7. Installing the Y Carriage - GarryBooker/E3_Assembly GitHub Wiki
Original PDF: pages 43, 44, 45, [[46|p46]], 47, 48
Parts for gantry assembly include: * Engraver assembly * Y Carriage assembly * 2 Med length 8 m rods * 2 Y rail stops * 4 M4X25 screws * 4 M4 nuts * 1 home switch * 2 M2.5 x 16 screws * 2 M2.5 nuts * 1 Spiral wire wrap * 5 Nylon ties
Place 1 of the Y rail stops with and retain with 2 M4 x 25 screws and nuts. Please note the orientation. The stop should cover the ends of the Y rail keeping them in place.
Gently insert the top rod thru the gantry thru the Y rail supports and into the gantry side.
Gently place the Y carriage onto the rods so that the SG20U bearings are riding on top of the top Y rail. Then gently insert the bottom Y rail thru the gantry and over the bottom SG20 bearings thru the Y rail supports and into the gantry side.
Tighten both SG20U bearing nuts on each side one full turn in the slotted holes on the engraver mount.
STOP The SG20U bearings should roll firmly. There should be a small amount of preload. Check the top 2 bearings to ensure that they are snug up against the 8 mm rail. The bearings should move along the rail when rotated by hand. If any of the bearings rotate without wanting to move on the rail: • Remove both of the Y rods • Loosen the 2 nuts on the slotted holes on each side and slide the SG20U bearings upward • Snug the SG20U bearing nuts • Repeat 1 thru 4.
Place the remaining Y rail stop to gantry side and retain each with 2 M4 x 25 screws and nuts. Please note the orientation. The rail stop should cover the ends of the rail keeping them in place.
Place the Z home switch to the side Z mount and retain with 2 M2.5 x 16 screws and nuts.
Spiral wire wrap and nylon tie the DeWalt and wire wrap as shown
STOP To avoid false triggering of the X, Y, and Z home switches caused by electrical noise of the stepper motor wires, it is best to spirl wrap the home switch wires about every 5 or 6 turns as shown above and below.
STOP Ensure that the Y carriage is free to move to each end of its travel without binding the bundled wires.