(Wireless Follow Focus) VZ-WFF Instruction Manual Technical Support Address any technical question to: VariZoom Tel: (512) 219-7722 (M-F 8:30 am/ 4:30 pm Central) Website - www.varizoom.com pg. 23 Resolution: 12-bits (4096 steps), all steps always used. Data Update Rate: 300 transmissions/second Transmission Delay: 2.7 milliseconds Table of Contents Introduction......................................................................4 Transmitter......................................................................5 Transmitter Controls...........................................................6 Transmitter Indicators.........................................................8 Transmitter Connectors.......................................................8 Transmitter Battery..............................................................9 Receiver/Amplifier..............................................................9 Receiver/Amplifier Controls.................................................11 Calibration Procedure.........................................................12 Receiver/Amplifier LED......................................................13 Receiver/Amplifier Connectors.............................................13 Receiver/Amplifier Specifications Dimensions/Weight: approx. 4½" by 3½" by 1½" / approx. 11 oz. Power Consumption: 50 milliamps @ 11-17VDC (Motor off) up to 3 amps max when driving a motor Power Output to Motor: 2 amps maximum @ 18 VDC (36 watts) Lemo Connector Part Numbers Connector Plug Power (Trans. & Rcvr/Amp) FGG.0B.302.CLAD42 Data In/Out (Trans. & Rcvr/Amp) FGG.0B.303.CLAD42 Pot Input (Rcvr/Amp) FGG.0B.304.CLAD42 Motor Output (Rcvr/Amp) FGG.1B.305.CLAD62 Camera Run/Stop (Rcvr/Amp) FFA.0S.304.CLAC42 Receptacle ECG.0B.302.CLL ECG.0B.303.CLL ECG.0B.304.CLL ECG.1B.305.CLL ERD.0S.304.CLL Other Things to Know.................................................................16 Warranty..........................................................................17 Troubleshooting................................................................18 Connector Pinout..............................................................20 Specification.....................................................................22 Technical Support.............................................................23 An excellent source for Lemo compatible connectors is Custom Interface Technology in Los Angeles, CA. Call 323-222-6401. pg. 22 pg. 3 The WFF Unit A WFF unit consists of a hand-held Transmitter control, a Receiver/Amplifier motor driver unit, and a power cable. To control a lens, a lens drive motor and motor cable are required. To start and stop a camera a remote control, or "run/stop" cable is required. RECEIVER BACK The Transmitter The transmitter control unit, called just the "Transmitter", is a small, lightweight, hand-held unit that enables the operator to remotely control one lens function, such as focus or iris, and start or stop the camera. The Transmitter has one main lens control knob (either a rotary knob or a slider) three toggle switches for power and setup, one rocker switch for camera on/off, one rotary selector switch for channel selection, two LED's, two connectors and one 9V battery. CAM(p. 8) 1: N/C 2: N.O. 3: COM 4: COM PWR(p. 7) 1: +11 TO 17 VDC 2: GROUND POT(p. 7) MTR(p. 7) 1: N/C 1: MOTOR ­ 2: POT CCW (-) END 2: POT CCW (-) END 3: POT WIPER 3: POT WIPER 4: POT CW (+) END 4: POT CW (+) END 5: MOTOR + Transmitter Specifications Dimensions/Weight: approx. 7" by 3½" by 3" / approx. 1½ lbs. Power Consumption: 30 Milliamps @ 7 to 15 VDC (9 milliamps in low power mode) RF Transmission: 902-928 MHZ Single frequency, part 15 FCC compliant: Channel Freq.. (MHZ). 0 903.37 1 906.37 2 907.87 3 909.37 4 912.37 5 915.37 6 919.87 7 921.37 pg. 4 pg. 21 Connector Pinout TRANSMITTER BOTTOM POWER IN (p. 4) 1: +7 TO 15 VDC 2: GROUND DATA OUT (p. 4) 1: GROUND 2: RF SHUTDOWN (SHORT TO GROUND) 3: DATA OUT RECEIVER FRONT PWR (p. 7) 1: +11 TO 17 VDC 2: GROUND DATA IN (p. 7) 1: GROUND 2: RF SHUTDOWN (SHORT TO GROUND) 3: DATA IN pg. 20 pg. 5 Transmitter Controls Control Knob: Each Transmitter has one main control knob, either a rotary knob or a linear slider. Once the lens drive motor has been calibrated to the lens at the Receiver/Amplifier, end-to-end travel of the knob moves the lens through the range set during calibration. The travel can be set to be the entire range of lens movement or between two intermediate points, as desired by the operator. An important point to note is that the smaller the range of travel of the motor, the more accurate the system becomes. (This is the opposite of all other systems currently in use, which have either a fixed accuracy or get less accurate as the range is reduced) POWER Switch: The power switch turns power on and off to the Transmitter. FWD/REV Switch: This switch reverses the direction of travel of the lens drive motor in response to a movement of the control knob. The forward/reverse designations are completely arbitrary, so simply choose whichever matches the operator's needs. The motor calibration does not need to be redone when the direction is changed. When I switch the transmitter on the light on the receiver turns green but moving the knob on the transmitter doesn't make the motor move. The most likely cause of this is that both calibration knobs are in the start position (rolled all the way towards each other). This makes the range of motor travel nothing. Follow the calibration procedure on page 6 first try moving the knob on the transmitter. When I switch the camera to "RUN", it moves a little and stops. Set the "CON/MOM" switch to "CON". See page 3 for a description of this switch's operation. When I switch the camera to "RUN" it stops, and when I set it to "STOP" it runs. This can occur when using a camera that has one pushbutton for both starting and stopping the camera. When the switch on the WFF is set to "RUN" it momentarily closes a relay to simulate the camera button being pushed. It does the same thing when set back to "STOP". If the camera was already running when the switch was set to "RUN" it will cause the camera to stop and viceversa. To get the camera and WFF back into synchronization start (or stop) the camera one time by using the pushbutton on the camera instead of the WFF. When the signal is just barely getting through (LED flickering between red and green) the motors will occasionally twitch