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The basic pieces.
The inner structural rails are made from half inch black
polycarb (obtained from the scrap bin of a local plastics
place). The sides are 3/8 aluminum and the "drumette"
is a chunk of aluminumm pipe.
I cut the pieces with a jigsaw and then went over to my
friend Pete Covert's place to finish them off on his mill. |
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Baseplate added and
some components placed on the bot for test-fit. The
drive uses #35 chain on plastic sprockets. 3.5" rear
wheels, and 3" front wheels. |
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At this stage, the
drumette is finished, and the other weapon components
are mounted. The weapon axle is hollow 20mm shafting
and the uprights were cut at DC Waterjet. It would be
impossible or at least very time consuming to make pieces
like that myself. Also note the piece of polycarb
cut to act as rear motor supports. A piece like this
stops the motors from wanting to bend on impact, which can
harm the gearboxes. |
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Fully-assembled drive
train. By putting the motors in this configuration I
was able to shrink Sunflower's width from 16.5 inches to 13
inches, though it made the left side a little more
complicated. The other interesting feature here is
the location of the battery pack. I wanted to use
every cubic inch in this bot and the space between wheels
struck me as wasted so I put the batteries there!
|
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All of the electronic
components are added in this picture. |
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Except for the top and
a paintjob, the bot is finished. |
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Sunflower has an
alternate mode I can use if I am terrified of a particular
horizontal spinner -- the drumette comes off and is replaced
by a "bash bar" made from 3/4" thick aluminum. |
