(Sanitized)OPERATING MANUAL

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A003000040035-7
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 23
• Document Creation Date: December 28, 2016
• Document Release Date: January 21, 2003
• Sequence Number: 35
• Publication Date: June 17, 1966
• Content Type: LETTER

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17 June 1966
STAT
STAT
Subject:
STAT
Operating Manual
Gentlemen:
Enclosed
are three (3) copies of
STAT
Operating
Manual, document lated June 1966,
STAT
submitte0 in accordance with item 6 of the contract.
Encl.
Cert.
Very truly yours,
Declass Review by NIMA / DoD
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OPERATING MANUAL
r
TILT TOP LIGHT TABLE
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TABLE OF CONTENTS
arr
II
General Description
Description of Controls
Page
1
2
1) Power On-Off Switch
2
2) Tilt Control
2
3) Fuse
2
4) Swivel Lock
2
5) Pilot Light
2
6) Brightness Control
2
7 Sc 8) Light Shades
3
9 & 10) Film SPEED Controls
3
11) DRIVE COUPLIN( Control Lever
3
am
12 & 13) SLEW Controls
3
14) POWER ASSIST Switch
3
15) LOADING Switch
4
16) CONTROL SELECTOR Switch
4
17) Center Shade Control
4
13) Alternate Handwheel Switch
5
19, 20 & 21) Handwheel Clutch and Interlocks
5
22) ROTATION Controls
5
23) Drive Spindle Lock
6
24) Drive Gear Box Position Lock
6
25) Center Support Lock
6
III
Operating Equipment
6
A) Setting up for Operation
6
1) Physical Handling of Instrument
6
2) Positioning on Table
7
3) Applying Power
7
B) Orientation of Format
7
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C)
Film Loading
1) Loading Film Spools
2) Setting ROTATION Controls
3) Film Threading
Page
9
10
10
D)
Illumination Control
10
E)
Shade Adjustment
11
F)
Transporting Film
11
1) Independent Mode
11
a) Manual Mode
11
b) Power Assist Mode
12
c) Automatic Slew Mode
13
2) Coupled Mode
13
a) Manual Mode
13
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b) Power Assist Mode
14
c) Automatic Mode
15
3) Other Variations Possible when
in Coupled Mode
16
G)
Summary of Precautionary Notes
16
I.
a.
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GENERAL DESCRIPTION
OPERATING MANUAL
is a film viewing table of advanced design. It in-
corporates many features which make the viewing and interpretation of
aerial film or other transparent films faster, more efficiently, and
less fatiguing to the operator.
consists basically of a transilluminated table mounted
on a tilting base with provisions for mounting and spooling of film a- STAT
cross the top. The table will accept standard spools of 9 1/2,
5 inch or 70mm film with lengths up to 500 feet. In the case of the 5 STAT
inch and 70mm films, two films may be viewed at the same time. The tilt-
ing base permits the viewirg surface to be positioned anywhere from
horizontal to 75 degrees. The instrument may also be swivelled on the
base so that the axis of tilt is changed. When the equipment is used
tilted about the short axis, a third handwheel is available on the back
(now the left side when facing the format) for convenient control of the
rear film.
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Film transport is accomplished in one of a number of modes
through a unique electro-mechanical drive system which allows one hand-
wheel to be used for transporting film in both directions. A power
assisted mode of operation is available which relieves the operator of
most of the physical burden of transporting film. A fully automatic
mode in which the handwheels are not used is also available. In this
mode, the operator controls film motion by potentiometers.
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Spooling of film with either the emulsion in or out is ac-
complished by spool drive reversing gear boxes in each drive spindle
head. This allows handwheel motion to control the direction of film
travel regardless of how the film is being spooled (i.e., emulsion in
or out).
A coupling device is included to permit both film drives to
be linked together and controlled from any one of the three handwheels.
Both films may be driven in the same direction, or in opposite direc-
tions by the same control.
II DESCRIPTION OF CONTROLS
(Refer to Figure 1)
On Base
1) Power ON-OFF Switch - Controls all power coming into
equipment.
2) Tilt Control - A momentary contact center OFF switch
which controls direction of tilt. UP increases tilt; DOWN decreases
tilt.
3) Fuse - All electrical power passes through this fuse. It
is a type 3AGX 5 ampere (slo-blow).
