oConnor 120EX Manual

OConnor 120EX Pan and Tilt Head Operator's Guide, Part No. C1225-4980
Copyright © Vitec Group plc 2007
All rights reserved throughout the world. No part of this document may be stored
in a retrieval system, transmitted, copied or reproduced in any way including, but
not limited to, photocopy, photograph, magnetic or other record without the prior
agreement and permission in writing of Vitec Group plc.
OConnor ® is a registered trademark of Vitec Group plc.
120EX Pan & Tilt Fluid Head
Operator’s Guide Part No. C1225-4980

Preface
Thank you and congratulations on the purchase your new 120EX from OConnor.
We want you to get the most from your new 120EX, and therefore encourage you
to read this operator's guide to familiarize yourself with its many features, some
of which may be new to you. It also covers essential health and safety
information and a section on maintenance that will ensure you keep your new
product in perfect condition.
Please register your purchase by completing the product registration form
online at http://registration.ocon.com
Features and benefits of your new 120EX
The 120EX head is the flagship of OConnor's new EXTENDED CAPACITY range
of fluid heads - the EX range. Based on the new patented EX-technology, this
head features a new kind of stepless counterbalance system as well as a new
ultra-smooth pan and tilt fluid drag designed for film style shooting.
OConnor's fluid heads are famous for ultimate control and stability for film style
shooting. Now, with the use of EX-technology, OConnor can offer the features it
has become famous for with the additional benefit of extended capacity. With a
new counterbalance mechanism at the heart of the EX-technology, the 120EX
can be boosted into EX-mode to achieve a whole new realm of counterbalance.
True and accurate balance is achieved through the sinusoidal EX-counterbalance
technology. The EX-drag technology is ultra-smooth and stepless - just what
OConnor is famous for.
The EX-Mode
Getting more than 100% is the best way to describe the EX-Mode on the new EX
range of fluid heads by OConnor. The EX fluid heads have a given payload range
for the ±90° tilt range. With traditional counterbalance mechanisms any payload
heavier than this maximum weight cannot be balanced. But with the EX range of
fluid heads, you can go far beyond that maximum payload by slowly limiting the
tilt range as the payload is increased. The tilt range is still an impressive ±60° at
the maximum payload of 240 lbs (109 kg). The full tilt range of ±90° is maintained
with payloads between 30-120 lbs (14-54 kg). All of these ranges are based on
an 8" center of gravity.
2
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

3
Other Features
A collapsible counterbalance crank knob and digital readout make
counterbalancing the payload easy - even though the range is huge. The new
easy-to-use sideload mechanism features a push and turn platform knob with a
"pop up" gear to engage the camera mounting plate and adjust the platform fore
and aft easily and precisely. It is easy to move heavy camera payloads forward
and backwards on the head with this mechanism. Geared and non-geared plates
can be used on the platform.
OConnor's fluid drag system allows an extremely quick pan movement from one
position to another, recovering instantly without any spring back.
You can set up easily in low light conditions using the illuminated level bubble
and back-lit display.
Once again, thank you for choosing the 120EX. We are confident it will give you
many years of reliable performance.
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

4
Safety - Read This First
Warning Symbols in this Operators Guide
Where there is a risk of personal injury, injury to others, or
damage to the pan and tilt head or associated equipment,
appropriate comments appear, highlighted by the word
WARNING! and this warning triangle symbol.
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

5
Technical Data
Note: Payload capacity and tilt ranges are based on a C of G height of 8"
Payload Capacity: . . . . . . . . . . . . 30 - 240 lb (14 - 109 kg)
See counterbalance chart
Tilt Range: . . . . . . . . . . . . . . . . . . ±90° for payloads up to 120 lb (54 kg)
±80° for payloads up to 147 lb (67 kg)
±70° for payloads up to 188 lb (85 kg)
±60° for payloads up to 240 lb (109 kg)
Pan Range: . . . . . . . . . . . . . . . . . 360°
Height: . . . . . . . . . . . . . . . . . . . . . 9.8 in (24.8 cm)
Width: . . . . . . . . . . . . . . . . . . . . . 13.2 in (34.1 cm)
Depth: . . . . . . . . . . . . . . . . . . . . . 10.4 in (26.5 cm)
Weight: . . . . . . . . . . . . . . . . . . . . 34 lb (15.5 kg)
Operating Temperature Range: . . -40°F to +140°F (-40°C to +60°C)
Dolly/tripod fixing: . . . . . . . . . . . . Mitchell base
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

