BarTech Focus Device Owners Manual
Contents
1. 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 operators needs The motor calibration does not need to be redone when the direction is changed MOM CONT Switch This switch is used to select the desired operation of the camera run stop relay in the Receiver Amplifier Some cameras such as an ARRI 16SR or 35 lll require the external contact closure to be maintained continuously for as long as the camera is running 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 R2. or BFD has been sold by the hundreds all over the world We hope you will enjoy using it as much as we enjoyed developing it Please feel free to contact us if you have any questions or comments The BED Unit A BFD 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 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 CHANNEL SELECT SWITCH TRANSMITTER TOP VIEW CONTROL KNOB RUN STOP SWITCH FRONT VIEW FORWARD REVERSE SWITCH POWER LED MOMENTARY CONTINUOUS SWITCH POWER SWITCH POWER IN CONNECTOR DATA OUT CONNECTOR BOTTOM VIEW BATTERY COMPARTMENT DOOR Page 2 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
3. 00 pm Fax 815 364 5240 e mail jim bartechengineering com Page 11
4. 5 REPEAT STEP THREE FOR THE OTHER WHEEL SETTING THE OTHER END OF TRAVEL POINT 6 RETURN THE TOGGLE SWITCH TO THE CENTER POSITION TURN THE TRANSMITTER ON ROTATING THE KNOB OR MOVING THE SLIDER END TO END ON THE TRANSMITTER SHOULD CAUSE THE LENS TO MOVE FROM ONE END POINT TO THE OTHER END POINT IF THE DIRECTION OF LENS ROTATION IS THE OPPOSITE OF WHAT IS DESIRED SET THE FORWARD REVERSE TOGGLE SWITCH ON THE TRANSMITTER TO ITS OTHER POSITION Page 6 Receiver Amplifier LED STATUS LED This red green has three modes of operation Red The unit is on but not receiving a signal from the Transmitter Green The unit is on and receiving a signal from the Transmitter Flashing Red Green In calibration mode the toggle switch is not in the center operate position Note When the signal is being interfered with and reception is intermittent the LED may appear a yellow orange color as it switches back and forth rapidly between red and green Receiver Amplifier Connectors PWR Connectors There is a 2 pin power input output connector at each end of the Receiver Amplifier unit Either one may be used for connection to an external 11 to 17VDC power source If two BFD s are being used and only one power source exists plug the second Receiver Amplifier s cable into the unused power connector on the first one Pin 1 is positive pin 2 is negative DATA IN Connector This 3 pin connector is provided to allow direct connection of the Transm
5. POT WIPER 4 COM 4 POT CW END 4 POT CW END 5 MOTOR Page 10 Transmitter Specifications Dimensions Weight approx 7 by 372 by 3 approx 1 Ibs 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 903 37 906 37 907 87 909 37 912 37 915 37 919 87 921 37 Resolution 10 bits 1024 steps all steps always used Data Update Rate 300 transmissions second Transmission Delay 2 7 milliseconds Receiver Amplifier Specifications Dimensions Weight approx 472 by 37 by 17 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 NOOR WN O Lemo Connector Part Numbers Connector Receptacle Plug Power Trans amp Rcvr Amp ECG 0B 302 CLL FGG 0B 302 CLAD42 Data In Out Trans amp Revr Amp ECG 0B 303 CLL FGG 0B 303 CLAD42 Pot Input Rcvr Amp ECG 0B 304 CLL FGG 0B 304 CLAD42 Motor Output Rcvr Amp ECG 1B 305 CLL FGG 1B 305 CLAD62 Camera Run Stop Revr Amp ERD 0S 304 CLL FFA 0S 304 CLAC42 An excellent source for Lemo compatible connectors is Custom Interface Technology in Los Angeles CA Call 323 222 6401 Technical Support Address any technical question to BarTech Engineering 5285 East Appian Way Long Beach CA 90803 Tel 562 987 9159 M F 9 00 am 5
