Ultimaker rev.3 assembly: X & Y motors

Mechanical assembly of the Ultimaker revision 3 (click for an overview)

1.1 Frame

1.2 Motors

1.7 Mounting the electronics

What you'll need

Time needed:
About 20 to 40 minutes.

Tools needed:

Hex key (2mm)
Hex key (1.5 mm)

**Parts needed in this section**
Qty.	Description	Notes
3	Motors with simple round axles	the one with the short wire is for the Z-axis, the 2 other for X and Y. The fourth one is for the extruder later.
1	spacer pack	For the X-Y-motor.
8	Bolts 20 MM	For the X & Y motors.
4	Bolts 10 MM	For the Z-motor.
2	Short timing belts	For the X & Y motors.
8	Washers	Should fit on the bolts
2	Pulleys	For the X & Y motors.
1	Resiliert coupling	For the Z-motor.

Step 1: The X and Y motors

**Parts needed in this section**
Qty.	Description	Notes
2	Motors with simple round axles	The one with the short wire is for the Z-axis, the 2 other for X and Y.
2	Pulleys	For the X & Y motors.
2	Short timing belts	For the X & Y motors.
8	Bolts 20 mm	For the X & Y motors.
8	Washers	Should fit on the bolts.
8	Black spacers	For the X and Y motors.

For this step you have to take 2 motors with long wires.

1. Prepare the two motors by placing the 5mm internal diameter pulleys on the two motors. Keep a tiny gap in between the motor and pulley and fasten it very tightly.

Because of the tiny gap, the pulley should rotate freely.

2. Put 4 bolts (20mm) with washers through the holes on the outside (not engraved) of the BACK panel on the place where the motor needs to be mounted. Next, take 4 black spacers and place each one around one of the bolts (on the engraved side of the frame).

3. Take one of the motors and lay the timing belt around the pulley.

4. Put the motor in place. Make sure the wires of the motor, the wires of the limit switches and the timing belt don't get stuck!

5. Hold the motor with the timing belt and tighten it just a little bit with the 4 bolts, so it can slide up and down a little. These bolts will be tightened later when all axes are in place.

Mounting the washers

You should use 4 washers on the bolts in the X and Y motors to ensure that the motors will not slide upward. This helps maintain belt tension for the short belts. If you somehow do not have 3mm washers in the nuts and bolts pack, you can use any 3mm (or 1/8 inch) washer from the hardware store.

6. Do the same for the Y motor and mount this one to the LEFT panel. Make sure you push the cables into the corner before mounting the Y motor.

7. Push the wires through the cable ducts and out through the bottom panel.

Step 2: The Z-motor

**Parts needed in this section**
Qty.	Description	Notes
1	Motors with simple round axles	the one with the short wire.
4	Bolts 10 MM	For the Z-motor.
1	Resiliert coupling	For the Z-motor.
1	Hex key	The small one, used for tightening the Resiliert coupling.

1.Take the third motor (with the shortest wires) and mount on the underside of the bottom panel. Use 4 bolts of 10mm. Make sure that the wires stick out towards the center of the bottom panel.

Because there is no clearance between the motor and the back, be sure to force the motor face to seat flat on the bottom.

2. Take the Resiliert coupling (you can find it within the little white package in the Pulley Pack) and place it on top of the motor. The Resiliert coupling has two different sides, a 5mm and an 8mm - you need to put the 5mm side on top of the motor.

3. Use a screw driver to set the Resiliert coupling at the right height and tighten the small screws at the bottom of the Resiliert coupling with the hex key.