2

Assembly of X axis

2 x Ø 8 mm x 370 mm smooth chrome rod

4 x M3 x 10 mm - DIN-912 class 8.8 black screw

2 x M3 x 16 mm - DIN-912 class 8.8 black screw

2 x M3 x 20 mm - DIN-912 class 8.8 black screw

1 x M3 x 25 mm - DIN-912 class 8.8 black screw

1 x M6 x 40 mm – DIN 912 class 8.8 screw (with threaded halfway)

2 x M3 - DIN 934 class 8 black nut

3 x M6 - DIN 934 class 8 black nut

1 x Printed X axis carriage B

1 x Printed left chain coupling X axis

1 x Printed endstop X axis

1 x GT2 pulley (20 teeth)

1 x GT2 6 mm x 1 m belt

7 x Linear ball bearing LM8UU

5 x Black strap, 100 x 2.5 mm

G003796

List of components for X axis

1Inserting the bearings

4 x 1 x 1 x

Linear ball bearing LM8UU

Left-hand X axis printed partLeft-hand end of X axis, where the Nema 17 motor of that axis will be supported.

Right-hand X axis printed partPart at the right-hand end of X axis, where the axis’ belt tensioner will be supported.

A B C

A

B

C

In order to insert the bearings, you will first need to file down the imperfections inside the hole in the printed part, which always form in the top layers. If the bearing still does not go in, cut the closed end of the part’s base, and carefully insert the bearing.Once the bearings have been inserted, it is advisable to insert a smooth rod, 8mm long, to ensure that the two bearings are correctly aligned.

1 2

1 x

Printed X axis tensioner for bearing B623ZZ

Pulley

M3 x 20 mm screw

M6 x 40 mm screw (with threaded halfway)

D

A

B

C

D

2Preparing the X axis tensioner

1 x 1 x 1 x

A B C

Assembly:

Insert the screw (D) in the tensioner’s hole until it is positioned as shown in figure 2. Affix the pulley with the screw (C), as shown in figure 4.

1 2

3 4

3Inserting the X axis tensioner

Assembly:

The purpose of the tensioners is to stretch or loosen the belt once it has been fit, in a convenient manner. File parts 1 and 2. The tensioner should slide perfectly inside the part which houses it (3).

Insert the set from step 1 into the set from step 2, and screw the nuts onto the end of the screw, tightening one against the other so that the nuts remain solidly fixed to the screw. Use a fixed spanner as a handle to slide the tensioner in a straight line.

1 x 1 x 3 x

Set from step 1

Set from step 2

M6 nut

A B C

A

B

C

1

5

2

6

3

4

Ø 8 x 370 mm smooth chrome rod

Linear ball bearing LM8UU

A

B

4Sliding the bearings onto the smooth rods

2 x 3 x

A B

1

2

5Preparing the endstop sensor

1 x 2 x1 x 2 x

A DB C

Printed endstop partPrinted endstop part to be fastened to the smooth rod in X axis.

EndstopEndstop mounted on a PCB with a LED indicator.

M3 nut

M3 x 10 mm screw

A

B

C

D

1 2

6Placing the endstop sensor on the smooth rod

1 x

A

1 x

B

Set from step 4

Set from step 5

A

B

Assembly:

Place the part assembled in step 5 on one of the rods of step 4, specifically on the one with only one bearing.

1

2

Inserting the smooth rods into the lateral parts

7

Assembly:

Insert the ends of the rods prepared in the previous step into the holes of the parts prepared in step 1.

1 x 1 x 1 x

Set from step 1

Set from step 2

Set from step 3

A B C

A

B

C

The length of the rod, once the lateral parts have been joined onto it, should be about 31 cm.

1

2

8Assembling the motor

Assembly:

Fix the chain coupling and the motor to the set from step 7 (E), using the screws (B and C).

1 x 1 x

Nema 17 motor

M3 x 16 mm screw

M3 x 10 mm screw

Printed left chain coupling X axisCoupling to hold the cable retractors on the part at

the left-hand end of X axis.

Set from step 7

A D

2 x

B

2 x

C

A

B

C

E

D

Guide the motor’s cable to the upper part

1 x

E

1 2

CB

Set from step 8

M3 x 25 mm screw

A

B

9

1 x

B

Assembly:

Insert the adjusting screw for the endstop sensor into the hole, as shown in figure 2.

Inserting the adjusting screw for the endstop sensor

1 2

1 x

A

Nema 17 motor Nema 17 bipolar stepper motor (2.5A 1.8

deg/step).

GT2 pulley (20 teeth)

A

B

10Inserting the pulley into the motor

1 x

B

Assembly:

Fix the pulley to the motor with the help of a 2 mm Allen wrench. Tighten the set screw against the chamfered part of the motor’s axis.

1 x

A

For this step you need a 2 mm Allen wrench.

1 2

3