut orientation and
DO NOT use excessive force, you can break this part.
Insert the M3nN nyloc nut in the X-end-idler.
In case you can't press the nut in,
don't use excessive force . Leave the nut for now
and proceed with the other components for this step.
Insert the 623h bearing into the X-end idler.
Secure it in place using an M3x18 screw.
Now, if needed, use the M3 screw to pull the nut in.
Place your finger on the bearing and ensure it can rotate freely. If needed adjust the
screw.