1. Test overview.

This test is used to calibrate the play of all the gears from the motor to each gear of the film carrier. The scan being done in the reversed direction of the prescan, it is necessary to take into account the change of direction of the motor.
For that, the scanner, while simulating a phase of scanning, will make several measurements of this play and will take the maximum value found.
If the play is incorrectly calibrated this may cause problems in image framing, see ADDR.

2. Test conditions.

This test relates to the Mounted slide gate inserted in the scanner.
The Mounted slide gate must be inserted in the scanner to carry out this test.
No film is necessary for this test.
The acceptance of the test is automatic.
The amount of play is saved in the file im1500data.ini, in chapter FILM_CARRIER_MSLIDE, line TRANSMISSION_PLAY.

3. Pre-requirements.

• Drive gear of film carrier (of bottom) correctly tight. There should not be any play with that of the top.
• Motor Intensity test is accepted to ensure that the tension of the primary belt is correct .
• Slide Motor Intensity test is accepted to ensure that the tension of the belt film carrier is correct .

4. Test realisation.

Click on "RUN" to execute the test. The scanner will take 25 consecutives measurements of the play and will display the found value for each measurement. For each measurement, the motor will turn in one direction, briefly stops start again in the opposite direction.
An graph is updated at each measurement: Do not take it into account.
At the end of 25 measurements, the final amount of play corresponds to the largest value found. This value is saved. The updated graphics corresponds to the values of the play of 25 measurements carried out.
Note : the value of play of the 25 measurements is not necessary stable, it can vary with each measurement.

5. Test acceptance.

The test is accepted if the paly value is lower to 80. If not The test is rejected.

6. Other affected tests.

• Test Slide Cal Encoder 2.
• Test Slide Cal RGB IR.
• And to a lesser extent all tests where an image is scanned.

7. Trouble shooting.

If the test fails (amount of play higher than 80) : This means that there is too much play in the gears. Start by checking that the Film carrier driving gear (of bottom) does not interact with that of the top. Check the primary tension belt. Check the tension belt of the film carrier. Check the gears of the film carrier.