Pioneer DRM-7000 Service Manual page 125

< Principles >
Encoder side
A
phase difference / 2
B
phase difference / 2
Encoder plate
6.2.5 Relative Adjustment of the UP-DN
Interrupter
• Purpose:
To adjust the stop position range of carriage base elevation to
0.45 mm.
• Method:
Adjust by turning the relative adjustment screw on the carriage
base.
• Contents:
Set the interrupter UP 0.45mm than the interrupter DN. Adjust
the phase difference (relative height) between UP and DN to
0.45 ± 0.05mm.
• Preparation:
Set the unit to Diag-robotics-individually in Manual elevating
operation mode.
• Adjustment point:
Relative adjustment screw
The LEDs for monitoring the interrupter outputs are located on
the flexible relay board (interrupter UP: green, interrupter DN:
red).
(1) Move the carriage base upward (to around [200] ) to permit
easy access to the relative adjustment screw.
(2) While observing the green LED, slowly move the carriage base
up by hand and stop it immediately when the green LED lights.
Important: Be sure to stop the carriage base in an upward
movement.
(3) Turn the relative adjustment screw clockwise and stop it when
the red LED lights. (If the LED is already lit when starting the
adjustment, once turn the screw counterclockwise to turn the
LED off.) e
(4) Verification: Once move the carriage base down until the red
LED goes off, then slowly move it up again to check that the
two LEDs simultaneously light. If they do not light
simultaneously, repeat the adjustment from step (2).
Carriage base side
Clockwise rotation moves
UP Interrupter to upwards.
Clockwise rotation moves
DN Interrupter to upwards.
UP
C
DN
Clockwise for upwards
Interrupter
and counterclockwise
Lower edge
for downwards.
for reference
Fig. 4 Adjustment model view
• The figure to the left shows the center of the stop position of the
carriage base. The purpose of the adjustment is to obtain this
status. The stop position requires A > 0 and B > 0.
This means that the stop position range must be ± phase
difference/2 and the stop-position range must be equal to the
phase difference. Thus, as shown in the figure to the left, set
DN (reference side) to phase difference/2 below and UP
(adjusting side) to phase difference/2 above with respect to the
lower edge of the encoder slit.
• Adjust A in the height adjustment. Once align the target lower
edge of the encoder slit with the position of DN (= the position
of the carriage base) [step (7)], then move it up by the amount
of A [step (8)].
DN
∗ The interrupters light when the light is blocked.
(5) While observing the red LED (interrupter), slowly move the
carriage base up or down by hand and stop it immediately when
the red LED lights. Be sure to stop the carriage base in an
upward movement.
(6) Form the state at the moment when the red LED lights, turn
the relative adjustment screw clockwise 360 degrees (350 to
370 degrees).
(7) Lock the screws when the adjustment is completed. g
< Principles >
Clockwise for upwards and
counterclockwise for downwards
UP
DN
∗ The interrupters light when the light is blocked.
Adjust C ( A + B ) in the UP-DN relative adjustments.
After aligning the DN interrupter with the lower edge of the encoder
slit (step 2), temporarity align the interrupter UP also with the lower
edge (step 3).
After confirming that the DN and UP interrupters are in place (step
4), align the interrupter DN with the lower, edge again (step 5) and
move the interrupter UP upwards by the amount of C (step 6).
Fig. 5 Adjustment model view
DRM-7000
A
DN
C
UP
DN
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