Sienci Labs LongMill V2, Assembly Manual

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Next, we’ll be putting the two Y-gantries onto each end of the X-axis rail. The orientation of each Y-gantry will be
such that the wheels on the gantry will be facing towards the outside. Let’s start with the right-hand side.
Line up the ‘L’-shaped slot on the steel plate with the rail and tap the plate into place. It works best if you put the
slot and the rail head-on so that the slot and the rail line up straight. Note that because of the variance of paint
thickness in the slot, you’ll chip some of it out as you mount the plate. These parts are a tight fit so that twisting in
the X-axis can be kept to a minimum, so using a mallet and some coercion may be necessary but most importantly
take your time.
Line up the slot to the rail carefully and tap it into place until the Y-gantry is up against the plastic shoulder bracket
Once you get the plate on, get the M8 nuts and M8-25 bolts from the yellow bag and use four of each to secure
the plate to the plastic shoulder bracket. The shoulder bracket has nut catches on it to help you put the bolts on
without the need for a wrench. Tighten the bolts down with a size 6 Allen key until snug. The shoulder bracket
should wind up flush with the steel plate.