▼This page was part of an MTU course MSE4777 OA and MSE4777 OB/MSE5777/EE4777/EE5777: Open-source 3-D printing
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Device data
Manufacturing files https://www.youmagine.com/designs/oshe-growbot-encoder-mounts
Hardware license CERN-OHL-S
Certifications Start OSHWA certification
Project data
Type OSHE growbot motor encoders
Authors Zach Arnold
Years 2019
Made Yes
Replicated No
Cost USD 100
OKH Manifest Download

This OSAT project was created to assist the senior capstone project for the Open Source Hardware Enterprise, OSHE Growbot. The parts designed are used in conjunction with Drew Vincent's, motor mounts for the Growbot. The Growbot project can be used to fulfill the OSAT 'Zero Hunger' goal.

Bill of Materials

Encoder Connector

Item Quantity Price Per Price Total
Encoder Connector.stl 1 4.7g $0.13
M4x20mm 1 $0.10 $0.10
M4 Nut 1 $0.15 $0.15
M3x8mm 4 $0.08 $0.32
Turnigy SK3 6374 Motor[1] 1 $83.82 $83.82

Encoder Mount for Motor Housing

Item Quantity Price Per Price Total
Encoder Mount Motor Housing.stl 1 11g $0.31
M3 Heat Insert 4 $0.20 $0.80
M2 Heat Insert 2 $0.15 $0.30
M3x10mm 4 $0.10 $0.40
M2x10mm 2 $0.07 $0.14
CUI AMT-102-V[2] 1 $23.63 $23.63

Motor Test Bench

Item Quantity Price Per Price Total
Motor Test Bench V3.stl 1 42g $1.17
Encoder Mount Motor Test Bench.stl 1 10g $0.28
M3 Heat Insert 2 $0.20 $0.80
M2 Heat Insert 2 $0.15 $0.30
M4x8 4 $0.09 $0.36
M3x10mm 4 $0.10 $0.40
M2x10mm 2 $0.07 $0.14
CUI AMT-102-V 1 $23.63 $23.63
Turnigy SK3 6374 Motor 1 $83.82 $83.82

Tools needed

  1. MOST Delta RepRap or similar RepRap 3-D printer
  2. 2mm Allen Wrench
  3. 2.5mm Allen Wrench
  4. 3mm Allen Wrench
  5. Pliers
  6. Soldering iron

Technical Specifications and Assembly Instructions

Encoder Connector (5 minutes to assemble)

  1. Print the encoder connector and clean the infill - 35mins with 50% infill with Prusa MK3s
  2. Push the M4 bolt into the middle hole, so the bolt head is recessed
  3. Attach nut on the other side
  4. Attach the 3D printed piece onto the motor using 4 M3 bolts
  5. Should look like the image below
Fig 1: Encoder connector attached to the motor.

Encoder Mount (10 minutes to assemble)

  1. Print the encoder mount for motor housing - 50mins at 15% infill with Prusa MK3s
  2. Use the soldering iron to insert the heat inserts
    • 2 M2 Heat inserts go into the small holes on the large front face
    • 4 M3 Heat inserts go into the holes on the edges
  3. Attach the encoder to the mount using 2 M2x8 bolts
  4. Finally, use this assembly within Drew's motor mount, OSHE Growbot Mounting Units
  5. Should look like the image below
Fig 1: Drew's motor housing with encoder installed.
Fig 2: Upclose encoder mounting.

Motor Testbench (40 mins to assemble)

  1. Print the test bench parts - 4.5 hrs at 15% infill with Prusa MK3s
  2. Follow the encoder connector directions
  3. Follow the encoder mount instructions with 2 M3 inserts instead of 4
  4. Attach the motor to the test bench mount using 4 M4x8 bolts
  5. Attach the encoder mount onto the test bench using 2 M3x8 bolts
  6. Should look like the image below
Fig 1: Testbench completed.

Common Problems and Solutions

Cost savings

Benefited Internet Communities

References

  1. ↑ HobbyKing Motor: https://hobbyking.com/en_us/turnigy-aerodrive-sk3-6374-149kv-brushless-outrunner-motor.html
  2. ↑ DigiKey Encoder: https://www.digikey.com/product-detail/en/cui-devices/AMT102-V/102-1307-ND/827015
Page data
Keywords 3D printing, farming, osat, oshe, oshe growbot, rotary encoder
SDG SDG02 Zero hunger, SDG08 Decent work and economic growth, SDG09 Industry innovation and infrastructure
License CC-BY-SA-3.0
Organizations Michigan_Tech's_Open_Sustainability_Technology_Lab, MY4777, MTU
Language English (en)
Related 0 subpages, 0 pages link here
Views 163 page views (analytics)
Created December 4, 2019 by Zach Arnold
Last edit June 18, 2024 by Felipe Schenone
Cite as Zsarnold (2019–2024). "OSHE Growbot Motor Encoders". Appropedia. Retrieved October 3, 2026.
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