2. Y axis

3D printed parts

Necessary fasteners

Milled aluminium Y-carriage

Smooth and threaded rods (Smooth rods are the medium lenght ones from package [if you have only 2 lengths, use shorter ones])

Felt spacers

Y-axis endstop

Y-axis motor (longer one)

13/17mm spanners

3.6mm flathead screwdriver

Needle-nose pliers

2.5 and 1.5mm hex spanner

Y-axis-corners

Y-belt-holder

Y-motor-holder

Y-idler

Screw the nuts and place washers and Y-corners on the threaded rod as shown in the picture

Ensure a 80mm distance between nuts

The 2 nuts after 80mm gap have to be tightened against each other (counter-nut)

Repeat Step 4 to get a second complete Y-axis rod.

Screw the nuts and place washers and Y-idler on threaded rod as shown in the picture

Screw the nuts and place washers and Y-idler on threaded rod as shown in the picture

Y-axis stage front

Insert Y-axis stage front and back in to Y-axis side elements and lock it with washers and nuts like in the picture

Prusa i3 frame

Y-axis stage

Insert the Y-axis stage into the frame as close to Y-corners as possible

Adjust and tighten the M8n nuts

Rotate the Y-axis stage and repeat

Insert the 8mm smooth rod into the Y-axis stage.

Adjust and tighten the M10n nuts

Remove the 8mm rods

Y-carriage

2.5x100mm ziptie

LM8-UU linear bearing

8mm smooth rod

Insert zipties into the Y-carriage as shown on picture

Place the linear bearings in cutouts

Use pliers to tighten the zipties

Cut the excess ziptie with pliers

Place Y-belt holder on the Y-carriage as shown on picture

Using M3x10 screws, M3n nuts and 2.5mm hex spanner screw the Y-belt holder to Y-carriage

Insert the 8mm smooth rods into the linear bearings on Y-carriage

Insert the assembled Y-carriage into the Y-axis stage

Insert tiptoes into holes in Y-corners

Using pliers, tighten the zipties as shown on picture

M3x25 screw

M3w washer

623h bearing housing

M3nN nylock nut

To tighten the Y-idler, use the pliers and 2.5mm hex spanner

Y-axis motor

M3x10 screw

Using the 2.5mm hex spanner, tighten the motor to 3D printed part

Make sure that there is a small gap between motor and Y-carriage

If the gap is not even, adjust the bottom nuts

Insert the ziptie in the Y-endstop as shown in picture

Place the Y-endstop on the Y-axis stage as shown on picture

Using pliers tighten the ziptie on the endstop as much as you can

Cut off excess ziptie and discard

Roll the Y-carriage until it hits the endstop

Check the gap on the dual bearing side of Y-carriage between bearing and Y-corner (should be around 2-5mm)

If the gap is too large or bearing is hitting the Y-corner, move the endstop to compensate

Ziptie the cables to the threaded rods as shown in picture

Cut and discard excess ziptie

Insert the Y-GT2 belt (shorter one) in the the Y-belt holder as shown in picture

Adjust the Y-idler as shown in picture (623h bearing housing should be in axis with the belt)

Place a GT2-16 pulley on the Y-motor shaft as shown in picture

Tighten the screws in the pulley

Using the pliers, tighten the belt and insert it into the Y-belt holder

Using a flathead screwdriver, move the belt to the end of the Y-belt holder cutout

If necessary, use pliers to cut the remaining part of the belt

If necessary, grab the end of the belt with pliers, twist it and insert it in the Y-belt holder cutout as shown in the picture

Place assembled Y-axis on a flat surface

Check if every corner is touching the ground

If some corner is in the air, try twist the axis slightly

Stick the felt pad on each Y-corner

Congratulations, you have assembled Y-axis !

You can continue by assembling X-axis by click on following link

3. X axis