Simple Bots: Scoop
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There are so many Simple Bots that sweep and scrub, that I felt it only appropriate to make one that picks up after them. Scoop does just that. It pushes itself around and systematically scoops up whatever lies in its path. Well... maybe "systematically" is too strong of a word to use in describing it, but it definitely gets an A+ for effort. If there is one thing that Scoop Bot wants to do more than anything else in this world, that is scoop. There is not a man, woman, ice cream server, or investigative journalist alive, quite as dedicated to scooping.
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Go Get Stuff
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You will need:
(x2) continuous rotation servo modified for direct drive**
(x1) 3 x AA battery holder
(x3) AA batteries
(x1) dust pan
(x1) 12" aluminum ruler
(x2) casters
(x10) 4-40 x 3/8" nuts and bolts
(x8) 10-24 x 3/4" nuts and bolts
(x8) rubber feet
(x1) Bic round pen
(x1) assorted zip ties
**Modify your servos for direct drive here
(Please note that some of the links on this page contain affiliate links. This does not change the cost of the item for you. I reinvest whatever proceeds I receive into making new projects.)
Attach
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Firmly zip tie the servos to the handle of the dust pan such that they are pointing out opposite each other.
Remove and Drill
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Remove the servo horn from the servos.
Drill 1/8" holes into each of the corners of the servo horn.
Cut
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Cut two 3-1/2" sections of ruler.
Mark and Drill
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Place the servo horn along the edge of one of the sections of ruler. Make a mark in each of the four mounting holes. Repeat for the second section of ruler.
Drill 1/8" holes where each of these marks were placed.
Drill Again
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Take each section of ruler and place a centered mark 1/4" from the edge on the side that has not been drilled yet.
Where this mark was made, drill a 1/4" hole.
Reattach
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Reattach the servo horns to the servos.
Fasten
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Fasten the ruler sections to the servo horns using 3/8" nuts and bolts.
Remove the Wheel
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Remove the wheels from the caster brackets by unscrewing the nut that is holding them in place.
Spacers
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Take apart a ballpoint pen.
Cut four 1/2" spacer tubes out of the pen's body.
Caster Time
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Fasten the caster mounts to each of the aluminum brackets by using the spacers you just made to center the aluminum bracket on the caster shaft.
Rubber Feet
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Drill Some Holes
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Also, drill another 3/16" hole nearby to pass through all four of the motor's wires.
Attach
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Wire It Up
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Connect the remaining two black and red servo wires togethe,r as well.
Finally, attach the first pair of wires to the red wire of the battery pack.
Attach the other pair of wires to the black wire.
Note: if your feet are spinning backwards when you power it up later, reverse the connections of the battery wires.
Tidy It Up
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Zip tie all of the wires neatly together, making certain that none of the exposed solder joints can touch together and short the bot.
Power It Up
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Put batteries in and watch Scoop do what it does best!
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