OPERATIONAL SEQUENCE
2.1 This Sequence of Operations assumes that the totaliser has been adjusted for the vending price and that the studio is in a green light condition. Should you look at the latching relays, the one on the left has contacts in the up position. The one on the right has contacts in the down position, as shown in Figure 2.1 below ”Studio ready for Customer”.
2.2 Normally coins, tokens, or notes, are fed into the money system and validated by this device until the correct vend price is reached.
When the correct vend price has been reached the totaliser sends a pulse to the start relay, that is situated within the camera relay assembly unit. The coin counter is also pulsed and adds ‘one vend.
2.3. The start relay sets and energises the coil K of the green light latching relay. ‘The left contact goes to the down position, see ”Start Relay Energises – Coil K”.
2.4 Because the green light latching relay is now set to the down position. (Contact B open and C closed).
* The green light goes out.
* The coin mechanism is disabled.
* The strobe generator charges up the capacitor power packs
* Power is switched to the Omron timer, located in the camera relay assembly.
* The totaliser resets, but does not display the vend price.
2.5 The timer runs for the time selected on the dial, this is normally set to three seconds. This timing allows the strobe generator to charge the capacitor packs, and the customer to pose for the first photograph.
2.6 When the delay period on the timer has lapsed, power is supplied from the timer to the camera motor housed in the camera unit.
2.7 The camera motor now tums and rotates the Geneva Drive in a clockwise direction.
2.8 On the Geneva Drive shaft the red light cam rotates and closes the pose light microswitch. This is timed to be on just before each exposure.
2.9 The pose light microswitch also supplies power to the white border light. This light exposes the paper through the H section of the border box frame forming part of the photograph border. Ilumination is controlled for border exposure, by the potentiometer.
2.10 The Geneva Drive continues rotating and the drive pin engages with, and turns the rear Geneva gear. This Geneva gear (which is attached through gearing to the camera shutter shaft) rotates, opening the camera shutter.
2.11 When the camera shutter is fully open, a roller on the flash (bright light) microswitch, drops into a V notch in the flash light cam on the rotating shaft.
2.12. The flash operates, and the image of the subject is reflected through the mirror and lens; and is exposed onto the paper which is held in the lens housing. The strobe generator then
recycles.
2.13 The Geneva Drive disengages from the rear gear after it has turned it one-quarter-turn. It then engages into the front Geneva gear which is connected to the paper rollers, these revolve moving the exposed paper strip down one frame length, into the feed-down unit.
2.14 On the first movement of the front Geneva gear shaft, the double disc cam shaft rotates closing the camera stop microswitch. A secondary source of power is now supplied to the camera motor as the primary source will be removed later.
2.15 The Geneva Drive has now turned 360 degrees and continues on its rotational path for the second and third photographs until, (on the third movement of the front Geneva gear), the flat surface on the double disc cam closes the transmission microswitch momentarily.
2. 16 Simultaneously, the transmission latching relay, sets to the up position, (through coil L) and resets the green light latching relay, to the up position, (through coil J).
See Figure 2.2″ After third movement…”
2.17 When the green light latching relay resets, the green light and coin mechanisms are not supplied with power, because the circuit is open at contact H. Contact B is closed, so that when contact H closes later, power will pass.
2.18 — The primary source of power to the camera is cancelled. The camera continues to run through its secondary source of power
(through the camera motor stop microswitch on the double disc cam).
2.19 Through contact E power is now sent to the trigger coil, (solenoid) which operates the turn-out pin.
2.20 Contact F also routes power to the transmission induction motor, to commence the mechanical transmission process.
2.21 Below the shelf, the transmission drops approximately one inch (25 mm) and turns clockwise. This action provides the second
source of power to the transmission motor. (Through the microswitch on the trigger body opening).
2.22 The paper carrier cam engages the trigger turn-out pin, which turns out a paper carrier, to a position below the feed-down unit.
2.23 As the paper carrier tums out, it pushes the disc-control out of position from under the transmission stop switch.
2.24 The transmission then drops to the bottom of its stroke cycle, which in-tum lowers the empty paper carrier into tank 14 and washes it
2.25 At the same time as the paper carrier is being turned out, the fourth and last movement of the front Geneva gear and double disc cam takes place.
2.26 The camera stop microswitch opens by dropping into a V shaped notch in the camera motor disc on the double disc cam. This breaks
the circuit to the camera motor.
2.27 The gearing in the transmission unit now causes the transmission shaft to bounce five times, and then rise up under the feed-down unit. As it does so, the paper carrier cam closes the feed-down microswitch,
2.28 When the feed-down microswitch closes the following actions happen together:
* The strip counter operates indicating another strip of paper has been used. (This is looked at by the engineer on a routine visit to determine if a new cassette of paper is required).
* The camera knife/guillotine operates and cuts the paper.
* The feed-down motor operates, and feeds the photostrip into the empty paper carrier.
* Coil M of the trigger/transmission relay energises. The contacts on the relay on theright are now in the down position, See Figure 2. 2″ After fourth movement . . .”
2.29 When the trigger/transmission latching relay resets, the power to the trigger coil is cut off, and the turn-in pin, on the trigger, is pulled down, by the trigger return spring.
2.30 The transmission continues to run, as it is supplied with a second source of power routed through the open transmission stop switch on the trigger body.
2.31 At this point contact H also closes, to complete the green light circuit to the strobe generator. This has the effect of stopping any further charging-up of the capacitor packs until
the green light circuit is broken again.
2.32 The coin mechanism is now enabled and the totaliser displays the full vend price. (Should the next customer wish to use the Studio at this point they may do so.)
2.33 The transmission unit now continues a sequence of dipping the carrier through the various tanks, in a clockwise direction.
2.34 At the end of the development process, the paper carrier is taken-up to the delivery unit. ‘The bend on the paper carrier connects with the arm on the unit, which closes the microswitch,
This starts the delivery unit motor, and the drying unit, through an adjustable timer.
2.35 The developed photostrip is now transferred through the delivery unit rollers to the drying area, to be removed by the customer.
2.36 The transmission unit and the empty paper carrier drop down one inch and rotate clockwise. The paper carrier cam engages with
the trigger turn-in pin which returns the paper carrier to a stand-by position against the outside tube of the bumper spring assembly.
2.37 When the paper carrier retums to the stand-by position, the disc control is pulled back to its original position by its return spring.
The next time the transmission unit rises to the top of its stroke, the disc control will close the transmission stop microswitch on the trigger body, the power will be cut off and the
transmission motor will stop.
NOTE . .
The green light, and trigger/transmission, relays are mechanical latching type; this means that when an electrical pulse energises one of the two coils, it pulls the latch and holds the contacts in position, until the other coil is pulsed to reset the contacts.
