Capping the extruder bar
The roller bracket is the pyramid-shaped piece with three wheels. It attaches to the end of the extruder bar, where it will guide and tension the belt that moves your print head.For this step you need two more M4x16 screws (from the same bag as before) and the number 3 Allen wrench.
Step 6: attaching the roller bracket to the bar end
Step-by-step
1
Understand the fit
The bracket has three wheels on one side and four nuts on the other. The bar end has a metal cutout that houses a nut. The single wheel seats into that cutout; the two bracket holes line up with the two remaining bar holes.
2
Seat the bracket
Slide the bracket onto the bar end so the single wheel drops into the cutout and the piece sits flush. The wheels must be on the same side as the extruder carriage’s rollers.
3
Screw it down
Feed the two M4x16 screws through the bar and hand-thread them with the number 3 Allen wrench (one between the two wheels, one by the single wheel). Line them up carefully, then tighten both fully.
The roller bracket is bolted firmly to the end of the bar, its wheels are on the same side as the carriage rollers, and the cable still trails to the back.