JAA63051-R.3689.A
- A35 ･ AF-S VR MC 105/2.8G -
Inspection of Lens operations
Check the lens operations by using a personal computer after assembling.
○ Check by personal computer
● Check by the following considerations:
1. MR encoder operations
・
Drive the scanning of lens and check the total number of pulses.
・
In case the MR head of the MR encoder and the magnetic tape are misaligned, the number of pulses
becomes out of standard.
2. Lens-servo stop accuracy
・
Check the number of overrun/underrun pulses (deviation of the stop position from the target position) per
the specified lens driving.
・
In case the irregularity of mechanical operations does not take place in the focus ring driving unit, the
underrun tends to occur if it is heavy in the cam ring rotation of the MR encoder, while the overrun tends
to occur if it is light in its rotation of the MR encoder.
3. Lens-servo time
・
Check the servo time (from starting and stopping the servo) when driving the specified lens by using the
oscilloscope.
・
In case the irregularity of mechanical operations does not take place in the focus ring driving unit, the
servo-time tends to be long if it is heavy in the cam ring rotation of the MR encoder, while the servo-time
tends to be short if it is light in its rotation of the MR encoder.
4. Switches and lenses
・
Check the ON/OFF operations of switches and the operating condition of the distance encoder.
● After inspections
1. When the MR encoder operations are not up to the standard:
Readjust the MR duty. (ref. Page A33.)
In case the pulse is not up to the standard, adjust the output waveform of the MR encoder again.
(ref. Page A9.)
In case the pulse meets the standard, replace the cam ring unit fixed-tube unit or the mechanical
parts that make the focus ring drive.
2. When the lens-servo stop accuracy is not up to the standard:
Check the output waveform of the MR encoder. If it is normal, replace the fix-tube unit or the
mechanical parts that make the focus ring drive.
3. When the lens-servo time is not up to the standard:
Readjust the driving frequency and motor control.
In case the lens-servo time is not up to the standard even after the readjustment, replace the fix-tube
unit or the mechanical parts that make the focus ring drive.
4. When switches do not work properly:
Check the wiring state of the troubled switch or replace it.
May. 26. 2006
Changed page
× 4
（Addition）
（Addition）
（Addition）
（Misdescription）
Summary of Contents for AF-S VR Micro Nikkor 105mm/f2.8G
Page 13: ...JAA63051 R 3689 A D11 AF S VR MC 105 2 8G Focus index unit 83 3 GMR unit Focus index unit ...
Page 100: ...JAA63051 R 3689 A A76 AF S VR MC 105 2 8G Target chart Resolution chart ...
Page 107: ...JAA63051 R 3689 A F1 AF S VR MC 105 2 8G 外観図 Sketch drawings ...
Page 108: ...JAA63051 R 3689 A F2 AF S VR MC 105 2 8G 組立図 Structure of the Lens ...
Page 109: ...JAA63051 R 3689 A F3 AF S VR MC 105 2 8G ...
Page 110: ...JAA63051 R 3689 A F4 AF S VR MC 105 2 8G ...
Page 111: ...JAA63051 R 3689 A F5 AF S VR MC 105 2 8G ...
Page 112: ...JAA63051 R 3689 A F6 AF S VR MC 105 2 8G ...
Page 113: ...JAA63051 R 3689 A F7 AF S VR MC 105 2 8G ...
