04. Installation of the y-Belt

(1)2.5x75mm Hexagonal Screwdriver

(2) 5.0x100m Hexagon Ballpoint Screwdriver

(3) 0.8x4mm Insulated Screwdriver for Slotted Screws

(4) Precision Pliers

(5) Pliers Wrench

(1) Dowel Pin

(2) GT2 Toothless Pulley

(3) GT3 Belt

(4) xy-Belt Tensioner Insert

(5) 2x M3 Plastic Washers

(6) M3 Self-Securing Nuts

(7) M3 Washers

(8) M3x18mm Hexagon Socket Head Cap Screws

Take the xy-belt tensioner insert and widen one of the two holes on its side (e.g. using a 2.5x75mm Hexagonal Screwdriver).

Push a dowel pin through the newly enlarged hole. Push the dowel pin into the hole until it is only just visible inside the xy belt tensioner insert.

Place a M3 plastic washer on the dowel pin.

Now, place a toothless pulley onto the pin. Continue to push the dowel pin through until it reaches the end of the toothless pulley.

Place a M3 plastic washer on the toothless pulley and, using the pliers wrench, push the dowel pin as far as possible through the opening of the xy belt tensioner insert (Fig. 2).

Finally, place an M3 Self-Securing Nut into the designated slot. Press the nut completely into the slot.

Pay attention to the alignment. The blue circlip must point towards the pulley.

The xy-belt tensioner insert is now fully assembled.

Since you will also need the xy-belt tensioner insert for the x-axis, you can build it a second time.

Cut the GT3 belt with a clipper halfway through its length. Set aside one half of the belt, as it will be needed later when you're installing the extruder.

Turn your frame over and press the belt into it on the bottom half of the belt holder.

Use a flat-blade screwdriver to gently push the belt in, as the belt holder may break under increased pressure.

Wrap the belt around the pulley attached to the stepper motor and guide it further up through the belt holder.

Place the xy belt tensioner insert with the M3 Self-locking Hex Nuts facing up, into the y belt tensioner. Pull the belt through the xy belt tensioner insert.

Slide the xy belt tensioner insert all the way into the y belt tensioner so that both are flush at the front.

Insert a M3 washer into the front hole in the belt tensioner and push a M3x18mm cylinder head bolt through . Screw the bolt in until the xy belt tensioner insert is reached and 1-2 turns are in the self-locking nut.

Do not pull the xy belt tensioner insert in any further.

Now hold the belt against the belt holder to see how much of the belt you need to cut off.

After cutting off the excess, put the belt into the belt holder.

Move the y-carriage forward and look at the alignment of the belt.

Align the y-belt tensioner in such a way that the belt runs centrally through the opening in the belt holder. Then tighten the 2x M6x12mm Hexagon Socket Head Cap Screws on the y-belt tensioner.

Repeat the alignment procedure at the rear of the y-motor mount as well.

If necessary, you can adjust the belt looser or tighter with the M3x18mm Hexagon Socket Head Cap Screw in the belt tensioner.

The y-belt is now completely installed.

Continue with instructions 05. Assembly of the z-Axis