6
Further Information
For further information or advice regarding this pan and tilt head, please contact
OConnor Engineering at:
Camera Dynamics Inc.
OCONNOR ENGINEERING
100 Kalmus Drive Costa Mesa, CA 92626
Tel: [phone]
Fax: [phone]
Camera Dynamics Inc.
OCONNOR ENGINEERING
2701 N. Ontario St Burbank, CA 91504
Tel: [phone]
Fax: [phone]
E-mail: [email protected]
Or visit our website www.ocon.com and use the contact form.
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

7
Contents
Preface ...............................2
Features and benefits of your new 120EX . . . . . . . . . 2
The EX-Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Other Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety - Read This First . . . . . . . . . . . . . . . . . . 4
Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . 5
Further Information . . . . . . . . . . . . . . . . . . . . . 6
Contents..............................7
Introduction ...........................9
Extended Capacity Balance . . . . . . . . . . . . . . . . . . . 10
Digital Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Ultra Smooth Fluid Drag . . . . . . . . . . . . . . . . . . . . . . 10
Pan And Tilt Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Tilt Lock Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Illuminated Bubble Level . . . . . . . . . . . . . . . . . . . . . . 11
Handle Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Camera Mounting Platform . . . . . . . . . . . . . . . . . . . . 11
Mitchell Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Operation ............................12
Installing The Head . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Handles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Eyepiece Leveler . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Mounting A Camera . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Stability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Balancing The Head . . . . . . . . . . . . . . . . . . . . . . . . . 14
Fore And Aft Balance . . . . . . . . . . . . . . . . . . . . . . . 14
Payload Weight And C of G Height Adjustment. . . . . 16
Locking The Platform. . . . . . . . . . . . . . . . . . . . . . . . . 16
Pan And Tilt Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Pan And Tilt Fluid Drag . . . . . . . . . . . . . . . . . . . . . . . 17
The Balance Display . . . . . . . . . . . . . . . . . . . . . . . . . 17
Low Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

8
Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Routine Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . 18
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Battery Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 19
Balance Mechanism Calibration . . . . . . . . . . . . . . . . 20
Adjusting The Lock Levers . . . . . . . . . . . . . . . . . . . . 20
O.Connor Contact Information. . . . . . . . . . . . . . . . . . 21
Headquarters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
USA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
China . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
France . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Germany . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Japan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Singapore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
UK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

9
Introduction
The 120EX pan and tilt head embodies: a unique and patented EX-counterbalance
mechanism for true and accurate balance; EX-drag assemblies for ultra-smooth pan
and tilt motions; and an adjustable camera mounting plate.
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

10
Extended Capacity Balance
The spring counterbalancing mechanism comprises four springs operating
against a three-dimensional cam connected to the camera mounting platform.
The balance mechanism is adjusted by the counterbalance crank on the lower
left rear of the head. The knob has a retractable handle and the 'push in and turn'
action uses a clutch to prevent inadvertent damage to the balance mechanism.
Adjustments should only be made with the platform in the horizontal position.
Maximum and minimum payloads that can be balanced, and tilt ranges, are
dependent on the weight of the camera and accessories and on the center of
gravity © of G) height. The graph below shows the range of loads and C of G
heights that can be maintained in balance. At the lower end of the weight range
the full ±90 degree tilt range is available while at the maximum load the tilt range
is reduced to ±60 degrees.
Digital Display
The digital display indicates the setting of the balance mechanism on a scale of
0-182%. Press the display actuator button to illuminate the display and adjust the
counterbalance crank. At settings above 100% the EX indicator will turn on to
alert you to the reduced tilt range. The display turns off automatically
approximately 15 seconds after you stop adjusting. The display dims in dark
surroundings.
Ultra Smooth Fluid Drag
Both the pan and tilt mechanisms incorporate OConnor's ultra smooth fluid drag
to ensure smooth movement. The pan and tilt drag adjustment knobs are on the
right side of the head and are continuously adjustable from 0 to 9.
Pan And Tilt Locks
Friction locks on each axis allow the head to be locked at any desired position.
The pan and tilt lock levers are on the left-side of the head.
20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320
9 18 27 36 45 54 64 73 82 90 100 109 118 127 136 145
12
10
8
6
4
2 51
102
152
203
254
305
0
CAMERA WEIGHT
in mm
lbs
kg
min. 90º 80º 70º 60º
COUNTERBALANCE
±º
EX MODE
120EX
CAMERA CENTER OF GRAVITY
ABOVE PLATFORM
±90° MODE
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

