To operate correctly the flashing
AF-assist lamp on the camera must be set to the correct value for reliable
operation. This is set in SDM Menu -> Advanced Menu -> Serial Comms ->
Unit pulse width should be set to 10 and
Tune msec value, defaults to 22.
Testing has shown that the number
varies with camera type as follows:
||Tune msec value
All cameras with 21 or 23 as the value
will work perfectly well with the default 22 value.
Camera Calibration Routine
The capability to measure your cameras
exact Tune_msec_value is built into every clickPAN-SDM unit. You will need:
4 to 6volt battery
one standard servo
This script, cPS-Cal.bas
In the following procedure the various plugs and sockets on clickPAN-SDM are called:
S0. The plug normally used to power the unit, with an unused white wire - that we now use!
S1 & S2. These are the two servo outputs that form the 2x3pin block on the unit
Follow the following procedure.
Load the script on the camera, and
set up clickPAN-SDM as for normal operation with the battery connected and the sensor
located over the camera AF-assist lamp
unused white wire on the 3pin S0 (or battery) connector to the battery negative
(black) wire. This makes clickPAN-SDM enter the special
calibration mode. This puts the click-PAN-SDM into a special calibration
mode - leave connected throughout the whole test
Connect the servo motor to the S1
output and note the position of the output - this is the "optimum"
position for the servo motor. Once you remember the servo position you do
not need to use the S1 output again, however if you need to be reminded of
the position you can always check the servo on S1 - the signal is always
Move the servo motor to the S2
Use the script and the camera
UP/DOWN keys to vary Tune_msec_value on the camera. With each key-press the
servo should move - try to get it to the same position as when the servo
motor was on S1 back in step 3.
NOTE: Servo movements will be jerky and what is important is where the servo
finally ends up after each key press.
The camera is now set-up. You should
note the number that has been used but the camera will remember this number
anyway. NOTE: Running the script again will set the value again, always stop the
script at the correct value or set it manually in SDM Menu -> Advanced Menu -> Serial Comms ->
Tune msec value.