4) Swivel Lock - A spring loaded plunger which locks the
light table on base in either of two positions. Pull down to release.
On Front Panel
5) Pilot Light - Illuminated whenever main power switch is
on.
6) Brightness Control - Controls general format illumination
brightness. Counterclockwise rotation increases brightness. Switch
actuation at limit of CCW travel increases brightness by removing com-
pletely dimming control from circuit.
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7 & c) Light Shades - 7 and 2 are thumb wheels, mechanically
connected to the front and rear shades respectively. Each shade may be
extended across the format to slightly beyond the middle. Control for
the center shade (17) is located at the rear right corner of the table
and is described later.
9 & 10) Film SPEED Controls - 9 and 10 are the controls for
mechanically changing the gear ratio between the handwheels and the film
spools. In the "low" position the ratio is 1:1 and in the "high" posi-
tion it is 1:2.5 (spool faster). Control 9 is for the front film, and
10 for the rear. In the mid or neutral position the handwheel drive is
disconnected from the spool drive.
11) DRIVE COUPLING Control Lever - the DRIVE COUPLING con-
trol lever mechanically couples the film drive systems so that any one
of the three hardwheels may be used to drive both films. It has three
positions; in the center or "independent" position (which is not labelled)
the film drives are independent, in the SAME position the films transport
in the same direction, and in the OPPOSITE position the films are coupled
to transport in opposite directions.
12 & 13) SLEW Controls - 12 and 13 are the automatic slew
controls for the front and rear films respectively. These are operative
only when all three handwheels are in the disengaged positions (pulled
out). Their direction and angle of rotation from the center position
determines the direction and speed of film transport.
14) POWER ASSIST Switch - In the "on" (up) position, this
switch activates the power assisting motors and clutches. It must be in
the up position when operating in either the power assisted mode or in
the,fully automatic mode. In the down position there is only a direct
mechanical connection between the film drive system and the corresponding
handwheel.
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15) LO.'iniTj; Switch - The loading switch deactivates (in up
position) the film tensioning rollers and reduces the friction on the
mechanical brakes. This is provided prinarily for the purpose of load-
ing film.
16) CONTROL SELECTOR Switch - This switch is always left in
the LEFT position except when the Coupling Control (11) is in either
the SAME or OPPOSITE positions. With the equipment in one of these two
coupled modes the Control Selector Switch selects which handwheel (or
slew control knob) is to be effective in transporting film. Thus, in
the coupled mode when this switch is in the LEFT position the left
(front film) handwheel is controlling both films and when in the RIGHT
position the right (or rear film) handwheel is used to control both
films. When in the TUHT position, however, which of the rear film
handwheels in operation depends on position of the Alternate Handwheel
switch (13) which is described later.
It should be noted that this switch is of concern only
when operating in the power-assisted or fully automatic modes of film
transport. With the POWER ASSIST (14) switch off (down) the film drives
are only mechanically coupled to the handwheels, thus any handwheel is
operative in the coupled mode regardless of the position of this switch.
On the Light Table
17) Center Shade Control - The center shade is positioned
by rotating the control crank on the rear left side of the light table.
This crank controls the position of the opaque section of a Mylar belt
that travels down the center of the format. The opaque section is po-
sitioned over the ,format when two films are being viewed and the clear
section when a single large film is being used.
NOTE: There are stops in the position of the belt. Since
there is a friction drive, no damage can be done, when the stop is
encountered.
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18) Alternate Handwheel Switch - Located on the light table
casting next to the rear left (when facing front panel) handwheel, this
switch actuates this handwheel when in the up position. It is intended
to be used only when the instrument is tilted up about its short axis
and is being operated from the end. Actuation (up position) of this
switch in effect transfers control of the rear film drive from the front
right handwheel to the left rear handwheel.
19, 20 & 21) Handwheel Clutch and Interlocks - Each handwheel
has two axial positions on its shaft. In the in (handwheel pushed in
toward the casting) or engaged position, the handwheel is mechanically
coupled to its respective film drive. The engaged position also causes
the handwheel interlock switch to actuate which prevents the film from
being transported by using the slew controls. With the handwheel in the
out or disengaged position, it is decoupled from the film drive and is
free to rotate on the shaft. In this position, the handwheel interlock
switch is deactivated, which (when all three are deactivated) allows the
film to be transported using the slew control knobs, while the handwheels
remain stationary. This is primarily a safety feature.
