I) Y Rail Installation

Moderate · 1 hour · by Ben Withem · last edited 2022-04-04

Parts

Step 1 — Front X Carriage Idler Assembly

  • To prep for the Y rail installation we need to assemble the X carriages and idlers. Locate the X carriage labelled as the "Front".
  • Begin by holding the shoulder bolt so the threads are pointed up. Place (3) M5 washers on the bolt, followed by (1) M5 shim. Next put on a toothed idler. Then another M5 shim, then a smooth idler, followed by a final M5 Shim.
  • Visually look to see that the final shim is very close to level with the "shoulder" of the bolt.
    • Note If there's a gap, see if it's best filled by a shim, or a washer. You want to place those before the first shim you put on.
    • Note If instead the shim sticks out past the shoulder, you may need to remove a washer and replace it with a shim.
  • Once the "stack" is level with the shoulder, thread it into the X carriage (I leave the shoulder bolt pointing up, and turn the X carriage down onto it, being careful not to cross-thread it).
  • Caution The shoulder must be tight against the X-Carriage, with as little vertical play as possible. If the idlers don't spin smoothly, it's too tight and you need to remove a washer or shim. THERE MUST ALWAYS BE A SHIM DIRECTLY AGAINST EACH SIDE OF THE IDLERS.

Step 2 — Back X Carriage Idler Assembly

  • Locate the X carriage labelled as the "Back".
  • Assemble the back X carriage the same way as the front, but note the smooth and the toothed pulleys are reversed now.

Step 3 — Insert Hardware In X Carriages (x2)

  • Insert (1) M3 x 10 socket head screw in the bottom of each carriage.
  • Insert (1) M3 x 16 socket head screw in the size of each carriage.

Step 4 — Insert Y Rail into X Carriages

  • To insert the Y rail into the X carriages it gets oriented as in the image. Be sure the "inside' faces with the text milled into them face each other.
  • There is a round metal spacer that goes between the Y rail and the horizontal part of the carriage. Lightly tighten the horizontal M3 bolt to hold it in place.
  • There is a flat aluminum spacer that goes under the Y rail. Lightly tighten vertical bolt under the Rail against that spacer.

Step 5 — Bolt Y Rail Assembly onto X Rails

  • Attach the X carriages to the X rails using (4) M3 x 8mm Button head bolts each.

Originally at https://railcore.dozuki.com/Guide/I)+Y+Rail+Installation/31