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
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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.
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Gently insert the top rod thru the gantry thru the Y rail supports and into the gantry side.
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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.
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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.
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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.
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Place the Z home switch to the side Z mount and retain with 2 M2.5 x 16 screws and nuts.
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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.