or jump. This can be fixed by upgrading your software. Contact us for more details. MOM/CONT Switch: This switch is used to select the desired operation of the camera run/stop long as the camera is running. pg. 6 pg. 19 Troubleshooting I cannot get the receiver/amplifier to receive the signal from the transmitter (receiver/amp LED stays red or flickers between red and green). There are several possible causes for this: · The calibration switch on the receiver is not in the operate (center) position. The LED blinks red/green to indicate you are in calibration mode. · Check that the transmitter and receiver/amplifier are set to the same channel. · If you are using a video transmitter, turn it off and see if you get a good signal. If so, try using a different channel on the video transmitter. If it is a Modulus, be sure to set the lowest channel you can use. · Check around for other sources of RF interference. Cell phones in use in the immediate vicinity can also be a problem. When I switch the calibrate switch towards one of the knobs or when I try to make a fast move the motor moves in short jerks until it reaches position. This is due to insufficient power being supplied to the WFF. When the WFF tries to move the motor to position at full speed it can draw up to 3 amps of current. 12V accessory outputs from cameras, such as an ARRI 435, are limited to less current. When the WFF tries to move the motor the power shuts down to prevent burnout, which causes the WFF to shut down. This in turn causes the power draw to drop off, which allows the accessory power to rise back up and if the cycle repeats relay. Other cameras, such as the Moviecam Compact, require a momentary contact closure to start the camera and another momentary closure to stop the camera. This switch is set to CONT for continuous operation cameras and MOM for momentary operation cameras. RUN/STOP Switch: This switch is used to activate the relay in the Receiver/Amplifier that is used to put a film or video camera in the run or stop mode. CHANNEL Select Switch: This switch is used to select one of the eight frequencies in the 900 MHZ range for operation. The selector switch must be set to the same channel on both the Transmitter and Receiver/Amplifier. Use the highest number that works in order to minimize interference from video transmitters. If two WFF units are being used at once, leave at least one unused channel between the two channels being used, i.e. do not set the units on adjacent channels, such as 5 & 6! Also, do not use channels 3 & 7 simultaneously, as you may get interference. pg. 18 pg. 7 Transmitter Indicators POWER LED: The red/green power LED has four modes of operation: Green: Unit on and transmitting, battery voltage OK. Flashing Green: The unit has not been used for more than 15 minutes, so the RF transmitter has been turned off to save power. Changing any control or moving the knob turns the transmitter back on within 15 /1000 of a second. Red: The LED will turn red approximately 1 hour before the 9V battery needs replacement. Flashing Red: The LED will begin flashing red when the battery voltage has gotten so low the transmitter can no longer function accurately. The RF transmitter will be shutdown to prevent inaccurate operation. RUN/STOP LED: The blue run/stop LED flashes when the camera run/stop switch is in the run position. Warranty VariZoom warranties the WFF for manufacturing defects or component failure under normal operation for 1 year from the date of purchase. VariZoom will pay shipping UPS ground within the United States to return the unit after repairs. Transmitter Connectors POWER IN Connector: This 2-pin connector is provided to allow the WFF Transmitter to be powered by an external battery. The Transmitter will operate on any voltage from 7 to 15 VDC. It draws 30 milliamps of current. Pin 1 is positive, pin 2 is negative. pg. 8 pg. 17 Other Things to Know Interference from Video Transmitters: UHF video transmitters, such as the Modulus 2000 or 3000, tend to broadcast on other frequencies than the intended frequency. This can block the signal from reaching the Receiver/Amplifier. There are several things you can do to prevent this from being a problem: 1. Never use any channel above 50 UHF for transmission. The lower the channel the lesser the chance of interference. Channels below 40 generally do not interfere at all unless the video transmitter is inches away from the antenna on Receiver/Amplifier. 2. Use the highest channel on the WFF that is interference free. 3. Keep as much metal (such as the camera body) between the Video transmitter and the WFF Receiver/Amplifier. 4. Keep the video transmitter antenna and cables as far away from the WFF antenna and cables as possible. Motor Driver Shutdown: In order to save power, reduce heat generation and prevent motor "jumping" due to stray RF interference, the Receiver/Amplifier turns off the motor driver circuitry 0.5 seconds after the motor reaches its desired position. After 3 seconds of trying unsuccessfully to reach the desired position, the motor will be turned off to prevent damage to the motor or WFF unit. Changing the position of the control knob on the transmitter reactivates the motor driver circuitry and resets the timer. Battery Saver: When the Transmitter has not been used for more than 8 minutes the RF transmitter is turned off. DATA OUT Connector: This 3-pin connector is provided to allow direct connection of the Transmitter and the Receiver/Amplifier unit. When connected, the RF sections in both the transmitter and receiver are switched off and the serial data is sent via a cable. Pin 1 is ground, pin 2 is the RF shutdown line that must be connected to pin 1 in the cable, and pin 3 is the serial data output line. Transmitter Battery The Transmitter is powered by a standard 9V battery that is inserted through the bottom plate. An alkaline 9V battery will provide 18 hours of operation. The battery is inserted with the negative contact near the power connector. Inserting the battery backwards will have no effect, the unit simply will not operate. The Receiver/Amplifier The Receiver/Amplifier unit is a small, lightweight unit that is placed near the lens being controlled. It receives the signal from the Transmitter and drives the lens drive motor proportionally to the movement of the Control Knob. It also has a relay that can be used to control the run/stop function of film & video cameras. Th ...