Technogym JOG EXCITE - BELT MOTOR; ELEVATION MOTOR; AT DRIVER

JOG EXCITE: Service & Maintenance Manual - rev. 1.1
Page 3.3
3.1.4. EMERGENCY SWITCH
This is the user safety device. It consists of 2 microswitches connected in series, which can be
tripped either by pressing the emergency button or by pulling a cord clipped to the garment of the
person exercising.
The emergency switch, which provides a NC contact, acts on both the display board and the AT
driver. When the emergency is tripped the AT driver disables the operation of the tread belt and
elevation motors. The display board also detects tripping of the emergency switch, upon which it
interrupts the exercise and shows the “PRESS ANY KEY…” message on the display.
To resume normal machine operation, it is necessary to press any key on the display.
3.1.5. BELT MOTOR
An asynchronous three-phase motor which, by means of a pulley and poly-v belt, turns the driving
roller of the tread belt. Each motor phase is equipped with a normally-closed thermal cutout which
opens when the temperature exceeds a preset threshold, in order to safeguard the integrity of the
motor. The 3 thermal cutouts are connected in series and reach the AT driver as a NC external input
signal. When this contact opens, the AT driver generates an alarm.
It is equipped with a high inertia flywheel, to permit more gradual deceleration of the tread belt in
the event of a power outage or emergency stop.
ATTENTION: dangerous voltages are present at the motor, the flywheel and the metal
plate on which the motor is fixed.
3.1.6. ELEVATION MOTOR
This is a linear actuator equipped with 24 Vdc motor, integral reduction gear and a rod that is
pushed backward and forward by the motor. This rod acts upon a frame connected to the front
wheels of the machine: when the rod moves so does the frame, thereby lowering raising the
machine.
The actuator has a built-in Hall effect sensor which acts as an encoder, generating pulses when the
motor moves. This furnishes a feedback signal on the motor movements, which is used for tracking
the position of the rod and hence the elevation of the machine.
3.1.7. LIMIT SWITCH
This is a NC microswitch which defines the zero-reference position for the elevation mechanism:
the switch is positioned so that it is pressed by the machine during the reset procedure, thereby
defining the reference position.
3.1.8. AT DRIVER
This is the electronic device that acts as an interconnection hub for the main components of the
lower assembly, and serves as the point of connection with the display. In fact:
• Controls the motors:
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it exchanges, over the RS-485 serial link to the display board, the commands for controlling
the tread belt and elevation motors;