11
Tilt Lock Pin
The tilt lock pin on the left side of the head is used to lock the head in a
horizontal position. The lock pin is actuated by a flip lever with red (locked) and
green (unlocked) label indicators.
Illuminated Bubble Level
The bubble level on the left side of the head can be illuminated by pressing the
display actuator button. The light will go out after approximately 15 seconds.
Handle Mounting
Handle mounting points are located at the front and rear of the head, on both the
left and right sides. A telescoping extension handle is supplied and is attached
using the handle clamp, with angular adjustment available on the rosette
serrations. Additional handles, including a front handle and accessories can also
be installed.
Camera Mounting Platform
The camera is attached to the head by means of: an OConnor geared plate; an
OConnor plate; a 120mm Euro plate; a Panavision dovetail plate; or an Arriflex
dovetail plate. The platform will accept geared or non-geared plates.
Mitchell Mount
The 120EX head is provided with a standard Mitchell base mount.
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

12
Operation
Installing The Head
The 120EX head may be installed on a standard tripod with a Mitchell base
mount using the tiedown knob assembly provided.
After securely mounting the head on the tripod, use the bubble level to set it
level. If necessary, press the display actuator to illuminate the bubble level.
Handles
Install the handles on the rosette handle mounts and adjust the position before
tightening the clamps. Adjust the length of the telescoping handle as desired.
Eyepiece Leveler
If required, install the optional undermount eyepiece leveler (EPL) assembly on
the left hand side below the counterbalance crank. The eyepiece leveler is
compatible with Arri's eyepiece rods.
Alternatively, the rear mount eyepiece leveler is attached to the left rear
shoulder screws.
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

13
Mounting A Camera
WARNING!
Do not rely on the tilt lock when changing the payload.
Always tilt the platform horizontal and engage the tilt lock
pin by placing it in the red (engaged) position. The tilt pin
will drop into the platform.
• Ensure that the weight and C of G height of the total payload is within the
range for which the head is designed
• If you are installing the head on a pedestal or dolly, lock the pedestal or dolly
before installing the camera.
To mount the camera:
1. Attach the mounting plate to the bottom of the camera/lens.
2. Engage the tilt lock pin.
3. Release the safety latch and pull out the platform release lever.
4. Press down and hold the platform hook release (red tang) on the left hand
side of the head.
5. Position the camera and mounting plate on top of the head and release
the hook to secure the mounting plate.
6. Engage the platform release lever by rotating it towards the platform.
7. Install the remainder of the payload (lens, zoom and focus controls,
viewfinder, prompter etc).
Stability
WARNING!
When mounting the head on a tripod, it is possible to set the
tripod legs so that the center of gravity of the tilted payload
falls outside the footprint of the tripod, leading to instability.
Use the mid-level or floor spreader to ensure that the tripod legs are spread
sufficiently so that the center of gravity of the tilted payload remains within the
footprint of the tripod.
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

14
20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320
9 18 27 36 45 54 64 73 82 90 100 109 118 127 136 145
12
10
8
6
4
2 51
102
152
203
254
305
0
CAMERA WEIGHT
in mm
lbs
kg
min. 90º 80º 70º 60º
COUNTERBALANCE
±º
EX MODE
120EX
CAMERA CENTER OF GRAVITY
ABOVE PLATFORM
±90° MODE
Balancing The Head
Make sure that the head is level before balancing. Check the bubble level to verify
that the head itself is level and make sure that the platform is also level.
NOTE: It is important that the handle(s) and all camera accessories (lens, zoom and
focus controls, viewfinder, prompter etc.) are fitted in their operational position before
balancing the head. Any equipment fitted or adjusted later can unbalance the head.
Balancing the 120EX head achieves two objectives. First, when a head is correctly
balanced the operator will need a minimum amount of effort to move the head.
Second, once balanced, the head and its payload can be set to any tilt position and
the head will maintain this position with 'hands off'.
The chart below shows the range of load and C of G heights that can be maintained
in balance. The area between the min. and 90° lines (shaded white) corresponds to
load/C of G combinations that can be balanced over the full tilt range of ±90°. The
area to the right of the 90° line (shaded grey) corresponds to the progressively
reducing tilt range with greater load and higher C of G combinations.
Fore And Aft Balance
1. When positioning the payload, it is important to be aware of the potential
danger that an unbalanced payload will fall away suddenly. Always be prepared
for this by maintaining a firm hold on the payload until the balance is set
correctly.
2. Make sure that the camera and all accessories are installed in their operating
positions.
3. Before disengaging the tilt lock pin, press the Display actuator button and press
and turn the Counterbalance crank to set the counterbalance to 50%.
Depending on the payload weight, it may be necessary to increase or decrease
this setting to enable the payload to be correctly balanced fore and aft.
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

