AGFA d-lab.3 Digital Compact Lab

Repair
Scanner
Filter Wheel LH_MO01
The filter wheel stepper motor is connected to the
filter wheel by a toothed belt. The filter wheel can
hold eight filters (in cw order):
1. free
2. RED-Negative
3. RED-Slide
4. GREEN-Negative
5. GREEN-Slide
6. BLUE-Negative
7. BLUE-Slide
8. Light dimmer
The zero position is reached with light sensor
LH_LS01.
The motor is energised by different currents via
LH_MO01_I0 and LH_MO01_I1:
A
B
Arrow
dlabr153
Zero position (position for the 1 st exposure)
Initialisation position (Position LH_LS01)
Direction of rotation
I0 0 1 0 1
I1 0 0 1 1
Current 100% 72% 38% 0%
The motor runs in half step mode:
− Step angle 1,8°
− Transmission of 3:1.
The filter wheel is turned through 0.3° per step.
150 steps must be performed between the filters.
− Direction of rotation of the filter with a cw turning
motor: RED-Negative, RED-Slide, GREEN-
Negative, etc.
− Zero position of the light sensor with a cw turning
motor: 6° before the RED-Negative filter
− Clock: Indicated by LH_MO01_CLK
− Direction: Can be selected by LH_MO01_DIR
− When the lamphouse opens, the stepper motor is
switched off.
AGFA d-lab.3 2001-01-02 /PN 9009 4.3.7