NOTE: All handwheels must be in the disengaged position in
order to operate in the fully automatic slew mode.
On the Film Drive Gear laq?ces
22) ROTATION Controls - On each of the four film drive gear
boxes there is a ROTATION control. This controls the direction of
rotation of the film spool relative to that of its corresponding hand-
wheel. Thus, when the lever is set at SAME, rotation of the handwheel
rotates the spool in the same direction as the handwheel and when in
REVERSE opposite directions occur. This feature is included to allow
any combination of emulsion up or down viewing with emulsion in or out
spooling.
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23) Drive Spindle Lock - On each of the four driving spindles
there is a locking device which locks the spindle in one of two positions.
For loading film the spindle center button is depressed and the spindle
withdrawn until it locks in its "out" position. When the film is loaded,
the button is depressed and the spindle driving dog allowed to enter the
film spool until the "in" detent position is reached where upon the
button pops out and the spindle is prevented from moving axially.
24) Drive Gear Box Position Lock - On each of the four drive
gear boxes there is a thumbscrew type locking device which holds the
gear box in the proper position for the different film spool sizes. De-
tents are provided on the guide rods for the most common film widths of
1/2 inch, 5 inch and 70mm. Other film widths may be used by disre-
garding the position of the detents. In these other cases, care should
be exercised to prevent excessive tightening of the thumbscrews since
they could be clamping outside of the detent area.
25) Center Support Lock - The center spool supports located
at either end of the table have thumbscrew type locks. Detented positions
are provided on the guide rod for the common film spool widths, although
other spool widths may be accommodated by clamping outside the detents.
Care should be exercised in such cases not to excessively tighten the
thumbscrews.
III OPERATING Eitl_TIP'1ENT
A) Setting up for Operation
1) Physical flandling of Instrument
The unit may be carried by two people by lifting on the
underside of the light table. Do not lift by the handwheels, gear box
guide rods, or film rollers. The unit is most easily lifted w'hen the
viewing surface is horizontal. When in the rear vertical position
(tilted about short axis) the unit may be carried by two people lifting
on the underside of the tilting base.
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2) Positioning on Table
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is designed to be used on a table of normal or STAT
lower heiglt. It should be positioned so that the edge of the base
plate comes right to the front edge of the suoporting surface. This
position allows handwheels to clear table top when instrument is tilted
about the long axis to 45 degrees. Q. not let the front edge gi the
base Dlate extgAd pver the clge j the table otherwise the stability of
the instrument may be jeopardized when it is erected to its near-vertical
im position.
3) .7.221.1.7ir_z_Power
All power is obtained from the conventional 115 volt, 60
cps single phase supply. The instrument is supplied with a power cord
and common three wire grounded plug. Te ground wire is connected to
the frame of the instrument to prevent accidental shocks in the event
of an electrical malfunction.
The equipment is fused at 5 amperes with a standard 3AGX
5 ampere sl-blow buss fuse (3).
Plug equipment into properly wired outlet and set SLEW
control knob pointers (12 and 13) to their reference marks. Turn on
Power Switch (1), pilot light (5) should glow indicating power is being
supplied to the equipment. No warmup time is required before operation.
B) Orientation of Format
The light table is mounted on a base which provides two de-
grees of freedom in the orientation of the viewing format. The base
tilts forward and may be adjusted at any angle from horizontal to 75
degrees although when the table is in one position (long axis parallel
to edge of support table) the angle of tilt should be limited to approxi-
mately 45 degrees because of interference between handwheels and table.
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The light table may also be pivoted through 90 degrees on the
base assembly to allow the short dimension to be parallel to the edge of
the table. The Swivel Lock (4) provides a positive lock in either of
these two positions. In addition, there are mechanical stops to prevent
the light table from grossly exceeding its swivel limits.
To adjust the table for viewing, withdraw spring loaded Swivel
Lock (4) pin by pulling down and swivel table to desired viewing orien-
tation. Make sure Swivel Lock snaps into the locked position. Turn on
power (1) and actuate Tilt Control (2) in direction of desired tilt.
This is a spring centered switch and must be held in position for as
long as one wishes the tilt angle to increase (or decrease). Releasing
the switch stops the tilt motor and locks the tilt mechanism. No ad-
ditional supports or stays are necessary, nor are any provided.
