Planmeca Proline CC, Technical Manual

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Chapter I - FUNCTIONAL DESCRIPTION
Planmeca Proline CC panoramic x-ray I-11
Technical Manual
When the motor is driven to the limit sensor and stopped, it will not start to that direction but only
to the other. When started to the other direction it will run slowly as long as it gets back to the
sensor and over it. To avoid hazards the system will speed up the motor if it doesn’t reach the
sensor within 5 seconds when the button is kept pressed, that normally is long enough, and
ignore the sensor pulse. Therefore it should be noted that if for some reason the up/down move-
ment is driven over the limit sensor and cannot be driven back within this time (jammed) the but-
ton should not be operated more than 4 seconds at a time while helping the motor by hand. If this
is not taken care of, the system detects the sensor as if it was the sensor of the other end and
never comes to the normal operating range.
In this case enter the slow speed adjustment mode to the direction you want to go and press the
button. This mode ignores the sensor and enables you to reach the normal range between sen-
sors. While in the normal range exit the adjust mode and then drive the motor to the other end
sensor to get it operative again.
Layer adjust motor
This motor is located at the layer adjust mechanism in the lower fixed part. It’s function is to move
the bite block, temple rests and handles (and the patient) horizontally in order to get the patient’s
teeth in the right position relative to the layer positioning light. It is a stepper motor and it gets it’s
drive from the keyboard processor.
When this motor is activated, it will first drive one second at a slower speed and then accelerate
to the full speed.
When it reaches one end of it’s movement range it will slow down and stop in the end. When the
operating button is released the motor stops immediately.When the motor is moving, it’s coordi-
nates are updated in the mm-display. They are calculated from the motor steps and show the
position relative to the sharp layer (00) that is programmed during the alignment procedure. The
position of the sharp layer relative to the motor movement range varies and is not the same for all
equipment. For this reason the movement is not always from -30 to 09 but can be somewhat dif-
ferent. Still the full range is always 39 mm.
The motor has one reference sensor on the LAYER/HOLD LIMITS circuit board. Every time
when the sensor is passed to the positive direction the position information is checked and cor-
rected if necessary. If the layer adjust mechanism or the keyboard processor is replaced it may
happen that the motor is not driving in correct range and cannot be driven past the sensor to find
the reference point.
To solve this the system in the service mode does not stop the motor at the point it considers to
be the mechanical end but continues at slow speed to enable you to drive it past the sensor in
positive direction (to be sure pass it first in negative direction). Care must be taken not to drive
the motor to the mechanical stop that may damage the gears.
Temple rest motor
The temple rest motor is located beside the layer adjust motor. It’s function is to keep the patient
centered in the right position during the exposure and release the patient after the exposure. It is
a stepper motor and it gets it’s drive from the keyboard processor.
When the motor is activated the system checks with a sensor on the LAYER/HOLD LIMITS
board whether the temple rests are open or closed. If the sensor is active (near the magnet) it is
detected as a closed position and the motor is driven into open direction a certain length. If the
sensor was passive the motor is driven into closed direction as long as it finds the sensor. Note
that opening is performed at full speed but closing is done more gently not to startle the patient.
Rotation motor
This motor is located in the rotating part beside the generator processor board. It is rotating the
rotating part during the exposure and return. The drive to this stepper motor is delivered by the
generator processor.
÷This motor cannot be operated independently but is activated by the system whenever the rota-
tion is needed. The operating range of the rotation is controlled by two sensors fixed to the rotat-
ing part frame.