The 3rd module does not come with bigger issues. It was quite convenient to set everything up. In the last part, I made a mistake where I glued the M3 brass inserts into the hole. Now I knew that there are heat inserts. And with some head, it is straightforward to install them. Although I have to glue the M4 inserts in place because the inserts are too small for the hole.

Preparation

BOM for part 3

BOM ID Quantity Name
8 1 Nema 17 R1:5 Motor
13 1 Smooth bar 114 mm
15 3 Bearing 8 x 22 7
17 3 Bearing 4 x 14 x 5
20 6 M3 inserts
21 1 8mm Pulley
231 1 Rod bar L 42 mm Diameter 8 mm
24 1 Coupling 8mm - 5mm
43 1 Nema 17 Stepper Motor 42BYGHW609, (1.7A, 1.8°, 4000 g·cm)
101 8 Screw M3x10
102 6 Screw M3x12
107 7 Screw M3x40
110 4 Screw M4x16 mm
118 7 M3 Nut
119 1 M4 Nut
123 1 Screw M4x20 mm
210 1 3M1
210A / 233 2 1 3M2C
211 / 234 2 1 3M2CC
212 1 T3M1
230 2 T3M1
  1. This should be a threaded rod.

  2. These are modifight versions for the stepper 42BYGHW609. Please check out this post 2

All items for this part

Tools

  • HX4 Screw driver
  • HX2 Screw driver (for the pulley)
  • Solder Iron

Step 1: Mount 2M1

The screws in the 1M1part a lose. I had to hold them with some tooth sticks into place. Then I mounted the 2M1 part on top of this.

Result after step 1

Step 2: prepare the belt stretcher

This time, my printer could handle the hexagon hole. I did not have to modify the printed piece.

Result of step 2

Step 3: Mounting the belt stretcher

The M4 screw inserts didn’t fit here, either. I had to glow them in again.

In the future, I have to find the correct inserts but for now, this is the way I’ll do it

Step 4: 3M2 Assembly

We have edited the 3M2 parts (3M2C & 3M2CC) to fit our stepper motor inside. For the detailed changes, have a look at hit blog post:

Unfortunately I have not time to finish this week’s blog post in time. I take this week off and I will describe the second half of the post in next weeks blog entry.