15
4. Make sure that the tilt lock pin is engaged.
5. Set the tilt fluid drag adjustment knob to 0.
WARNING!
Be prepared to prevent the head falling away suddenly. In the
event of the head falling away violently, increase the setting on
the balance adjustment knob.
6. Holding the handle to steady the platform, disengage the tilt lock pin.
7. Tilt the platform forwards and backwards and determine if camera package is
front or back heavy.
8. If it is not in balance, re-engage the tilt lock pin.
9. Release the safety latch and disengage the platform release lever. The next
step will depend on the type of mounting plate:
a. OConnor Geared Plate: Press in and turn the platform adjustment knob to
move the geared plate forwards or backwards until the payload is balanced
fore and aft. The "pop up" gear will engage the plate gear rack. Pull out the
knob if needed to disengage.
b. Other Mounting Plates: With the help of an assistant, carefully slide the
camera payload and plate forwards or backwards until the payload is
balanced fore and aft.
10. The horizontal balance is correct when no perceptible tilting force can be felt on
the handle with the platform level and with the tilt lock pin disengaged.
11. Fully engage the platform release lever to secure the payload in position. The
red safety button should engage the platform hook.
12. If there is insufficient movement in the sliding plate to achieve balance,
determine which direction the mounting plate needs to be moved to achieve
correct balance. Remove the payload from the head, reattach the mounting
plate to the camera in the required position, remount the load and repeat the
horizontal balancing procedure.
13. The sliding plate is marked and the platform has graduations. Make a note of
the "balanced" position to simplify re-balancing this particular payload.
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

16
Payload Weight And C of G Height Adjustment
The fore and aft balance must be set before adjusting the payload weight and
C of G height adjustment.
NOTE: If the correct digital balance setting of the payload is known, tilt the
platform to the horizontal position, press the display actuator button and push
in and turn the counterbalance crank until the digital display shows the correct
setting.
1. Using the handle, tilt the platform downwards and upwards. When
correctly balanced, there should be no perceptible tilting force on the
handle at any angle of tilt and the head should remain in any tilt position
to which it is set.
2. If the head tends to fall away when the platform is tilted, the
Counterbalance will need to be increased. If the head tends to spring
back when the platform is tilted the counterbalance will need to be
decreased.
3. Set the platform level, press the display actuator button and push in and
turn the counterbalance crank to increase or decrease the counterbalance
setting as required.
4. Using the handle, tilt the platform upward and downward to recheck the
balance. Readjust counterbalance until balance is achieved.
5. Make a note of the final counterbalance setting to simplify re-balancing
this particular payload.
6. When the payload weight and C of G height adjustment is complete,
check that the fore and aft balance is still correct. Re-adjust the position of
the sliding plate if necessary.
7. After balancing, exercise the head through the full range of pan and tilt to
confirm that it operates smoothly.
Locking The Platform
The tilt lock pin mechanism is operated by a flip lever on the left-hand side of
the head. To engage the pin, hold the platform in the horizontal position and
flip the lever over from the green position to the red position. If necessary, use
the handle to rock the head slightly to achieve the fully locked position. The pin
and flip lever will snap towards the platform as the pin engages.
To release the tilt lock pin, flip the lever over from the red position to the green
position. If the platform is not balanced this may require force. If so, make sure
that the tilt lock lever is rotated clockwise to hold the platform in place.
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

