EShapeoko 1.4 Assembly: Z Motor

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Preliminary instructions

(TO DO: illustrations, table of parts, more detail.)

You need all the parts from Pack 10, the assembled plate from the previous step, the leadscrew, and the Z motor.

Motor

NEMA 17

Put the flexible coupler on the motor shaft, but do not tighten it yet.

Use the three long M3 screws (S3-50) to attach the motor to the Z motor plate, on the same side as the bearing. Use one longer and one shorter spacer on each screw (D3-12 and D3-15). Use the three holes at the corners of the plate; do not use the hole near the larger oval holes. There are no washers on the M3 screws.

NEMA 23

Put the flexible coupler on the motor shaft, but do not tighten it yet.

Put a washer (W5) on each screw (S5-70). Insert them through the three holes in the corners of the plate, from the side opposite the bearing. Put one longer and one shorter spacer on each screw (D5-16a, D15-12a). Offer the motor. Put a washer and a nut (N5) on each screw. Tighten the screws, holding the nuts with an open-ended 8 mm spanner.

Coupler

Insert the leadscrew (MLS1) or threaded rod (S8-150R) through the bearing and into the flexible coupler. If you have a leadscrew with a short narrow section at one end, install it with that end away from the motor. (That feature is not used in this machine.)

Push the screw it until it touches the motor shaft, then back out about 1 mm. Tighten the set screws on the bearing. If the bearing doesn't line up with the coupler, the bearing can be rotated inside its block: hold the plate and motor assembly firmly, and use the screw as a lever to force the bearing to move. Align the bearing with the coupler; you'll do more adjustment once you've mounted the MakerSlide. You may rotate the screw in the bearing if tightening the first set screw tends to pull the screw in or push it out.

Locate the flexible coupler as close to the bearing as possible (it's okay if it touches it). If you have a flexible coupler with jaws, turn it so that the set screw lines up with the flat on the motor shaft, then tighten the jaws first, then the set screws. If using an M8 threaded rod, loosen the jaws on the threaded rod one turn of the screw, then tighten the set screw again. (This helps center the rod in the coupler.)

If you have a flexible coupler without jaws, but with two set screws at each end, line one set screw with the flat on the motor shaft, tighten it, then tighten the other three.

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