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Troglotech T812 Workshop Manual

Pan & tilt camera
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WORKSHOP MANUAL — T812 Pan & Tilt Camera
Troglotech T812 Pan & Tilt Camera Workshop Manual
Troglotech Ltd
Unit 1, 3 Penns Road
Petersfield
Hampshire
GU32 2EW
Phone +44(0)1730 711240
Phone +44(0)1730 711240
Fax +44 (0)1730 711240
Email info@troglotech.com
Web www.troglotech.com
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Summary of Contents for Troglotech T812

  • Page 1 Phone +44(0)1730 711240 Unit 1, 3 Penns Road Phone +44(0)1730 711240 Petersfield Fax +44 (0)1730 711240 Hampshire Email info@troglotech.com GU32 2EW Web www.troglotech.com WORKSHOP MANUAL — T812 Pan & Tilt Camera Troglotech T812 Pan & Tilt Camera Workshop Manual Page 1...
  • Page 2 Video+ve conductor. The T804 does not need to receive data from the T812 to send out commands - and the T812 does not need to receive data to transmit data back. Currently, the data from the T812 is not used by the T804.
  • Page 3 T812 CAMERA - OVERVIEW Working on the T812 The T812 camera can be disassembled easily using standard tools. The only special tool needed is the T812 C spanner which is used to separate the rod adaptor from the camera head. Tools In addition to the Allen key set, tweezers and screwdrivers, a pair of long-nosed pliers is needed for disassembly of the rod adaptor.
  • Page 4 T812 ROD ADAPTOR BLOCK DIAGRAM Troglotech T812 Pan & Tilt Camera Workshop Manual Page 4...
  • Page 5 There are two top-surface connectors, the 5- way is used for programming, the 3-way can be used to connect to the camera test jig and has Camera+ve, Camera-ve and Video+ve available in that order. Troglotech T812 Pan & Tilt Camera Workshop Manual Page 5...
  • Page 6 This will loosen the threaded boss, the Rod Adaptor can now be unscrewed from the Camera Head. 2). Remove two Pozi-drive screws as shown to the right. Troglotech T812 Pan & Tilt Camera Workshop Manual Page 6...
  • Page 7 6). Remove the pogo PCB by levering the collar can now be removed at the screws with a flat screwdriver 8). Disconnect from rear pogo PCB 7). Remove all eight securing screws Troglotech T812 Pan & Tilt Camera Workshop Manual Page 7...
  • Page 8 On the lower part of the pan assembly is a slipring (812/12) used to pass signals through from the rotate assembly. There is a separate LED PCB that is passive, it only contains two 5W LED’s Troglotech T812 Pan & Tilt Camera Workshop Manual Page 8...
  • Page 9 40 degrees until the pan as- collar more by using the above process sembly stops turning. This will unlock in both directions to release the bayo- the collar from the rotate assembly. net fitting. Troglotech T812 Pan & Tilt Camera Workshop Manual Page 9...
  • Page 10 T812 CAMERA HEAD - PAN DISASSEMBLY 6). Remove 3 x Allen bolts 5). Carefully remove the fibre seal 7). Remove 2 x Pozi screws 8). Carefully lever the pan assembly apart at this interface Troglotech T812 Pan & Tilt Camera Workshop Manual Page 10...
  • Page 11 10). Remove 2 x Allen bolts 2-turns at a time to allow the assembly to be re- moved 10). Cont . 10). Cont . 11). Remove 2 x Allen bolts to remove 11). Cont ... LED PCB Troglotech T812 Pan & Tilt Camera Workshop Manual Page 11...
  • Page 12 16). Remove 4 x slotted screws to re- by removing 4 x slotted screws on the move 812/08 PCB brass ring. The sensor PCB can be accessed by removing 4 x slotted screws on the plastic ring Troglotech T812 Pan & Tilt Camera Workshop Manual Page 12...
  • Page 13 PCB has been secured to the assembly. Ensure the brushes do not insertion protrude from the rear of the PCB and trim to 0.3mm if required. Troglotech T812 Pan & Tilt Camera Workshop Manual Page 13...
  • Page 14 The fibre seal must be fitted to the pan assembly and not the rotate assembly as the seal will be torn by the bayonet lugs. Troglotech T812 Pan & Tilt Camera Workshop Manual Page 14...
  • Page 15 3). Pull the rotate clutch from the ro- on the brass motor block tate assembly 5). Lift the motor block upwards slightly 6). Remove the two upper Pozi screws and outwards. Troglotech T812 Pan & Tilt Camera Workshop Manual Page 15...
