Theatre Design & Technology - Winter 2024 - 33

of rehearsal in which they have not only
to become familiar with the lighting design,
but with the control system as well.
Under these circumstances, a considerably
lesser degree of complexity can be
encompassed by the operator and effectively
performed on the control system.
At the other end of the scale are those
operators recruited from the rejects
who could not be cast in the production.
Their interest is often minimal and
their aptitude not much greater. Here it
is necessary to design systems which are
operator proof. Inspection of lighting cue
sheets indicates that a majority of the
dimmers for a typical production are being
used as balance controls and do not
change their relative settings for long
periods of time or often at any time during
a performance. Resetting these controls
for every preset scene is a pointless
labor which distracts the operator from
concentration on the performance. One
solution to this problem is to connect
several dimmers and their instruments
to the some controller, perhaps with the
added refinement of balance controls to
maintain the relative intensities of the
various instruments. The controller on
the console (in reality now a submaster)
may then be preset as are other dimmer
controls. Thus the console may contain
a relatively small number of " area masters "
under the immediate control of the
operator rather than a large number of
individual dimmer controls.
The number and wattage of dimmers
controlled by each submaster must not
be predetermined by the system designer.
For most efficient use of equipment,
lamp loads must approximate the ratings
of the dimmers to which they are
connected, but often lamps of different
wattages are used on a single area. Most
boards which permit interconnection of
dimmers and instruments have dimmers
of the some wattage grouped together
without regard for logical geographic,
color or mood groupings, thus either limiting
the potential usefulness of some of
the dimmers or making operations unnecessarily
difficult by spacing dimmers
which should be controlled together at
different locations on the control console.
The problem of grouping controls
which are operated together is further
complicated in theatres presenting plays
in repertory when a basic instrument
complement is used to provide most of
the light for the current repertory: groupings
of instruments which make for easy
operation of one play may not be equally
logical for the next.
The Machine
One of the problems plaguing operators
of most control systems is the amount of
" busy-work " -work which if the control
system were better designed need not
take place. The most glaring example in
preset control systems is the reselling of
individual controls for dimmers whose
output must not change from one preset
scene to the next. The usual answer
has been to provide a second operator to
adjust the presets, leaving the chief operator
with only the master controls. This
answer is only partially satisfactory since
it leaves practical control of the individual
instruments in the hands of a person who
is not expected to pay attention to the
performance.
One solution is some form of flexible
connection between controls and dimmer
channels. (Different plug-in dimmers
may be used in the same channel at various
times.) If a flexible interconnection is
available, the control of dimmers of different
wattages can be brought together
on the console in groups appropriate to
the control operations which must be
carried on. The desirability of flexible interconnection
of dimmers and controls
is not necessarily dependent on the decision
to mount dimmers in banks or on
battens near the instruments. The latter,
of course, demands flexible interconnection,
but the capability for operating a
selection of dimmers in succession or for
grouping instruments for operation by a
single control may be sufficient reason
for the flexible interconnection of dimmers
mounted in conventional banks.
Often certain instruments are only
used for a short time during a performance.
When these instruments are connected
to a dimmer through the usual
interconnecting panel, it is usually more
convenient to leave that dimmer inactive
through the major portion of the performance
than to connect other instruments
to the dimmer when the first instrument
is not needed. Not only is this procedure
an inefficient use of equipment, but if the
dimmer is represented on the control
console by a controller for each preset it
presents one more confounding element
which the operator must have constantly
before him as a source of potential error
and annoyance. If preset load programming
systems were incorporated
to permit a predetermined sequence of
instruments to be connected to a particular
dimmer, this inefficiency and potential
source of error could be eliminated.
Manufacturers of control systems have
eliminated many of the sources of operator
fatigue and unreliability. Additional
work should be done, however, in the
determination of materials, coatings, and
system parts least conducive to eyestrain,
the shape and dimension of controls, the
layout of most frequently used controls
for minimum reach, and the differentiation
of controls which are otherwise alike
in appearance. Serial information, such
as dimmer settings, has traditionally
been introduced into the machine using
dials or calibrated sliders. The interest of
the telephone companies in push-button
dialing may indicate that a faster and
more reliable model for data insertion
might be found in a typewriter keyboard
or desk calculator. A realistic appraisal
needs to be made of the time required
for an operator to set a dimmer level accurately
and also the time required to set
a large number of similar controls without
making mistakes. Experience with
conventional ten-scene preset systems
suggests that there should be one person
to adjust presets for each fifty dimmers if
cues are to be ready for execution at the
proper time and dimmer settings reproduced
accurately.
Modern control systems are almost
without exception intensity controls.
When it is desired to change the distribution
of any of the other properties of light
in the stage space, it is necessary to do so
using the intensity controls to substitute
a selection of instruments having one
distribution for a second set having another
distribution. The result is wasteful
in number of instruments, dimmers and
controllers since at any moment many
dimmers are inactive. It would be desirable
to be able with equal facility to control
the other properties of light from the
system. Clearly the first problem is not
one of control system design, but of the
development of instruments which make
possible the changing of the properties of
light they produce. (Instruments providing
limited control of direction, color and
beam spread have been marketed, but
have so for been found impractical under
ISSUE 1, 2024 | THEATRE DESIGN & TECHNOLOGY | 33

