In this part, we will build the “Module 2” of the BCN3D Moveo robot arm. The manual did not show us how we can install the belt at the end. In this post, there is a chapter specifically on this topic. So, you can have an easier installation than me. Unfortunately, I had a couple of bad prints with the 3D-printed part T2M1D and T2M1l. I had to modify them afterwords. If you want to know what I did exactly, stay tuned.

Steps for this Part from the BCN3D Manual

Building

Resources

BOM (Click me)


BOM ID Quantity Name
17 6 Bearing 4 x 13 x 5
19 2 M4 Brass inserts
20 6 M3 Brass inserts
21 2 Bearing 8 x 22 x 7
33 2 Breco belt T5, 16mm width, L 44.8cm
34 2 Pulley T5, Bore 10mm, 14 tooth, 17mm width
35 2 Nema 23 stepper 3Nm 4,2A Ø 10 mm shaft
36 1 Chrome steel smooth bar 140mm M8
101 6 Screw M3 x 10
105 2 Screw M3 x 25
111 4 Screw M4 x 40
114 8 Screw M5 x 14
117 2 Screw M4 x 20
118 2 M3 Nut
119 6 M4 Nut
120 4 M4 Locknut
121 8 M5 Locknut
205 1 2M1
206 1 2M2M
207 1 2M2H
208 1 T2M1D
209 1 T2M1I
229 2 T2M1

Parts needed for this step

If your print has a better quality than mine, no tools are needed. Expect from the seconds glue. The brass insert that I bought have a thinner outside diameter, so I had to glue them in.

Tools

  • 8 mm drill
  • 6 mm drill
  • seconds glue
  • Tongs
  • HX1, HX3 and HX4 Screw driver

Step 1: Assembly 2M2

In this step, we’ll build the main rotary axis. The Manuel is straightforward. Important are the M4 nuts. If you forget these in this step, you have to disassembly the hole module 2 to mount module 3 in the next part on it. You will only notice that you forgot the nuts if you want to mount module 3 on it.

Something that I was thinking during assembly of this part was that the screws are very long.

2M2 long screws

You can easily use M4x30 or M4x25 screws to mount the parts together. The finish result should look like the image below.

Result after step 1

Step 2: prepare the belt stretcher

In this step, I had to overcome a few hurdles.

Step 3: Mount the engines

Step 4: put everything together

Step 5: The belt

Step 6: Add the Cover

Let’s begin with the brass inserts. They have the correct inner diameter. Unfortunately, they do not have the right outer diameter. The M3 inserts are too big, and the M4 inserts are too small for the holes in the 3D-Model.

Result Part 8