The tilting mechanism is capable of providing up to 75 degrees
of tilt with both mechanical stops and electrical limit switches pre-
venting overtravel. However, the operator should be aware of the
following limitations:
1) ILI.a4imu angle of tilt when the long dimension of format
ip parallel to the ti1,t_ axis js approximately 45 dearees.
is When tilting the table up in this condition the operator should con-
tinuously observe the clearance between the handwheels and the edge of
? the support table. If the edge of the instrument base is not in line
with the edge of the table the angle of tilt will have to be kept at
even less than 45 degrees.
2) Make sure that edge of base does not overhang edge of
table when tilting to hijh angles when the short dimension
of the format is parallel to the axis of tilt. The reason for this is
to prevent the instrument from becoming unstable and falling off the
front of the table. In this mode of tilt, the operator should also
observe the clearances between the instrument, including film spools,
and the edge of the table.
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C) Film Loading
1) Loading Film Spools
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Set the spool drive gear boxes and the center support for
the film (or films) to be viewed. Notice that the detents in the guide
support rods are for the most common film sizes and combinations (i.e.,
9 1/2, 5 inch and 70mm). The detents establish the support and gear
box positions only approximately and some adjustment may be necessary
within the detent freedom to insure the Spindle Lock (23) has enough
travel to reach its locked position when the spool is in place. One
simple way of doing this is to hold up an empty spool, so that its outer
NI
rim acts as a gauge, between the drive and idler spindles before attempt-
ing to put full spools in place. Note, that for the spindle to be
locked-in, the Spindle Lock (23) button must be in the out position.
UM)
The detents on the guide bars are arranged so that the
front spindle drive gear boxes are used when a 9 1/2 inch film is viewed,
the center support being pushed to the rear of the unit. When smaller
films are used (one or two) the center idler spindle is placed in the
middle of the guide bar. This insures that the center shade will be in
the proper position.
Although detents have been provided to serve as a guide
and prevent the locking thumbscrews from marring the guide rod after
long use, it is possible to use other than the detent positions for
different sized film as long as the operator does not tighten the locking
thumbscrews excessively.
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2) Setting ROTATION Controls
The ROTATION Controls (22) on each gear box are set in
either the SA:1E or REVERSE position, depending on whether the operator
wants to view the film with the emulsion up or down, whether the film
is spooled emulsion in or out, and how the operator wants the emulsion
wound, in or out. Any combination is possible. The terms SAME and
REVERSE indicate the relative direction of rotation of the film spool
with respect to the handwheel.
Some resistance may be encountered in engaging the gears,
which may require the operator to rotate the film spool or handwheel
slightly to mesh the gears.
Film Threading
To thread film, after spools have been loaded and gear box
rotations set, put LOADING switch (15) in up position. This will de-
activate the tensioning rollers permitting film to be threaded under.
The film is threaded over the upper rollers and down and
under the tensioning rollers across the viewing surface and through the
reverse sequence on the other side to the take-up spool. This path is
the same regardless of how the film is wound on the spool.
D) Illumination Control.
art
The brightness of the cold cathode light source is controlled
by the BRIGHTNESS control (6) on the front panel. Counterclockwise
rotation of the control knob increases the brightness. A switch coupled
to operate at the end of the counterclockwise rotation increases the
brightness to maximum by shorting out the regular dimming control.
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E) Shade Adjustment
The equipment is equipped with three shades. Two move from
either side of the format toward the center. These are mechanically
positioned by the thumbwheel controls 17 and 2) on the front panel.
The third shade is a partly opaque partly transparent Mylar tape running
down -Lhe center of the format. This shade is used when two films are
being viewed and it is desired to block out the illuminated strip be-
tween. The control (17) is a crank located at the rear left side of
the light table casting. Note, that there is a mechanical stop on the
tape, however, a friction drive prevents damage to mechanism or tape
when the stop is encountered.
F) Transporting Film
The transporting of film may be accomplished either with the
handwheels or with the SLEW controls (12 and 13). The description of
these various modes of operation is first presented for the mode in
which the films are independently controlled (i.e., DRIVE COUPLING
lever (11) is in the "independent" or center position) and then for the
mode during which the film transport mechanisms are coupled together.
NOTE that for all operations with the DRIVE COUPLING lever
set in the 'independent' position, the CONTROL SELECTOR
switch should be in the LEFT position.
