Technogym BIOSTRENGTH LINE, Service Maintenance Manual

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BIOSTRENGTH LINE: Service & Maintenance manual - rev. 2.1
Page 3.8
3.2. SOLENOID MANAGEMENT
3.2.1. M
ECHANICS
The additional weight is selected by using a mechanism such as the one schematically illustrated in
the figure below.
Figure 3.2.1
Figure 3.2.2
The solenoid a is located on the first plate in the weight stack. Inside, it contains a pin b that moves
freely in and out, and which is:
•
pushed outside the solenoid by the spring c to select the additional weight d when the solenoid
is de-energized (Figure 3.2.1);
•
drawn into the solenoid by the magnetic field produced, to deselect the additional weight d ,
when the solenoid is energized (Figure 3.2.2).
3.2.2. C
ONTROLS
To change the selection of the additional weight, the CPU board sends the enable signal to the Bio
servo board. This powers the solenoid properly, which in turn generates an internal field that draws
the pin inside, to avoid selecting the additional weight.