6. BARTECH Focus DEVICE BarTech Focus Device Owners Manual Table of Contents Iniroductienmae Tct 2 Erotic RR A dd ASA Arian talaga salad coo o ooo o p 2 Transmitter Controls u o kou kde a EG ko hist ER uk opel VY M Hip ooo rapi de 3 Trains Miller INGICALONS RS 4 Transmitter Connector P 4 Transmitter BACT Ye e ecoute bl a ud e rod G EIE E tie AES 4 aon set s gustu cae UE RN DO Ja C 4 Receiver Amplifier Controls 5 Calibration Procedure cae case n ete de Seed isto E to eb ue deis 6 Receiver Amplifier LED is d tas Sa au ir RON RADO T Cu Ure we CEP AR CO en eO ERE CR BORRADA NOR 7 I eceiver Amplifier Connectors 7 Other Things tO KNOW E M 8 kasa M ao OO dun dde des usb PEE 8 Troubleshooting sesasi P 9 Connector PInOUL ee erie ates ROA a E rex el gs oo 10 SDGCITEBHOEL a Gn EO d Pup ER sa outs ush ilhan ad s 11 Technical SU POON nu Decree p ncc daa qo n OA Ebr CoD ete bon DA pa 11 Page 1 Introduction Congratulations You are now in possession of one of the most popular wireless follow focus systems in the world Since its introduction in 1999 the BarTech Focus Device
7. N it moves a little and stops Set the CON MOM switch to CON See page 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 BFD is set to RUN it momentarily closes a relay to simulate the camera buttom 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 vice versa To get the camera and BFD back into synchronization start or stop the camera one time by using the pushbutton on the camera instead of the BFD 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 Page 9 Connector Pinout TRANSMITTER BOTTOM POWER DATA IN 00 POWER IN p 4 DATA OUT 4 1 7TO15VDC t GROUND 2 GROUND 2 RF SHUTDOWN SHORT TO GROUND 3 DATA OUT RECEIVER FRONT PWR p 7 DATA IN p 7 1 11 TO 17 VDC 1 GROUND 2 GROUND 2 RF SHUTDOWN SHORT TO GROUND 3 DATA IN RECEIVER BACK qom seasan O CAM p 8 PWR p 7 POT p 7 MTR p 7 1 N C 1 411 TO 17 VDC 1 NIC 1 MOTOR 2 N O 2 GROUND 2 POT CCW END 2 POT CCW END 3 COM 3 POT WIPER 3
8. ave power reduce heat generation and prevent motor jumping due to stray RF interference the Receiver Amplifier turns off the motor driver circuitry 1 5 seconds after the motor reaches its desired position After 7 seconds of trying unsuccessfully to reach the desired position the motor will be turned off to prevent damage to the motor or BFD 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 15 minutes the RF transmitter is turned off to save power and the power LED blinks green Changing any control or moving the knob turns the transmitter back on within 15 1000 of a second When in the lower power mode a fully charged 9V battery will last over 60 hours Warranty BarTech Engineering warranties the BFD for manufacturing defects or component failure under normal operation for 1 year from the date of purchase BarTech Engineering will pay shipping UPS ground within the United States to return the unit after repairs Page 8 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 e 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 e Check that the tran
9. ctors POWER IN Connector This 2 pin connector is provided to allow the BFD 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 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 amp video cameras The unit has a toggle switch for power a rotary switch for channel selection a 3 position toggle switch and two barrel
10. eceiver 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 As a general rule use the highest number that works in order to minimize interference from video transmitters If two BFD 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 amp 6 Also do not use channels 3 amp 7 simultaneously as you may get interference Page 3 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 Transmitter Conne
11. he pot wiper Page 7 CAM Connector This 4 pin camera run stop connector is used to put film or video cameras in the run mode and stop them Special cables are required for each camera This connector is compatible with the Seitz system Pin 2 is the normally open relay contact and pins 3 amp 4 are the relay common Note As a special order this connector can be replaced by a 2 pin connector for compatibility with WRC 4 and modified Seitz units If the 2 pin connector is used Pin 1 is the normally open relay contact and pin 2 is the relay common 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 Use the highest channel on the BFD that is interference free Keep as much metal such as the camera body between the Video transmitter and the BFD Receiver Amplifier 4 Keep the video transmitter antenna and cables as far away from the BFD antenna and cables as possible GO N Motor Driver Shutdown In order to s
