Speed Sensor; Brake Control; Mechanics; Control - Technogym Recline Forma Service Maintenance Manual

RECLINE EXCITE: Service & Maintenance Manual - rev. 1.1

3.2. BRAKE CONTROL

3.2.1. M
ECHANICS
The movement of the pedals puts the brake into rotation by means of a belt. The speed sensor,
connected to the machine frame, the speed sensor detects the heads of the brake disk fixing bolts
and provides a signal representing the RPM.
3.2.2. C
ONTROL
The control block diagram is as follows:
Pulses
The resistance which the user perceives on the pedals is a combination of 2 factors:
• mechanical: mechanical efficiency of the linkages and more generally the mechanical friction
of the system as a whole. The mechanical friction has been measured in the laboratory and is
determined by a specific SW function of the upper kit.
• electrical: resistance produced by the brake;
To obtain a given exercise effort level, the digital plan board sends the required value of "electrical"
resistance to the brake board via the RS-485 serial link. Based on the commands received and the
feedback signal from the speed sensor, the brake board will then apply the appropriate excitation
current to the brake winding and generate an electromagnetic field.
The value of the current applied is based on the value of the brake table memorized into
the brake board.
Digital Plan Board
CN14
RS-485
CN4
Brake Board
3-4/CN2
1-2/CN2
Excitation Current
Speed
sensor
Brake
Page 3.5