Lesson Plan
Materials
Need materials? Purchase the Barnabas Robot Arm at our e-store.
Classroom sets available. Contact us at info@barnabasrobotics.com to inquire.
Lesson Overview
In this lesson we will assemble the claw and add pinchers.
Tutorial Video
Instructions
STEP 1. Build Claw Motor Assembly
Build claw motor assembly using:
- 1 x Servo Motor
- 4 x Wood Pieces
- 4 x M3x10 Screws
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| Side 1 | Side 2 |
|---|---|
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STEP 2. Attach Pinchers
Build left pincher assembly using:
- 1 x M3x10 Screw
- 3 x Wood Pieces
This pincher will be driven by the claw drive gear.
IMPORTANT: Do not overtighten. Make sure that the joint can move easily. If it is too tight, your motors will not be able to move the joint during robot arm operation.
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Attach left pincher using:
- 1 x M3x12 Screw
- 1 x Wood piece
You’ll need to be careful to slide the wood piece in between the left pincher assembly like meat in a sandwich and then align the holes so that the screw can go through all of the pieces.
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| Top View | Bottom View |
|---|---|
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Attach right pincher using:
- 1 x M3x10 Screw
- 1 x Wood Piece
When inserting the right pincher, align the gears so that the claw can open and close all the way.
IMPORTANT: Don’t tighten the screw all the way. Be careful to make sure that the screw does not protrude past the wood surface (see below in the red circle) If it does, the claw will get stuck when the drive motor tries to move it.
| Top View | Make sure screw does not protrude! |
|---|---|
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