1) Independent 'lode (DRIVE COUPLING Lever in 'Independent"
or Center Position)
a) Manual Mode tIndependent Drive)
In the manual mode of operation, the POWER ASSIST
switch (14) should be off (down). The handwheel corresponding to the
film to be transported should be engaged (pushed in toward the casting).
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The handwheel is turned in the direction the operator
wishes to move the film. About 45 degrees of motion is required before
the handwheel engages a stop which produces a direct mechanical connec-
tion between the handwheel and the film drive mechanism. This motion is
necessary for proper operation when in the power driving modes.
Although the films are being transported purely me-
chanically in this mode the electronic circuitry is still active in
sensing handwheel motion and raising the tensioning rollers.
The Film SPEED control (9 or 10) must be set in the
HIGH or LOW position according to the speed at which the operator desires
to transport film. It should be noted that the amount of load torque
reflected to the handwheel will depend markedly on the relative amounts
of film on the spools and the direction in which film is being trans-
ported.
b) Power A ist lode Independent Drive)
In the power assist mode of operation, the POWER ASSIST
switch (14) must be on (up) and the handwheel, corresponding to the
film to be transported, must be in the engaged position (pushed in toward
the casting). Turning the handwheel will cause the tensioning rollers
to raise and the film to be transported in the same direction.
The proper Film SPEED control (9 or 10) must be set in
either the HIGH or LOW position, depending on desired speed of film
transport. In general, it has been found that the most satisfactory
position for general operation is in the LOW position.
position.
The CONTROL SELECTOR switch should be in the LEFT
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When driving the .rear film, the position of the Al-
ternate Handwheel switch (21) should be kept in mind. With this switch
in. the "off" (or down) position the front left handwheel is used to con-
trol the rear film. With the switch in the "on" (or up) position the
back left handwheel is activated.
c) Automatic Slew Mode (Independent Drive)
In the automatic slew mode of operation, film may be
transported using only the SLEW Control (12 and 13) knobs. The POWER
ASSIST switch (14) must be on (up) and all bandwheels must be pulled
out disengaging their clutches and deactivating the Interlock switches
(19, 20, 21). The Film SPEED lever should be set in the HIGH or LOW
positions, the LOW being the position normally preferred.
The film may now be transported by rotating the SLEW
control (12, 13) in the desired direction of travel. The tensioning
rollers will automatically raise as the film starts to move and will
return to their down position after the film has stopped (2 second time
delay) and the pointer on the control knob is pointing to the reference
point. Ordinarily, it is not necessary to refer visually to the knob
setting, the operator should soon acquire the "feel" of the control and
know when it is in the middle or "off" position.
NOTE, thAt when driving the films independently, the
CON-1ROL SELECTOR switch (16) should always be in the
LEFT position.
2) Coupled %lode (DRIVE COUPLING Lever (11) in Same or
Opposite Positions)
a) Manual:Vde (Coupled Drive)
In the manual mode of operation with the DRIVE COUPLING
lever (11) set at SAME or OPPOSITE, the film drives are coupled together,
??? thus interconnecting all three handwheels.
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Any of the three handwheels may be used to control
both films. Mechanically engage the handwheel by pushing in and rotate
in direction of desired film travel. If the DRIVE COUPLING lever (11)
is set at SAME, films will transport in same direction and in opposite
directions if set at OPPOSITE. The relative speeds of film transport
will depend on the amounts of film on the spools and consequently, may
not be the same.
The film SPEED levers (9 and 10) should be set to HIGH
so
or LOW, depending on desired speed of film transport. However, since
two films are being transported the torque required may be considerable
IN when in the HIGH position. The LOW position is generally preferrable
when in this mode.
NMI
ONO
A small amount of lost motion may be felt when turning
the handwheel before the film starts to transport. This is a character-
istic of the design; this motion is necessary for proper operation when
using the power assist feature.
