like a chew toy and then losing a drive
wheel, it tapped out leaving Grande
Tambor with a place in the finals.
Trilobite had a longer run to the
finals in the loser’s brackets. First, it
fought the drum version of RMR. This
proved more effective than the
overhead spinner version, but
Trilobite’s wedge got under the drum
most of the time. Something then
failed and RMR lost power to its drive
and weapon, and was counted out.
In the fight against Project
Terminus, its opponent’s blade failed
early and Trilobite spent the rest of
the fight pushing it around for an
easy judge’s decision. The next fight
against The Revenge of Dr. Super
Brain was a lot tougher.
The flipper had lost its flip but it
was still a fast well-driven wedge.
Trilobite only got the win by a narrow
The loser’s brackets semifinal was
Trilobite versus BOB. This was an
exciting fight with Trilobite harrying
BOB and BOB getting in some big
hits, until BOB lost first one drive
wheel then the other.
The final then was Grande
Tambor versus Trilobite. We tried a
different wedge attachment and had
more success — especially when
running upside down. It was a close
match, with perhaps Trilobite having
the edge until we lost drive on one
wheel. Grande Tambor took full
advantage and got in several quick
hits, leaving Trilobite hanging on the
edge of the area. We tapped out to
avoid any more damage (Figure 25),
making Grande Tambor this year’s
The Bot Hockey at Clash of the
Bots has slowly grown over the years,
and this was the first year where we
had enough hockey bots to form
three full teams without borrowing
bots from other teams. One of the
newcomers was Ply-able (Figure 26),
made largely from wood (though it
looks more like clear pine than ply!);
and Autodestruct (Figure 27) which
had competed as a 12 lb combat
robot about 10 years ago.
The Bot Hockey was played round
robin and was great fun (Figure 28)
for both competitors and the
audience. It made a few more
converts since some builders will be
adding to the numbers next year. The
matches were fairly close — especially
the one between Team Pneusance
and Team Scotch Pies which saw
numerous lead changes before Scotch
Pies grabbed the victory at the last
minute. Team Ice, however, won both
their matches so took first place.
Videos of all the fights can be found
on Mike Jeffries’ You Tube channel at
A quick presentation of the prizes
(supplied by sponsors: Finger Tech
robotics.com; Kitbots at
www.kitbots.com; and SERVO
magazine.com) wound up the event
in the late afternoon. SV
42 SERVO 09.2015
Personal CNC Mills
PCNC 1100 Series 3
Shown here with
Shown below is an articulated humanoid
robot leg, built by researchers at the
Drexel Autonomous System Lab (DASL)
with a Tormach PCNC 1100 milling
machine. DASL researcher Roy Gross
estimates that somewhere between 300
and 400 components for “HUBO+” has
been machined on their PCNC 1100.
Figure 26. Hockey bot — Ply-able.
Figure 27. Hockey bot — Autodestruct.
Figure 28. Bot Hockey.