Planmeca Compact I, Техническое руководство

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Chapter C - SERVICE MODE
Planmeca Compact i C-33
SERVICE MODE DETAILED DESCRIPTION
Technical Manual
2.8 Patient chair related service modes
n 75 Show emergency stop switch signal (n signal)
This service mode is used to check the proper operation of the emergency stop switch under
the chair bottom. The display should normally show 0 (zero) if nothing is touching the plate
(switch closed) and the cable and connectors are OK. Pushing the plate upwards must
change the display to 1 (one) (switch opens). A continuous open circuit in the cables (or a
short from either of the emergency stop switch signal cables to the chassis) would also cause
the display to show 1 (one).
n.76 Show lift mechanism position sensor signal (nnn signal)
This service mode shows the signal from the multi-turn potentiometer that is used as a posi-
tion sensor for the lift mechanism. This potentiometer is mounted directly to the motor, very
close to where the worm-screw axle exits the gearbox. The display range is 0 to 255. Driving
the mechanism up increments the number, driving the mechanism down decrements the
number. The displayed number should be stable within ± 1 digit when not driving the chair.
The control system refuses to drive the motor (in the respective direction) if the signal is under
25 or above 240.
n.77 Show backrest mechanism position sensor signal (nnn
signal)
This service mode shows the signal from the multi-turn potentiometer that is used as a posi-
tion sensor for the backrest mechanism. This potentiometer is mounted directly to the motor,
very close to where the worm-screw axle exits the gearbox. The display range is 0 to 255.
Driving the backrest up increments the number, driving the backrest down decrements the
number. The displayed number should be stable within ± 1 digit when not driving the chair.
The control system refuses to drive the motor (in the respective direction) if the signal is under
1 or above 240.
n.78 Select S position function mode (n mode = 0, 1)
This service mode is used to select the S position function mode.
0 = Previous working position is stored in memory when the chair is driven from the spit
position to an automatic position (A, B, C or D) and the S key indicator light remains on. When
the S key is pressed again, the chair will move back to the position in which it was when you
first pressed the S key. (Default)
1 = Previous working position is cleared from the memory when the chair is driven from the
spit position to an automatic position (A, B, C or D) and the S key indicator light goes off.
When the S key is pressed again, the chair will move again to the spit position. Select this
option when using the S position as an exit position.
Note that changing the chair’s position in non-automatic mode will not clear the previous
working position from the unit’s memory.
n.79 Lift mechanism position sensor calibration mode (L --)
This service mode is used to calibrate the lift mechanism potentiometer. This needs to be per-
formed if the pot is loosened from the motor or if the motor is replaced. Press the S key for 8
seconds until the LED in the key lights. Use the A and B keys to first align the mechanism.
Loosen the potentiometer cogwheel and turn the pot axle until the segments align in the dis-
play. Tighten the cogwheel. For more detailed calibration instructions, please refer to 2.2
“Calibrating lift motor position sensor” on page F-20.
Note that during the calibration of the lift motor position sensor all software limits are ignored.
Special care must be taken for not to damage the unit by driving the lifting adapter to its
mechanical limits.