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If you can count on only one thing, it would be a ruler. Now, don't get me wrong. I am not talking about supreme despots for life, or anything of that...
You will need: (x1) continuous rotation servo modified for direct drive** (x1) 18" aluminum ruler (or longer) (x2) small plastic container (x2) 2" - ...
Use a hacksaw and cut the ruler into two 9" sections. (The convenient thing about cutting a ruler is that it comes pre-measured.)
On one of your 9" sections, make two cuts 3/4 of the way through the ruler at 1/2" from the edge and 2-1/8" from the edge. Place the ruler in a bench...
Place your servo motor into the slot you just cut and use a pencil to mark where its mounting holes are. Remove the motor and drill through your mark...
Drill a 1/4" hole that is 1/2" from the edge of the the cut ruler section. Repeat on both. (Obviously, on the piece that you have already worked on, ...
Detach your servo horn from your motor (the gear-looking object). Use your servo horn as a guide to both mark and drill 1/8" holes through the sectio...
Drill an 1/8" hole, centered upon the section of the ruler with the motor mount, that is 5" from the edge with the mount. Drill a 3/16" hole upon the...
Mount your motor to the ruler, using nuts and bolts. Make sure that the motor mounting holes are on the same side of the ruler that the mounting brack...
Use diagonal cutters to remove two inches worth of teeth from one side of your comb. However, I found it is beneficial to leave a few teeth on right a...
Pass a screw through the hole you drilled in the step prior. Once it is passed through, place 2 - 4 washers on it. The point of these washers is to p...
Remove your switches' mount nut and insert it into the 1/4" hole on the servo horn section of ruler, Make certain to pass it through, such that the sw...
Mount the standoff to the servo horn section of the ruler such that it is facing inwards in the same direction as the lever switch. The comb will res...
Take your ballpoint pen and remove the ink cartridge such that you are left with a hollow tube. With a razor blade, cut down on the tube creating two...
Take your two casters and remove the wheels. Set the wheels aside for some later project.
Center the caster frame atop your plastic container. Use the holes in the caster as guides for drilling 1/8" holes in the lid of the container. Zip ...
On one of the plastic container lids, drill an 1/8" hole in the corner. Place the battery holder inside and pass the power wires through the hole. (...
Using the caster mounting hardware and the pen spacers, attach the rulers to the plastic containers. Basically, the ruler should have a pen spacer on...
Before you start, make sure at least one battery is not in the battery holder or the motor will turn on, making your job here very difficult. Solder ...
Basically, it works by reversing the direction of the motor each time the comb hits the switch, which, in turn, forces its "feet" to slide back and fo...
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