  • Page 16 9). The pan pogo PCB (812/05) is secured by 3 x Pozi panhead screws. Re- move these and manipulate the PCB past the magnet housing. This can only be removed when the 812/04 rotate PCB is not present Troglotech T812 Pan & Tilt Camera Workshop Manual Page 16...
  • Page 17 T812 CAMERA - FAULT FINDING T812 Camera Head Block Diagram Troglotech T812 Pan & Tilt Camera Workshop Manual Page 17...
  • Page 18 T812 CAMERA - FAULT FINDING Fault Finding The T812 mechanical design is extremely robust with large, sealed bearings and machined-from-solid Stainless Steel housings. To complement the mechanical design, the electronics have protection for the IIC Bus on each PCB and the introduction of a new video output buffer that is proof against shorts to 24V and 0V.
  • Page 19 T812 CAMERA - FAULT FINDING T812 Camera—Fault Finding Although the T812 camera initially appears very complicated, the electronics and metalwork assemblies are modular, each sub assembly or PCB has a well-defined purpose. The electronics and software are designed so that the start-up routine exercises each of the motors (pan, rotate and counter-rotate) and initialises the liquid-lens to focus at around 6”.
  • Page 20 (where it connects to the Rod Adaptor) through to the pogo’s at the bottom of the rotate bowl. The same sequence of connections are employed at the junction between the Rod Adaptor and the Camera head. Troglotech T812 Pan & Tilt Camera Workshop Manual Page 20...
  • Page 21 Using this method, the liquid-lens assembly and rotate the locking collar signals and signals and voltages to/ anti-clockwise to lock from the camera sensor can be meas- ured on the 812/14 PCB Troglotech T812 Pan & Tilt Camera Workshop Manual Page 21...
  • Page 22 (RCR) as can the initial positions of the counter rotate and pan. The RCR is ex- plained at the end of this section. However, if the initial focus position has changed from the standard 6” - infinity setting as calibrated by Troglotech, damage to the lens assembly should be suspected.
  • Page 23 The ability to keep the picture upright depends on a number of other assemblies func- tioning correctly. The rotational position of the T812 cam- era is measured by the inclinometer (IC2 on 812/04), the signals from this are computed into a 0 - 355 degree value by the dedicated processor IC4.
  • Page 24 812/10 PCB. If the pan fails to turn during the start-up routine but the rotate operates correctly, and the lights are not operating, suspect the 15.6V supply. Troglotech T812 Pan & Tilt Camera Workshop Manual Page 24...
  • Page 25 If the camera successfully rotates the pan mechanism and the counter-rotate dur- ing the start-up routine but the rotate mechanism fails to upright after 20 seconds the fault will be on the rotate PCB. Troglotech T812 Pan & Tilt Camera Workshop Manual Page 25...
  • Page 26 If video is present at the junction of R31, R40 and R43, check for correct voltages on IC30 and the presence of video on Pin7 and at both sides of the output termi- nating resistor R41. Troglotech T812 Pan & Tilt Camera Workshop Manual Page 26...
  • Page 27 Data is added to the video signal by TR1 and TR2, the level is around 600mV above syncs. Data is received and stripped from the video by IC31. Data will not be transmitted from the T812 if the centralise routine fails, in general, if the counter-rotate stops rotating, the centralise routine is finished and data should be received and transmitted.
  • Page 28 PL15 on the 812/22 proc- essor/video buffer PCB. The order of connec- tions is the same as the T800 camera module: Pin1 = Camera+ve (24V) Pin2 = Camera-ve (0V) Pin 3 = Video+ve Troglotech T812 Pan & Tilt Camera Workshop Manual Page 28...
  • Page 29 The LED driver circuit relies on the 15.6V supply being operational. Check for 15.6V at the rod adaptor if the LED’s are not illuminating. If running the T812 on the camera test jig, ensure you have the input set to 24V.
  • Page 30 Pogo or Pogo PCB will need to be replaced Troglotech use contact oil rather than grease during construction of the camera, we have found that this provides better lubrication and less wear. A very small amount is needed to provide adequate lubrication, the oil should not bead, but just lightly coat the sliprings.
  • Page 31 T812 CAMERA - T804 COMPATABILITY Compatibility with the T804 system The control of the T812 camera by the T804 system requires that the TC8040911 is at Issue F and is loaded with Software Version 3. The software version is seen on the T804 screen when the T804 is first switched on.
  • Page 32 Have the T812 on a flat surface so that the camera is level (not pointing up or down), and so that the pan mechanism is...