17
Pan And Tilt Locks
The pan and tilt friction locks are operated by levers on the left of the head.
The locks should be applied whenever the camera/head is left unattended.
Rotate the pan lock lever clockwise (toward the front of the head) to engage
the lock.
Rotate the tilt lock lever counter clockwise (upwards) to engage the lock.
If the lock does not fully engage at the end of the lock lever travel, refer to
"Adjusting The Lock Levers" in the Servicing section below.
Pan And Tilt Fluid Drag
Both the pan and tilt mechanisms incorporate the OConnor ultra smooth fluid
drag system to ensure smooth movement. Control knobs on the right side of
the head are used to adjust the drag settings over the range of 0 to 9. The pan
drag knob is the smaller one at the base of the head. The larger tilt drag knob
is in the center on the tilt drag housing. To increase drag, turn the knob
clockwise, towards a higher setting. To decrease drag, turn the knob counter-
clockwise, towards a lower setting
The Balance Display
The balance display is enabled by the display actuator button. It remains active
for approximately 15 seconds after adjustment of the counterbalance crank has
finished
Low Battery
The balance display will flash when the battery requires replacement.
(See "Battery Replacement" in the Servicing section below.)
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

18
Servicing
General
The 120EX pan and tilt head is robustly made to high engineering standards and
little attention is required to maintain serviceability except for regular cleaning.
For service beyond the maintenance items described below, contact the
OConnor headquarters or your local O'Connor representative. Contact
information is provided at the end of this document.
Routine Maintenance
Replace the electronic unit battery whenever the low battery indicator flashes.
During normal use, check the following:
Check the effectiveness of the pan and tilt locks. Reset as necessary – see
below.
Check the operation of the balance mechanism digital display and the
illumination of the bubble level. Replace the battery if necessary – see below.
No other routine maintenance is required.
Cleaning
During normal operation the only cleaning required is a periodic wipe down with
a lint-free cloth. Any dirt that accumulates during storage or periods of non-use
may be removed with a semi-stiff brush. Particular attention should be paid to
the dovetail faces of the camera mounting area.
NOTE: Use only detergent-based cleaners. DO NOT use solvent-based or oil-
based cleaners, abrasives or wire brushes to remove accumulations of dirt as
these will damage the protective surfaces.
Use out-of-doors under adverse conditions may require special attention and the
head should be covered when not in use. Salt spray should be washed off using
fresh water at the earliest opportunity. Sand and dirt act as an abrasive and
should be removed using a semi-stiff brush or a vacuum cleaner.
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

19
Battery Replacement
The battery powers the digital display and illuminates the bubble level. It should
be replaced whenever the display flashes.
NOTE: Replacement of the battery will not affect the calibration of the balance
mechanism display.
1. Use a flat blade screwdriver to remove the 3 slotted screws in the battery cover
and remove the cover.
2. Carefully pull the battery out of its compartment as far as the wiring will allow.
3. Pull the connector off the terminals of the old battery and push it onto the
terminals of the new battery. For longer battery life it is recommended that you
use a 9v lithium battery. However, a standard 9v battery can also be used.
4. Replace the battery in its compartment, making sure that the wiring is not
twisted or pinched.
5. Replace the battery cover and tighten the 3 slotted screws.
6. Press the display actuator button and verify that the digital display and bubble
level are lit for approximately 15 seconds.
Battery Cover
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering

20
Balance Mechanism Calibration
The digital display indicates the setting of the balance mechanism on a scale of 0
(minimum setting) to 182 (maximum setting). In the unlikely event of this system
requiring calibration, proceed as follows:
1. Level the platform and engage the tilt lock pin.
2. Press and hold the Display Actuator button for 20 seconds to enable
calibration mode.
3. 'CAL' is displayed for 2 seconds then '0' flashes. Adjust the Counterbalance
crank to the '0' end of travel and press and release the Display actuator
button.
4. When '182' flashes, adjust the Counterbalance crank to the '182' end of
travel and press and release the Display actuator button.
5. If the calibration is successful, the set points are saved in Flash memory and
the display turns Off.
6. 'Err' is displayed for 2 seconds if the calibration fails. A failure will occur if
insufficient balance stroke was measured and set. Ensure that the end of
travel is used when setting maximum and minimum balance points.
7. Calibration mode will time out after 1 minute to save battery life. The system
will revert to the previously stored values.
8. After calibration, re-balance the head.
Adjusting The Lock Levers
If the pan and/or tilt friction locks does not fully engage at the end of the lock lever
travel, adjust the lever position as follows:
1. Rotate the lock lever to the "locked" end of travel.
2. Use a 3/32" hex key to loosen the set screw in the lock lever.
3. Pull the lock lever off the hexagonal shaft, rotate it away from the "locked"
end of travel by one flat on the shaft and reinstall it.
4. Tighten the set screw.
Operator's Guide - OConnor 120EX Pan and Tilt Head
www.ocon.com OConnor Engineering