- M3 内六角扳手
- M3 固定螺丝用的六角扳手（set screw allen key）
- M3 扳手
- M8 扳手
可选的(在标准的RepRap Mendel套件中并不包含这些)： 安装4个16毫米M3螺帽，4个垫圈和螺母（不包含上表中）在托架上，如图所示。这些现在不需要，但是在将来加强时需要。如果你现在这么做，以后你将不再需要把托架拆下来。
Step 2: Main X axis assembly
|Printed X end (motor)||1|
|Printed X end (idler)||1|
|428mm smooth 8mm rods (X)||2|
|8mm IGUS bearings||4|
|M3 nylock nuts||2|
Please note that there is an improvement to the design of the X motor end. It looks like this:
Start by fitting the IGUS bearing inserts to both ends:
You can curl them up so their ends overlap to insert them. Be careful.
Check their internal diameter by running one of the 8mm rods down them. If the rod is too tight (don't force it) put a 9.5mm drill bit shank in a vice, take the bearing inserts out, and slide the printed part over the drill to clean out the hole. Again be careful - you don't want to remove too much material and make a sloppy fit.
Repeat this process until the rod just fits and slides smoothly. It should not wobble from side to side.
With the tweezers fit the nylock nuts into their recesses in the idler end:
Pull the nylock nuts into their recesses with a screw if needs be.
Screw the two screws in by just three or four turns. Slide the smooth rods in so that they abut the screws and nuts.
Put the X carriage on the rods. Make sure to get it the way round shown in the picture.
Insert the rods into bearings while watching the opposite end of each bearing to make sure none of its balls get pushed out of their tracks. If they do, they can be reseated by pressing them back into the track with the tip of a chopstick. As a precaution, cover the area under your work with a tissue to catch any balls that might fall out.
Put the motor end printed part on the other ends of the rods. Make sure they slide right up to the closed ends of their holes:
Step 3: Fit the X motor
|NEMA 17 motor||1|
|Toothed belt pulley||1|
|M3 x 10mm set screw||1|
Later versions of Mendel have printed toothed-belt pulleys like this:
These simply push-fit onto the motor shaft - see below.
Use the screws and washers to mount the motor:
If you have a moulded pulley, screw the set screw into the toothed-belt pulley. Take care not to cross the threads - the plastic is not hard. Screw it in far enough to project into the hole down the middle, then back it off so it is no longer projecting. Blow any displaced pieces of plastic from the central hole. Put the pulley on the motor shaft with its hub outermost, as shown. Use the toothed belt to get it roughly the right distance along the shaft. Align the set screw with the flat on the shaft, and tighten it. Do not over tighten it - the pulley has an internal embedded nut, and over tightening will cause this to fracture the pulley.
If you have a printed pulley push it onto the shaft. It should be a tight fit, and you may have to tap it into place. Use a soft hammer, or a wood block. If you place an M8 nut against the pulley, you can tap the nut to place the pulley. Support the motor shaft, not the motor body, from the other end as you tap. You can secure it with a drop of superglue if you like (make sure the shaft is completely free of grease). Take care that no glue gets near the shaft's entry to the motor.
Step 4: The X belt idler
|35mm M8 threaded rod||1|
|M8 mudguard washer||1|
Fit the idler:
From the right the sequence goes:
- Mudguard washer
- Printed idler end