Technogym BIOSTRENGTH LINE, Руководство по техническому обслуживанию

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BIOSTRENGTH LINE: Service & Maintenance manual - rev. 2.1
Page 3.16
The CPU board disables the motor up or motor down command that generated the alarm signal
as soon as it is received, to protect the motor from the consequences of use during a current
surge.
The control logic states that when the alarm signal is high (~ 5 V), the Bio servo board can
freely pilot the motor. As soon as this signal becomes low (~ 0 V), the CPU board sets the
previously sent motor up or motor down signal low, thus the Bio servo board resets the alarm
signal, which then returns high. All of this takes place in the space of a few msec.
The figure below shows the alarm signal:
Figure 3.3.6
•
Pulses
This is the signal generated by the Hall-effect sensor built into the motor to measure the rpm of
the motor (encoder). This is a square-wave signal with a duty cycle of 50% that provides the
machine with feedback on the motor position.
This signal enters the Bio servo board (pin 5-6 on connector CN1), and here it is filtered,
squared and sent (pin 9-1 on connector CN7) to the CPU board (pin 9-1 on connector K4).
The figure below shows the encoder signal output from the motor:
Figure 3.3.7
The figure below shows the encoder signal output from the Bio servo board: