Technogym BIOSTRENGTH LINE, Service Maintenance Manual

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BIOSTRENGTH LINE: Service & Maintenance manual - rev. 2.1
Page 3.13
Figure 3.3.3
To adjust the position of the pin b on each plate a , a motor c turns a gear d which in turn moves a
chain e . Selector switches f are connected to the chain to press against the plate pin. The first
selector is slanted to make it easier to press the pin spring, When the selectors f press the pins b
inward, the plates are released from the cross g , while if the pin's spring pushes it outward, the plate
hooks onto the cross g . The figure above shows the free plates shaded in gray, and selected plates in
white.
3.3.2. C
ONTROLS
To adjust the selected weight, the CPU board sends the motor up signal (to increase the weight) or
motor down signal (to decrease the weight) to the Bio servo board. This powers the motor properly,
which in turn moves. Due to the movement of the motor, the Hall sensor, integrated into the motor
as encoder, produces the pulses that the Bio servo board sends to the CPU board. The CPU board
counts the pulses received. As soon as the number of pulses corresponds to the desired position, it
disables the motor command signal.
If the current absorbed by the motor after the starting point is too high, and above a set threshold
value, the Bio servo board sends an alarm signal to the CPU board to disable the motor. The pre-set
value may be adjusted using trimmer PT1.
CAUTION: do not adjust this trimmer unless strictly necessary. In any case, always
check the cause of the increased current in play (increased friction, mechanical parts
interfering with movement, electrical problems on the motor) before adjusting the
trimmer.
CAUTION: every time the trimmer is adjusted to raise the level of current absorbed by
the motor, make sure it is not greater than 5A, the maximum value allowed by the
motor.