Technogym BIOSTRENGTH LINE, Service Maintenance Manual

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BIOSTRENGTH LINE: Service & Maintenance manual - rev. 2.1
Page 3.25
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Surge current, after the starting point when the motor is turned on;
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short-circuit;
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blocked rotor.
In these circumstances, the LP driver board sends an alarm signal to the CPU board through Bio
servo board to disable the motor.
When the motor reaches the front or back limit, the corresponding microswitch opens and disables
movement by the motor in that direction. When the board receives a signal that the limit switch is
open, it generates the alarm signal to the CPU board to disable movement.
CAUTION: if a limit switch is defective, damaged, or disconnected, the board detects its
open signal and prevents the seat from moving in that direction.
The board also has a few LEDs, two of which (DL1 and DL2) have to do with the microswitches:
when either is lit, the corresponding microswitch contact is closed; when off, the contact is open.
During the reset procedure when the machine is switched on, the rear limit switch is used to
determine the home position of the seat: the motor moves forward and then back a few cm, until the
limit switch opens and the board sends an alarm signal. This position corresponds to the home
reference (zero) of the seat motor position, and all other positions will be gauged based on it.