OHAI: Open Hardware Assembly Instructions

1 Gather Materials

1x- [EL-MT0084] LDO Gear Ratio Motor 5:1
1x- [EL-SW0022] Switch Basic 3A 125V
1x- [HD-BL0023] Single Sided Neoprene Belt 866mm
4x- [HD-BT0012] M3x6 Set Screw
2x- [HD-BT0107] M2x10 SHCS, Black-Oxide
4x- [HD-BT0116] M3x10 FHCS, Black-Oxide
8x- [HD-BT0148] M3x10 BHCS, Black-Oxide
1x- [HD-BT0151] M5x20 SCHS, Black Oxide
1x- [HD-BT0158] M5x12 BHCS, Black-Oxide
2x- [HD-BT0185] M3x16 SHCS, Black-Oxide
1x- [HD-BT0196] M5x25 SHCS, Black-Oxide
1x- [HD-MS0033] GT2, 16 Teeth, timing pulley
5x- [HD-MS0411] Premium Two Side Rubber Sealed Bearing
2x- [HD-NT0001] M3 Locknut
1x- [HD-NT0057] M5 Locknut
2x- [HD-RD0061] 10 mm Smooth Rod SST 405mm
2x- [HD-WA0012] M2 Steel Flat Washer
10x- [HD-WA0038] M3 Washer, Black-Oxide
3x- [HD-WA0040] M5 Washer, Black-Oxide
1x- [PP-FP0156] Z Upper Top Plate
1x- [PP-GP0141] X End Idler Pro/WE
1x- [PP-GP0357] Z Upper Right Pro/WE
1x- [PP-GP0394] Belt Anchor Pro/WE
1x- [PP-GP0698] Z Lower Right Pro/WE
1x- [PP-MP0225] YZ Idler Pro/WE

Gather Materials

2 Prepare the Z Lower Right

Place 1x LDO geared stepper motor [EL-MT0084] inside the Z lower right motor jig, then slide 1x 16 teeth timing pulley [HD-MS0033] on the motor shaft making sure one of the set screws on the pulley is aligned with the flat side of the motor shaft.

While pushing down on the timing pulley torque the set screws to 3 in*lb.

Using the bearing punch and 1x rubber sealed bearing [HD-MS0411] and Z lower right [PP-GP0698] press the bearing into the Z lower right.

Then align the motor with the Z lower right so that the connector is on the opposite side as the smooth rod holes.

Before fully sliding the motor into the Z lower right, feed 1x GT2 Belt [HD-BL0023] through the hole between the two smooth rod holes and loop it around the timing pulley.

Then push the motor so that the shaft goes through the bearing while making sure the connector is on the opposite side of the smooth rod holes.

Once the motor is placed inside the Z lower right secure using 4x M3x10 BHCS [HD-BT0148] with M3 washers [HD-WA0038].

Now using 1x YZ idler [PP-MP0225], 1x M5x20 SHCS [HD-BT0151] and 2x rubber sealed bearings [HD-MS0411] assemble the YZ idler around the end of the belt making sure the motor is on the opposite side of the motor.

Secure the timing pulley to the motor

Make sure the Z lower right is flat

Use the bearing punch to press the bearing into the Z lower right

Place the motor inside the Z lower right with the belt around the timing pulley

Use 4x HD-BT0148 w/ HD-WA0038 to secure the motor

Install YZ Idler making sure the head of the bolt is on the other side of the motor

3 Prepare the X End Idler

Place 2x M3 lock nuts [HD-NT0001] inside the two nut traps in the X end idler. Then using 2x M3x20 SHCS [HD-BT0007] with washers [HD-WA0038] secure the lock nuts. Make sure to leave screws loose.

Then thread 2x M3 set screws [HD-BT0012] into the two brass inserts on the left and right side of the X end idler.

Place 2x rubber sealed bearings [HD-MS0411] inside the idler jig, then place a M5 washer [HD-WA0040] on both sides of the bearings.

Then place the X end idler over the idler jig and secure the bearings and washers with M5x25 SHCS [HD-BT0196] and M5 locknut [HD-BT0057].

Place 2x HD-NT0001 inside the nut traps

Fasten 2x HD-BT0007 with washers into the nuts making sure to leave them loose

Bring the screws to the end of the locknuts

Thread 2x HD-BT0012 into the two brass inserts on the left and right side

Place two bearings and washers inside idler jig

Fasten the bearings to the X end idler

4 Prepare the Z Upper Right

Take the Z upper right [PP-GP0357] and place it on the Z upper top plate [PP-FP0156] making sure the square hole aligns with the three holes in the Z upper top plate.

While holding the two parts together flip them over so that the Z upper top plate is on top, then secure them together using 4x M3x10 FHCS [HD-BT0116].

Now take the switch [EL-MS0022] and place it on the table as shown in [reference#1] then take the base of the switch and bend it upwards so the tabs are bent to 90 degrees.

Verify that the button is on the right side when the tabs are on the top and pointing up. If the button is on the left bend the tabs the other way.

Now slide 2x M2x10 SHCS [HD-BT0107] with M2 washers [HD-WA0012] through the side of the switch that the tabs pointing.

Then fasten the switch to the Z upper right.

Place the Z upper right on top of the Z upper top plate

While holding both parts flip them over and secure them together

[reference#1] Prepare the switch with 2x HD-BT0107 with M2 washers

Install the switch to the Z upper right

5 Assemble the Z Axis Right

Using the reaming tool, ream both smooth rod holes on the Z lower right.

Then slide 2x smooth rods [HD-RD0061] into the smooth rod holes.

Now take the X end idler and slide it onto the smooth rods making sure the bearings are on the opposite side of the flat side of the Z lower right

Take the Z upper right and slide it onto the end of the smooth rods with the flat side on the same side as the flat side of the Z lower right.

Then pull the YZ idler up to the Z upper top plate and attach it using 1x M5x12 BHCS [HD-BT0158] with a M3 washer [HD-WA0040]. Then install the 2x M3 set screws [HD-BT0012] in the two holes next to the idler.

While sliding the X end idler along the smooth rods tighten the two screws that are on the backside of the X end idler to secure the bushings.

Then take the belt anchor [PP-GP0394] and using 4x M3x10 BHCS [HD-BT0148] with M3 washers [HD-WA0038] attach the belt to the X end idler.

Ream the two smooth rod holes on the Z lower right