Using a flat surface, flip the front MDF frame part
upside down and slide an M5 washer on a self-
drilling screw, then start threading the self-
drilling screw into the appropriate hole of the
MDF frame. Once the head of the screw starts to
poke through the other side, slide the center hole
of the 2020 V rail over the screw point.
Press the V rail against the MDF frame, while
holding it down against the flat surface and keep
driving the screw in. Get it snug, but not super
tight. The machine is designed for the top of the
Y Axis V Rails to flush up to the top of the front
frame piece, so flipping it upside down and
using a flat surface will help flush things up.
You should now have both 2020 V Rails screwed
into the front frame piece. Grab one of the Y
Axis Bearing Plates that you already installed the
V wheel bearings on, and slide it onto the right
V rail. Notice that the Y Axis Bearing Plate has
one side that is longer than the other. The
longer side (the one with four total holes, two of
which have eccentric spacers in them), will go
towards the outside. The bolts on the outside
wheels should be loose enough to allow you to
spin the eccentric spacer with a 10mm wrench,
but not “sloppy loose.” Now spin the eccentric
spacer on one of the v wheels so as to tighten
the V wheel into the V channel in the V rail. It’s
probably already almost tight enough.
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