JAA80251-R.3723.A
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A 48・AF-S 24-70/2.8G
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Check the lens operations by using a PC after assembling.
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Check on PC
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Inspection item:
1. GMR encoder operations
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Perform the scanning-drive of lens and check the total number of pulses.
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In case the GMR encoder is defective, the number of pulses becomes out of standard.
2. Lens driving stop accuracy
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Check the number of overrun/underrun pulses (deviation of the stop position from the target position) per
the specified lens driving amount
specified lens driving amount
specified lens driving amount
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3. Lens driving time
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Check the drive time (from starting and stopping the drive) by using the oscilloscope when the specified
lens is driven.
4. Switches and lens condition
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Check the positions of the focus encoder, zoom encoder, and focus mode.
Inspection of Lens operations
INC