101
Service Manual – SC500
20 - Wheel System, Traction
Functional Description
Machine movement is provided by the gear motor unit (M3)
The gear motor unit (M3) also functions as the main support of the machine, and is composed of an electric
motor, the reduction unit with differential and the drive wheels
The operator regulates the transfer speed, the working speed and reverse via the paddles, which are
connected directly to the speed potentiometer (RV1) Reversing is performed by pressing the back paddle
The Main machine controller (EB1) checks that the paddles are not pressed when the machine is started; if
they are, an alarm is generated (see section “Main machine controller Alarm Codes” in the “Control System”
chapter) and the drive system is inhibited
Once the paddles are returned to the rest position, the alarm will stop automatically (without the need to
turn the machine on and off)
When the paddles are pressed, the Main machine controller (EB1) supplies a voltage to the motor
proportional to the position of the paddles themselves The acceleration ramps and maximum speed can be
set via the corresponding parameters (see section “Displaying and Modifying User Modifiable Parameters” in
the “Control System” chapter)
Regulation of the maximum speed can be set with the buttons (hare / tortoise) on the User interface
controller (EB3)
