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1. CITY THEATRICAL U N C 1500 Follow Spot Yoke Rev 1 1 2004 City Theatrical Inc 475 BARELL AVENUE CARLSTADT NJ 07072 800 230 9497 201 549 1160 201 549 1161 FAX www citytheatrical com City Theatrical Follow Spot Yoke 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 19 50 10 and 5 A track allows the lighting fixture and any accessories to be balanced for ease of operation Mounting Angles one left and one right Tee Slot Extrusion one set of two pieces 10 long Shoulder Screw 3 8 x V2 5 16 18 thread 3 16 Allen key Tilt Handwheel Yoke Pan Lock Knob Pan Bearing City Theatrical Follow Spot Yoke 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 1 2 NPT pipe threads and any length of 1 1 pipe can be threaded into it Using a 36 piece of 1 12 pipe threaded into a 50 Ib boom base is a typical method
2. of the lighting fixture For the 5 Source Four the Tee Slot Extrusions overhang the Angle Brackets toward the front of the lighting fixture See diagrams below Angle Bracket Tee Slot Extrusion 8 32 x 3 8 Flat Head Machine Screws three For 5 Source Four For 192 502 or 10 Source Four Tee Slot Extrusions overhang toward front of Tee Slot Extrusions overhang toward rear of lighting fixture Shutters may or may not be lighting fixture Shutters must be removed removed City Theatrical Follow Spot Yoke Installing the Source Four into the Follow Spot Yoke 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 2 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 4 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 Tee Slot Extrusion Shoulder screw Tee Block Tilt handwheel 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
3. The Follow Spot Yoke can be mounted in a variety of positions such as e Ona stand of 1 pipe with a boom base e Underhung from a pipe e Overhung on a hand rail These diagrams illustrate three possible hanging methods Overhung on handrail Pipe and base mount Underhung on pipe City Theatrical Follow Spot Yoke Preparing Your Lighting Fixture lf you are planning to use a 19 50 or a 10 Source Four you will need to remove the shutters from the lighting fixture This is not necessary but may be desirable for a 5 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 4 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 19 50 or 10 Source Four install the Tee Slot Extrusions with the excess track overhanging toward the rear
4. 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 lt Y Adjust balance as needed gt Install two 4 40 x 3 16 machine screws in each track as safety devices to prevent Tee Blocks from sliding through Tee Slot Extrusion City Theatrical Follow Spot Yoke Using Other City 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 2180 Change size of beam Spot handgrip 10 Source Four Source Four 502 Source Four

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