FORMA: Service & Maintenance manual - rev. 3.0
Page 3.11
3.4. FAN DRIVE
3.4.1. MECHANICS
The fan is independent of the treadmill motor and assembled on its axis, on the other side of the
flywheel. It is a larger sized fan than the one used on Forma 2, which resolves the overheating
problems of the preceding version, especially during operation at low speeds.
3.4.2. C
ONTROLS
The fan is directly controlled by the fan interface board. However, the enable signal for starting the
fan comes from the inverter: when the motor starts, the fan must also start.
To start the motor, the CPU board sends a Start signal to the inverter via the driver board, in order to
enable the inverter for driving the motor. On receiving this enable signal the inverter generates a
signal which enables the fan interface board to start the fan.
The fan interface board receives this input enable signal which, via a relay, supplies an input voltage
to fan, causing it to start moving.
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