Theatre Design & Technology - Summer 2001 - 40
tec h
EXPO
2001
THE DANCING BED
by Tom Korder, Randy deCelle, Tommy Thompson
Krannert Center for the Performing Arts, University of Illinois
Last February we were awarded a $15,000 grant to investigate
the incorporation of fluid power in theatrical production, specifically processor controlled systems (e.g., programmable
logic controllers). With this in mind we were looking for opportunities to utilize fluid power in real production situations.
During the development of our production of Angels in
America, Part One - Millennium Approaches, the director
described his vision of the final scene: he wanted the bed, in which
Prior was huddling, to shake "as if in an earthquake."
As part of our production process at KCPA we utilize
brainstorming sessions to develop solutions to production
challenges. We found that this brings out the best ideas and
encourages the development of ideas that are not owned by
one person, but are a collaborative effort. Through this process Tommy, Randy and I settled on the use of pneumatics
based on the following criteria:
* The system had to be completely self-contained, no external wires or hoses. (The bed originally needed to be removable from the wagon that transported it onstage.)
* All of the components had to fit under the bed which
would be hidden by the bedclothes.
* The system had to be simple to activate by an actor, meaning
a single switch located on the bed.
*
The system had to offer a wide amount of adjustability to
provide multiple options during technical rehearsals.
* The system should utilize components that could be easily reused in future projects.
In this situation, cost was a secondary factor due to the
research grant, and because we were able to establish an arrangement to obtain cylinders from a vendor as a donation.
Also noise was not an issue due to the loud sound cues occurring during the scene. The solution we chose incorporated a
fluid power circuit controlled by an electrical control system,
when the cylinders where energized the corner of the bed
raised up.
FLUID POWER (pneumatic) CIRCUIT
The pneumatic circuit included four 1″ stroke double-acting cylinders bolted to legs of the bed (figure 1). We included an "in-line" flow control valve on each cylinder,
which we ended up not using. For the control valve for
each cylinder we chose a 12-volt, solenoid-activated, 2way, 5-port air valve. To keep the system portable and selfcontained, we elected to use a small nitrogen gas cylinder,
although the same system could be connected to a traditional air compressor (figure 2).
TD & T
S U M M E R
2 0 0 1
39
Table of Contents for the Digital Edition of Theatre Design & Technology - Summer 2001
Contents
Theatre Design & Technology - Summer 2001 - 1
Theatre Design & Technology - Summer 2001 - 2
Theatre Design & Technology - Summer 2001 - 3
Theatre Design & Technology - Summer 2001 - Contents
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