Checkline MVC-4000 - Manual (Page 6)

6
0 8. The strobe should pulse at 20 pps.
0 9. Allow the cover interlock switch to return to the downward position.
This will cut off power to the unit.
10. Turn the veristor HV ADJ control through its complete range, stopping
at intervals to lift the cover interlock switch. Observe that light output
variations occur over the total range of th HV ADJ control
11. Return the TEST/RUN Switch to RUN position. Return the EXT/.INT
Reference Switch to the EXT REF position.
4.0 E XTERNAL O PERATION
Operate the AS4000 Series Strobe in a production environment using the following
procedure
1. Mount the AS4000 Series unit on a stable base in a location convenient to
the production line to be viewed
2. Using option Nosepiece Adapter, connect a fiber-optic cable to the AS4000 Series
light output port. Position the cable to distribute light to the desired area.
3 Lift the lid, opening the enclosure.
4. Place the TEST/RUN Switch in the RUN position.
5. Place the EXT/INT Reference Switch in the EXT/REF position
6. Close and secure the cover.
7. Connect power to the unit.
8. Connect a signal level input cable to the connector at the rear of the unit.
9. Connect the signal level input cable to a CCD/CID camera system that
will provide TTL pulses to initiate flashes.
The system in now set to stop motion in the desired industrial vision application.
7
5.0 C IRCUIT D ESCRIPTION
5.1 Normal Operation (RUN MODE)
The AS4000 Series strobe is made up of four functional circuit elements.
1. AS3906 Power Supply Board
2. AS3907 Voltage Control Board
3. AS3908 Add-On Board
4. Flashlamp storage capacitor and triggering circuit
A power cable supplied with the unit provides input power. A signal level input
cable supplied by the customer provides operational support.
An energy storage capacitor stores energy provided by the AS3906 Power
Supply Board. A trigger pulse discharges the capacitor into the flashlamp
causing the lamp to flash.
The Power Supply Board recharges the energy storage capacitor during the
interval between flashes.
During normal operation, the lamp will flash a maximum repetition rate of 60
when a trigger input pulse is applied between pins I and 3 of the signal input
connector.
A transformer in the flashlamp circuit senses flashlamp current. Pins 3 and 5
of the signal input connector monitor the resulting signal. This signal is
12 volts high with a width approximately th same as the light pulse (5 µS),