Roland TrueVIS SG3-540 Setup Manual page 22

Move the arm to the left and right until these protrusions are centered.
5.
Temporarily tighten the bolts at the bottom of the left arm.
6.
Use a hexagonal wrench to fully tighten the upper bolts
7.
In the same manner, attach the right arm to the right side as seen from the front of the printer.
1. Assembly and Ink Filling
followed by the lower bolts .
21
Installation