Sienci Labs LongMill MK2, Assembly Manual

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For both Y-axes, position a motor assembly at the back foot making sure the motor wire faces down. Slide the
motor shaft into the coupler, then tighten all four M5-50mm screws into the foot. Once the motor is secure,
tighten the set screw on the motor side of the coupler (pictured).
If everything has come together well so far, you should be able to now check that the lead screw can spin
relatively easily. If you find that the motor
shaft doesn’t fit into the coupler
it’s likely that you tightened the
motor-side set screw earlier on and have now deformed it. There is a chance for fixing this: take the motor-side
set screw out of the coupler and insert anything thin like a box knife, putty knife, or paint scraper into the vertical
slot of the coupler. Then screw in the set screw from the opposite side until it hits the inserted object. Rotate it
against the object a couple turns to open up the slot again, then back the screw out again, remove the object, and
reinsert the screw back to where it should be.
Wires facing down
!
x2
(mirrored)
Use M5 & M3
Allen Key