12. itter 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 input line MTR Connector The 5 pin motor connector is used to connect the Receiver Amplifier to a lens drive motor The pin assignments are 1 for 1 compatible with Seitz and WRC 4 systems and Heden and Cinema Products motors POT Connector This 4 pin connector is provided to allow direct connection of a 10K control potentiometer to be used instead of the transmitter This way a very small control knob may be placed anywhere convenient for the operator When used this way the Receiver Amplifier becomes a direct analog servo control system like a Preston Micro Force The calibration knobs still set the ends of lens travel but the calibration is slightly different The calibration toggle switch has no effect and should be set in the middle position Simply move the remote pot control all the way to one end of its travel At this point one of the calibration wheels will have a large effect on its operation and one will have little effect Use the one which has a large effect to set the end of motor travel point Move the remote pot to the other end of its travel and repeat with the other wheel Pins 2 amp 4 are connected to the pot s end points and pin 3 to t
13. ration procedure Page 5 END POINT ADJUSTMENT WHEEL S POSITION TOGGLE SW END POINT ADJUSTMENT WHEEL 7 END POINT ADJUSTMENT WHEEL 3 POSITION TOGGLE SW END POINT ADJUSTMENT WHEEL V END POINT ADJUSTMENT WHEEL 3 POSITION TOGGLE SW END POINT ADJUSTMENT WHEEL 7 END POINT ADJUSTMENT WHEEL 3 POSITION TOGGLE SW END POINT ADJUSTMENT WHEEL VT c END POINT ADJUSTMENT 3 POSITION TOGGLE SW END POINT ADJUSTMENT WHEEL END POINT ADJUSTMENT WHEEL 3 POSITION TOGGLE SW END POINT ADJUSTMENT WHEEL lt x lt BFD CALIBRATION PROCEDURE 1 WITH THE TRANSMITTER OFF THE LENS DRIVE MOTOR NOT INTERLOCKED WITH THE LENS AND THE TOGGLE SWITCH IN CENTER POSITION ROLL BOTH WHEELS TOWARD THE TOGGLE SWITCH AS FAR AS THEY WILL GO 2 PRESS THE TOGGLE SWITCH TOWARDS ONE OF THE WHEELS THE LENS DRIVE MOTOR WILL MOVE TO THE CENTER OF ITS RANGE OF TRAVEL ROTATE THE LENS TO THE CENTER OF THE DESIRED RANGE OF TRAVEL AND INTERLOCK THE MOTOR TO THE LENS 3 BEGIN ROTATING THE WHEEL THAT THE SWITCH WAS PRESSED TOWARDS THE MOTOR WILL BEGIN TURNING THE LENS CONTINUE TURNING THE WHEEL UNTIL THE LENS JUST REACHES THE DESIRED POINT EITHER THE END OF LENS TRAVEL OR A DESIRED MARK 4 PRESS THE TOGGLE SWITCH ALL THE WAY TOWARDS THE OTHER WHEEL PAST THE CENTER POSITION THE MOTOR WILL RETURN THE LENS TO THE ORIGINAL STARTING POINT
14. shaped thumb wheels for calibrating the lens drive motor s range of travel to the desired range of lens travel one LED and six connectors Page 4 POWER IN OUT CONNECTOR POWER ON OFF SWITCH CHANNEL SELECT SWITCH FRONT VIEW DATA IN CONNECTOR SIDE VIEW END POINT ADJ WHEEL CALIBRATION SWITCH TOP MIEMW END POINT ADJ WHEEL POWER IN OUT CONNECTOR MOTOR CONNECTOR REAR VIEW CAMERA START S TOP CONNECTOR REMOTE CONTROL POT INPUT STATUS LED Receiver Amplifier Controls ON OFF Switch This switch controls power to the Receiver Amplifier 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 As a general rule use the highest number that works in order to minimize interference from video transmitters If two BFD 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 amp 6 Also do not use channels 3 amp 7 simultaneously as you may get interference Calibration Switch and Thumbwheels These controls located on the side or the Receiver Amplifier are used to set the end points of travel of the lens drive motor that correspond to the range of travel of the Control Knob on the Transmitter See following page for the calib
15. smitter and receiver amplifier are set to the same channel e lf 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 e 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 BFD When the BFD 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 BFD tries to move the motor the power shuts down to prevent burnout which causes the BFD to shut down This in turn causes the power draw to drop off which allows the accessory power to rise back up and the cycle repeats itself 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 RU
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