OSHE Growbot Motor Encoders

OSHE Growbot Motor Encoders

Project developed by [Zach Arnold]

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Abstract

• 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

• Motor Encoders File Download

Encoder Connector

Item	Quantity	Price Per	Price Total
Encoder Connector.stl	1
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
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
Encoder Mount Motor Test Bench.stl	1
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 for fabrication of the OSAT

1. MOST Delta RepRap or similar RepRap 3-D printer
2. M3 Allen Wrench
3. M4 Allen Wrench
4. Pliers
5. Soldering iron

Technical Specifications and Assembly Instructions

Encoder Connector

1. Print the encoder connector and clean the infill - 15mins 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 this

Encoder Mount

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

Motor Testbench

1. Print the test bench parts - 4.5 hrs at 15% infill with Prusa MK3s

1. Provide directions for print/assembly - be detailed enough in your “how to” to ensure that someone could construct the device from your description. Consider the elegance of IKEA like instructions.
2. Include print time estimate
3. Include assembly time estimate
4. Including drawings or pictures of the device at stage of assembly at minimum. (http://www.appropedia.org/Special:Upload)
5. Consider video if appropriate

Common Problems and Solutions

• Include common mistakes/problems to avoid in building your OSAT and how to overcome them

Cost savings

• If your solution is not a low cost one then it is not really appropriate.

1. Estimate your costs
2. Find a commercial equivalent, cite it and put the [url in square brackets]
3. Calculate $ savings and % savings

Benefited Internet Communities

• [Open Source Hardware Enterprise | OSHE]
• Name and add links to at least 5 using single brackets around [url name]

References