Model information
Description
A 19:1 gear reduction modification for the Robak 2. The author states this increases torque at the expense of top speed, providing higher acceleration, improved climbing capacity, reduced motor startup hesitation with sensorless setups, and increased energy efficiency at low speeds.
Assembly instructions: The author notes you will need to print the updated version of the TopDeck rear and remove the thin piece of plastic from the Chassis using pliers.
Fasteners:
Motor:
- 1x M4 grub screw
- 4x DIN 912 M3 20mm Socket Head Gears
- 2x DIN 912 M3 8mm Socket Head
- 1x 20mm M3 hex brass standoff
TopDeck:
- 3x DIN 7991 M3 16mm Countersunk Head
- 1x DIN 7991 M3 20mm Countersunk Head
- 2x DIN 7991 M3 12mm Countersunk Head
- 5x DIN 562 M3 Thin Square Nut
Bearings:
- 3x 15x10x4mm bearing
- 2x 10x5x4mm bearing
Files:
Sleeve.stl
MotorPlate.stl
Gear3_14T.stl
Gear4_38T.stl
Gear2_31T.stl
Gear1_13T.stl
TopDeckR.stl
Original text by the author on Printables
<h4>Update your Robak 2 with this 19:1 gear reduction mod, which increases torque at the expense of top speed. Benefits include:</h4><ul><li>Higher acceleration</li><li>Improved climbing capacity</li><li>Reduced motor startup hesitation with sensorless setups</li><li>More energy efficient at low speeds.</li></ul><p> </p><h5>You'll need to print the updated version of the TopDeck rear </h5><p><img class="image_resized" style="width:52.94%;" src="https://media.printables.com/media/prints/699847/rich_content/5e74c4b7-610d-40fa-894a-766c58525a17/2.jpg#%7B%22uuid%22%3A%226a6d5d81-f53d-49cd-befd-17d57b43c65c%22%2C%22w%22%3A1102%2C%22h%22%3A1011%7D"></p><h5>and remove the thin piece of plastic from the Chassis using pliers.</h5><p><img class="image_resized" style="width:57.09%;" src="https://media.printables.com/media/prints/699847/rich_content/57a1892c-b979-4a1d-91b9-10eea0754920/3.jpg#%7B%22uuid%22%3A%224e331366-fbbc-40a1-9fae-2e77f8689e3b%22%2C%22w%22%3A1223%2C%22h%22%3A914%7D"></p><p> </p><h5>Fasteners</h5><figure class="table"><table><tbody><tr><td><i>Motor</i></td><td><ul><li>1x M4 grub screw</li><li>4x DIN 912 M3 20mm Socket Head</li></ul></td></tr><tr><td><i>Gears</i></td><td><ul><li>2x DIN 912 M3 8mm Socket Head</li><li><strong>1x 20mm M3 hex brass standoff</strong></li></ul></td></tr><tr><td><i>TopDeck</i></td><td><ul><li>3x DIN 7991 M3 16mm Countersunk Head</li><li>1x DIN 7991 M3 20mm Countersunk Head</li><li>2x DIN 7991 M3 12mm Countersunk Head</li><li>5x DIN 562 M3 Thin Square Nut</li></ul></td></tr></tbody></table></figure><h5>Bearings</h5><ul><li>3x 15x10x4mm bearing</li><li>2x 10x5x4mm bearing</li></ul><figure class="image"><img src="https://media.printables.com/media/prints/699847/rich_content/a18395c1-f16e-4594-bb06-3ebd48c57520/assembly.jpg#%7B%22uuid%22%3A%228a9e8ad0-2633-4b9d-af30-36a88da04137%22%2C%22w%22%3A1645%2C%22h%22%3A818%7D"></figure><figure class="media"><oembed url="https://youtu.be/lrWFLDKa_W4?feature=shared"></oembed></figure><figure class="media"><oembed url="https://youtube.com/shorts/XPom63QiH3U?feature=shared"></oembed></figure>
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