26 SERVO 10.2017
The second planned significant
change is the weapon motor. The
NTM 3536 910KV worked
wonderfully, and the beater geometry
was out-hitting faster spinners.
Saskatchewan being spinner-crazy, I
think spinning 15k+ RPM slower than
some, it might be an issue. It also
never got warm, so it makes
much more power than
I'll be switching to a new 1400KV
2836 Prop Drive V2 (the replacement
for the NTM line) to shed some
weight, free up some space for the
drive motor battle hardening, and
increase the beater speed to around
21K RPM instead of the previous 14K
RPM. This should help with spinner to
spinner hits, but can still run it
slower for fighting non-spinners.
I'll also be epoxying the
rotor and stator for durability
after damaging a magnet at
Motorama. Thankfully, I had
the rotor from the spare slower
800KV motor to throw on it
without reducing performance.
So, there you have it. This is
the last installment going over
the entire build of Insani Ti --
from design, to construction, to
actually competing. It was a
very long journey to get to this
point, but the 4th place finish at
Motorama made it all worth it.
I know this isn't a feasible
design for many, but I believe
with different materials and
construction techniques, several
of the design elements can be
incorporated into a more basic design.
Using pencil and part to design and
basic hand tools to construct, you can
be just as competitive.
I hope this is helpful to many
readers, but more importantly,
encourages you to get out and build a
bot and compete. You'll never learn as
much watching as actually doing it.
to the back of
Bot on a Budget —
Finding the Balance
Between Quality and Cost
With classes over and summer upon us, it was time for Black Lightning Robotics to
take a second shot at robot building.
Frequent readers may remember that
our previous attempt to build a cheap
and cheerful Beetleweight resulted in
Phantom: a glass-cannon-direct-drive-epoxy-fastened-Lexan-armored
nightmare of an overhead bar spinner
which spun for about six seconds
before being reduced to a WWII
gimmick held together by duct tape.
This was camouflage duct tape, of
course, chosen to hide our shame.
Many lessons were learned from
that experience, though, and we did
quite a bit more research for the
design of Phantom II.
Thankfully, the expensive electrical
components had survived CIRC last
year (except for the weapon motor),
so we were already ahead with this
build. That left us with just the
● by Nik Buchholz