Although the film is transported completely mechanically
in this mode of operation, the electronic controls still raise and lower
the tensioning rollers as the film is transported.
b) Power Assisted Mode Coupled Drive)
To use the power assist feature in the coupled mode,
the POWER ASSIST switch (14) must be on (up) and the handwheel which is
to be used must be mechanically engaged by pressing it in toward the
casting. Now, any one of the three handwheels may be used to transport
both films; the handwheel which has control of the film transport servo
motor is selected by the CONTROL SELECTOR switch (16) and the Alternate
handwheel switch (n). With the CONTROL SELECTOR switch in the LEFT
position, the left front handwheel is the only active control. With the
CONTROL SELECTOR switch in the RIGHT position, the film may be controlled
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by either of the two handwheels normally associated with the rear film
(i.e., front right and rear left). Which of these two handwheels is
active depends on the position of t;-le Alternate Handwheel switch (18)
next to the rear handwheel. When this switch is in the off (down)
position the front right handwheel is active, and when this switch, is on
(up) the rear left handwheel is in control of film transport.
The REAR and FRONT SPEED levers (9 and 10) should be
set in the HIGH or LOW positions, depending on desired speed of film
transport. However, the operator should keep in mind that during the
coupled mode of operation both films are being transported by a single
film drive motor, and depending on the relative amounts of film on the
spools and the direction of film transport it is possible to get a
condition where considerable load torque is reflected to the handwheel.
Thus, when in the coupled mode it is generally advisable to keep the
No SPEED levers (9 and 10) set in the LOW positions.
If the LOADING switch (15) is down, the tensioning
rollers will autollatically be raised and lowered as the films are
transported.
rig
air
The automatic mode of operation is activated when
all three handwheels are mechanically disengaged (pulled out). Either
of the SLEW controls may be used to transport the films; the control
which is active depends on the position of the CONTROL SELECTOR switch
(16). With the CONTROL SELECTOR in the LEFT position, the left or
FRONT SLEW control (12) is active. When the CONTROL SELECTOR is in the
RIGHT position, the right or REAR SLEW control (13) is active.
c) Automatic qode Coupled Drive)
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The operator should set the SLEW controls (12 and 13)
to their center positions before disengaging all three handwheels (thus
going into automatic mode) to prevent the films from unexpectedly
starting to move. NOTE, that the tensioning rollers will automatically
be raised (assuming LOADING switch (15) is in down position) when the
film starts to move and will be lowered when the pointer on the control
knob is returned to the center position mark. Ordinarily, it is not
necessary for the operator to visually refer to the position of the
control knob; the operator should soon acquire the "feel" of the control
and know when it is in the middle or 'off" position.
3) Qiher Variations Possible when in Coupled Mode
When in the coupled mode (DRIVE COUPLING lever (11) is
set on SAME or OPPOSITE) and with a single film being viewed it is
possible to control the film with any one of the handwheels.
IN
This feature may be thought of simply as a special case of
as operation in the coupled mode as described under paragraph F) 2). The
procedures for setting up for this type of operation are the same as
when setting up to transport two films in the coupled mode except that
the second film (generally the rear film) does not exist.
G) Summary of Precautionary Notes
1) Slew C.Dntrols (12 and 13) - Both FRONT and REAR SLEW
control knobs should be set to their mid positions (so pointer lines up
with reference mark) before turning on power or before disengaging all
three handwheels. This is to prevent the film transports from unexpect-
edly starting to drive.
2) Handwheel Interlock Switches (19, 20, and 21) - All three
mai handwheels must be pulled out (disengaged) before operation in the auto-
matic mode (i.e., using SLEW controls).
MN
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3) Limits of Tilt - To obtain maximum tilt in both orientations
the front edge of the instrument base must be even with the front edge
of the supporting table. Do not let base overhang front edge or else it
may become unstable at high tilt angles. Tilt when raising about the
short axis is limited to 75 degrees by limit switches and mechanical
stops; tilt about the long axis must be 1iiited by the operator to about
45 degrees or else handwheels will interfere with supporting table.
4) Control Selector Switch - This switch must be in the RIGHT
position for operation when the DRIVE COUPLING (11) lever is in the
center or independent position. Note that this position is not marked.
5) Drive Spindle Lock - The operation of the lock is indicated
so by the position of the actuating button. Button must be out to insure
spindle is locked against axial movement.
OW
10
10
01
6) Loading Switch - The LOADING switch in the up position
raises the tensioning rollers and releases the brakes on the film spools.
It is essential that this switch be in the up position when loading and
threading film.
7) Overloading Conditions - Conditions may occur when driving
film in the coupled mode and when the FILM SPEED (9 and 10) controls are
in the HIGH position where excessive driving torque is reflected to the
handwheel. If this condition occurs, shift SPEED controls to LOW position.
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