CITY THEATRICAL 1500 Follow Spot Yoke User Manual
- June 4, 2024
- City Theatrical
Table of Contents
CITY THEATRICAL 1500 Follow Spot Yoke User Manual
Getting Started with the City Theatrical Follow Spot Yoke
Congratulations on the purchase of your City Theatrical Follow Spot Yoke. The City Theatrical Follow Spot Yoke is a professional quality device that can provide smooth pan and tilt operation to your lighting fixture. A heavy steel yoke gives mass and prevents vibration, and ball bearings on the pan and tilt create extremely smooth movement, even on very long throws.
The City Theatrical Follow Spot Yoke can be configured for use with the Source
Four™ 19º50º, 10º, and 5º. A track allows the lighting fixture and any
accessories to be balanced for ease of operation.
Mounting your Follow Spot Yoke
The City Theatrical Follow Spot can be mounted in a variety of ways. The bottom of the pan bearing has female 1 ½” NPT pipe threads, and any length of 1 ½” pipe can be threaded into it. Using a 36” piece of 1 ½” pipe threaded into a 50 lb. boom base is a typical method.
The Follow Spot Yoke can be mounted in a variety of positions, such as:
- On a stand of 1 ½” pipe with a boom base
- Underhung from a pipe
- Overhung on a hand rail
These diagrams illustrate three possible hanging methods:
Pipe and base mount
Overhung on handrail
Underhung on pipe
Preparing Your Lighting Fixture
If you are planning to use a 19º-50º or a 10º Source Four, you will need to
remove the shutters from the lighting fixture. This is not necessary, but may
be desirable for a 5º Source Four to prevent the shutter blades from
accidentally being moved during operation. Remove the shutters by removing the
four machine screws which hold the two halves of the Source Four barrel
together and exposing the shutter, pressure plate, and shutter spring parts.
Remove the shutter blades, but reinstall the pressure plates and springs. Do
not reinstall the existing four machine screws into the barrel. Go on the next
step:
Two Angle Brackets allow your Source Four to be installed in the Follow Spot Yoke. Replace the four ETC machine screws with the enclosed #8-32 x 1 ½” pan head Philips machine screws into the Source Four’s existing #8-32 hex nuts.
Next, install the two Tee Slot Extrusions using the enclosed #8-32 x 3/8” flat
head Philips machine screws (three screws per extrusion). For 19º-50º or 10º
Source Four, install the Tee Slot Extrusions with the excess track overhanging
toward the rear of the lighting fixture. For the 5º Source Four, the Tee Slot
Extrusions overhang the Angle Brackets toward the front of the lighting
fixture. See diagrams below.
Note the two Tee Blocks that slide into the Tee Slot Extrusion. Using a 3/16”
Allen key, slightly loosen the two 3/8” x ½” socket head shoulder screws to
free the Tee Blocks.
Carefully insert the Tee Slot Extrusions onto the Tee Blocks. Tighten the tilt
handwheel.
Temporarily tighten the shoulder screws. Install four 4-40 x ¼” pan head
machine screws, one in each end of each Tee Slot Extrusion. These screws serve
as safety devices to prevent the Tee Blocks from accidentally slipping out of
the Tee Slot Extrusion track.
Install the Lens Tube into the Source Four
Install the Lens Tube into the Source Four and install the two #10-32 screws
(one plastic thumbscrew and one Philips machine screw) that hold the Lens Tube
to the lighting fixture.
Plug in the lighting fixture into a switch or dimmer and dress the cable to
insure that it does not restrict the yoke’s movement or its balance. Turn on
the lighting fixture and adjust the sharpness of the beam to the degree that
you think is appropriate.
Balance the Lighting Fixture in the Yoke
The lighting fixture can be adjusted forward or backward in the Tee Slot
Extrusion to establish a perfect balance point. To test the balance, carefully
loosen the tilt locking knob and feel if the fixture is front heavy or back
heavy. To adjust the balance, loosen the two shoulder screws and evenly push
the fixture forward or backward in the Tee Slot Extrusion until it balances
exactly. Lock the shoulder screws again. Test and repeat if necessary.
Using
Theatrical Accessories with Your Follow Spot Yoke
City Theatrical has created a range of accessories to make your Follow Spot
more versatile and easier to operate.
| Part Number | Name | Use |
|---|---|---|
| 2180 | Drop-In Iris | Change size of beam |
| 1520 | Follow Spot Yoke Handle | Provides handgrips at front and/or rear of |
Follow Spot.
1360| Follow Spot Handle| Clamps onto rear of Source Four to provide a
handgrip.
1530| Manual Color Changer for 10º Source Four| Manually scrolls six frames of
color
1535| Manual Color Changer for 5º Source Four| Manually scrolls six frames of
color
1410| Drop-In Boomerang for 19º- 50º Source Four| Manually changes six frames
of color
| |
---|---|---
2180| 1520| 1360
| |
1530| 1535| 1410
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