Each corner is secured and supported by two cast
aluminum corner brackets. Start putting the brackets
on one corner at the time, with the bottom bracket
first. To complete this step, you’ll need (8) corner
brackets, (16) M5x25 machine screws, (16) M5
washers, and (16) regular M5 nuts.
NOTE: Starting in
January 2017, some kits shipped with slots in the
MDF frame pieces to allow clearance for the tabs on
the back of the corner bracket. If your kit is like this,
be sure to use the 8 corner brackets that still have
tabs on the back for connecting the frame pieces and
leave the 2 that have tabs ground off for the idler
bearing mounts.
Slide an M5 washer onto an M5x25 screw and put it
through one of the bottom holes in the frame so
that the threads are sticking through the other side.
Slide the corner bracket over the threads and into
the corner. Hold that in place while you finger
tighten a nut onto the threads. It will be easier for
you to just get the nuts started on the threads then
turn the screw head with a
screw driver. Don’t
tighten anything up yet. Now install the second
screw on this corner bracket the same way.
Move onto the top corner bracket for this corner and
install it the same way. As you put the second screw
in the bracket, you may have to first press the nut
against the inside of the bracket and then begin to
screw it in, in order to get clearance. Do all four
corners now, leaving it all a bit loose. Confirm that
the frame pieces are squared up, then tighten all the
corner bracket screws. You can use needle nose
pliers to hold the M5 nut in the corner bracket at you
tighten the screw head. You might also be able to
use a deep 8mm socket and ratchet.
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