Theatre Design & Technology - Winter 2024

Table of Contents for the Digital Edition of Theatre Design & Technology - Winter 2024

Contents
Theatre Design & Technology - Winter 2024 - Cover1
Theatre Design & Technology - Winter 2024 - Cover2
Theatre Design & Technology - Winter 2024 - Contents
Theatre Design & Technology - Winter 2024 - 2
Theatre Design & Technology - Winter 2024 - 3
Theatre Design & Technology - Winter 2024 - 4
Theatre Design & Technology - Winter 2024 - 5
Theatre Design & Technology - Winter 2024 - 6
Theatre Design & Technology - Winter 2024 - 7
Theatre Design & Technology - Winter 2024 - 8
Theatre Design & Technology - Winter 2024 - 9
Theatre Design & Technology - Winter 2024 - 10
Theatre Design & Technology - Winter 2024 - 11
Theatre Design & Technology - Winter 2024 - 12
Theatre Design & Technology - Winter 2024 - 13
Theatre Design & Technology - Winter 2024 - 14
Theatre Design & Technology - Winter 2024 - 15
Theatre Design & Technology - Winter 2024 - 16
Theatre Design & Technology - Winter 2024 - 17
Theatre Design & Technology - Winter 2024 - 18
Theatre Design & Technology - Winter 2024 - 19
Theatre Design & Technology - Winter 2024 - 20
Theatre Design & Technology - Winter 2024 - 21
Theatre Design & Technology - Winter 2024 - 22
Theatre Design & Technology - Winter 2024 - 23
Theatre Design & Technology - Winter 2024 - 24
Theatre Design & Technology - Winter 2024 - 25
Theatre Design & Technology - Winter 2024 - 26
Theatre Design & Technology - Winter 2024 - 27
Theatre Design & Technology - Winter 2024 - 28
Theatre Design & Technology - Winter 2024 - 29
Theatre Design & Technology - Winter 2024 - 30
Theatre Design & Technology - Winter 2024 - 31
Theatre Design & Technology - Winter 2024 - 32
Theatre Design & Technology - Winter 2024 - 33
Theatre Design & Technology - Winter 2024 - 34
Theatre Design & Technology - Winter 2024 - 35
Theatre Design & Technology - Winter 2024 - 36
Theatre Design & Technology - Winter 2024 - 37
Theatre Design & Technology - Winter 2024 - 38
Theatre Design & Technology - Winter 2024 - 39
Theatre Design & Technology - Winter 2024 - 40
Theatre Design & Technology - Winter 2024 - Cover3
Theatre Design & Technology - Winter 2024 - Cover4
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