Theatre Design & Technology - Spring 1999 - 27

with the rest of the performance. In reality, SMPTE code
and show control take care of triggering virtually the entire
show for Disney Magic's productions. All of the light cues,
projections, and fog come from a simple SMPTE command
structure. Show-control is also employed for virtually every
form of scenic shift within the theatre. Despite all the advantages of show control there is always the consideration
of making sure that the cast is not exposed to any unsafe
conditions that might occur while the show equipment is in
operation. In order to achieve appropriate levels of safety,
crew members must often verify whether a condition has
been met and will then activate a switch which tells show
control that it is safe to fire the upcoming sequence of
cues. Additional safety is provided through a system of four
video monitors that enable the booth crew to observe a
number of different areas of the stage remotely. These cameras are also equipped with infrared sensing so that cast
and crew members can be observed in the dark.
The show control system that is used for Disney Magic
(referred to as the LCU) was specifically developed by Walt
Disney lmagineering for use in their parks. The LC follows
SMPTE control signals from the audio decks and automatically
fires all of the Lighting cues, pyTO, lasers, fog, and projections
in addition to the stage machinery used for scene changes. Up
to now, Disney has one of only two of these systems in the
world. The most important feature of the LC system is that it
functions in a non-linear manner. This allows the capability of
easily skipping from one point to another within a production.
Entire sequences of cues may be skipped and the system will
self-adjust to get the shift elements, flys, and cues back on
track. This system, too, has a built in backup system through
containing a set of dual processors that will allow the operator
to easily switch to a backup if some show control system failure required it.
Most of the scenic equipment-including travelers,

roll drops, rigging, traps, lifts and other traveling mechanisms-is controlled by an Acrobat control console from
Stage Technologies ( .K.). This control is then interfaced
with Disney's LC show control system. There are only
about fourteen of these Acrobat systems in use throughout
the world, according to Sheilds, who added, "the systems
are so new that they're still writing the book on them."
When they need some debugging or fine tuning, Stage Technologies works up a solution using a series of simulations
on a system back in the nited Kingdom. Sheilds feels that
this type of control is going to make a significant impact on
making future productions smooth-running and efficient.
"It's a small price to pay for being on the leading edge of
technology."

INFRARED SYSTEMS
An infrared tracking system for scenic units, called the Ex-

plorer, was also developed by Stage Technologies. It uses
Wybron's AutoPilot automated follow spot system where a
tracking device is assigned to a performer whose position
is determined by a series of sensors mounted in the trusses
above the stage. The Explorer system utilizes tracking devices for determining the positions of the scenic units
through a combination of infrared and radio wave technologies. What makes the Explorer system unique in the
Walt Disney Theatre, is the way it interfaces with the show
control systems. Because Explorer calculates the coordinates of each unit it is tracking, it "knows" if a wagon has
really hit its mark. Even better, if a unit gets bumped, or
drifts slightly due to rolling seas, Explorer can tell the show
control and Acrobat systems how to adjust the next move in
order to get the unit to its next location correctly.
This "intelligent" manner of correcting shift problems
so that there is no compound effect of position error is

James Joy's sketch of
the Aladdin scene
from Disney Dreams.
TZ>&T

5

P

R

I

'G

I

9 9 9

25



Table of Contents for the Digital Edition of Theatre Design & Technology - Spring 1999

Contents
Theatre Design & Technology - Spring 1999 - 1
Theatre Design & Technology - Spring 1999 - 2
Theatre Design & Technology - Spring 1999 - 3
Theatre Design & Technology - Spring 1999 - Contents
Theatre Design & Technology - Spring 1999 - 5
Theatre Design & Technology - Spring 1999 - 6
Theatre Design & Technology - Spring 1999 - 7
Theatre Design & Technology - Spring 1999 - 8
Theatre Design & Technology - Spring 1999 - 9
Theatre Design & Technology - Spring 1999 - 10
Theatre Design & Technology - Spring 1999 - 11
Theatre Design & Technology - Spring 1999 - 12
Theatre Design & Technology - Spring 1999 - 13
Theatre Design & Technology - Spring 1999 - 14
Theatre Design & Technology - Spring 1999 - 15
Theatre Design & Technology - Spring 1999 - 16
Theatre Design & Technology - Spring 1999 - 17
Theatre Design & Technology - Spring 1999 - 18
Theatre Design & Technology - Spring 1999 - 19
Theatre Design & Technology - Spring 1999 - 20
Theatre Design & Technology - Spring 1999 - 21
Theatre Design & Technology - Spring 1999 - 22
Theatre Design & Technology - Spring 1999 - 23
Theatre Design & Technology - Spring 1999 - 24
Theatre Design & Technology - Spring 1999 - 25
Theatre Design & Technology - Spring 1999 - 26
Theatre Design & Technology - Spring 1999 - 27
Theatre Design & Technology - Spring 1999 - 28
Theatre Design & Technology - Spring 1999 - 29
Theatre Design & Technology - Spring 1999 - 30
Theatre Design & Technology - Spring 1999 - 31
Theatre Design & Technology - Spring 1999 - 32
Theatre Design & Technology - Spring 1999 - 33
Theatre Design & Technology - Spring 1999 - 34
Theatre Design & Technology - Spring 1999 - 35
Theatre Design & Technology - Spring 1999 - 36
Theatre Design & Technology - Spring 1999 - 37
Theatre Design & Technology - Spring 1999 - 38
Theatre Design & Technology - Spring 1999 - 39
Theatre Design & Technology - Spring 1999 - 40
Theatre Design & Technology - Spring 1999 - 41
Theatre Design & Technology - Spring 1999 - 42
Theatre Design & Technology - Spring 1999 - 43
Theatre Design & Technology - Spring 1999 - 44
Theatre Design & Technology - Spring 1999 - 45
Theatre Design & Technology - Spring 1999 - 46
Theatre Design & Technology - Spring 1999 - 47
Theatre Design & Technology - Spring 1999 - 48
Theatre Design & Technology - Spring 1999 - 49
Theatre Design & Technology - Spring 1999 - 50
Theatre Design & Technology - Spring 1999 - 51
Theatre Design & Technology - Spring 1999 - 52
Theatre Design & Technology - Spring 1999 - 53
Theatre Design & Technology - Spring 1999 - 54
Theatre Design & Technology - Spring 1999 - 55
Theatre Design & Technology - Spring 1999 - 56
Theatre Design & Technology - Spring 1999 - 57
Theatre Design & Technology - Spring 1999 - 58
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Theatre Design & Technology - Spring 1999 - 60
Theatre Design & Technology - Spring 1999 - 61
Theatre Design & Technology - Spring 1999 - 62
Theatre Design & Technology - Spring 1999 - 63
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Theatre Design & Technology - Spring 1999 - 65
Theatre Design & Technology - Spring 1999 - 66
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Theatre Design & Technology - Spring 1999 - 69
Theatre Design & Technology - Spring 1999 - 70
Theatre Design & Technology - Spring 1999 - 71
Theatre Design & Technology - Spring 1999 - 72
Theatre Design & Technology - Spring 1999 - 73
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