20
Function:
Once the clamping operation has been initiated, the solenoid brake is switched on and the motion of the
brake disk is monitored via incremental encoder B9. The brake locks the main shaft. The motor M1 is switched on in
the direction of rotation as during the measurement run. The multi-vee belt conveys the motor torque to the big pulley
and clamping nut. As the tie rod cannot rotate inside the main shaft, the rotary motion of the clamping nut is converted
into longitudinal motion of the tie rod and later pulled to the left (max. travel is 76-mm). Via the yoke with the two
clamping jaws and the clamping sleeve, the motion is transferred to the clamping head pulling the wheel on the cone
and against the adaptor fl ange. With the wheel pressed to the adaptor fl ange, longitudinal movement and the motor
come to a stop. The stop of the motion is detected via encoder B9. The drive and shortly afterwards the brake are
switched off.
The pitch-to-diameter ratio of the clamping nut thread has been selected that self-locking occurs in the clamped state;
i.e. the clamped state is retained.
To carry out a measurement run, the motor M1 is switched on but with the main shaft is free to rotate. As the tie rod
cannot be pulled any further to the left, the motor torque is transferred to the main shaft via the clamping nut, thus
accelerating the wheel for the measurement run.
After measurement, the motor is switched off and the solenoid brake decelerates the main shaft.
To release clamping, the solenoid brake locks the main shaft again; the motor is switched on in the reverse direction of
rotation. The tie rod moves back to the right-hand starting position, causing the clamping jaws to retract in the adaptor
sleeve thus releasing the clamping sleeve. As with clamping, motion is monitored by the encoder. Motor and brake are
switched off in succession.
Releasing a wheel from the power-clamping device in the event of a power failure Behind a 15-mm hole in the front
of the cabinet closed by a black plastic cap, two pegs project axially out of the big pulley. Take off the cap an insert a
rod or screwdriver of 7 to 14-mm width for a length of 130-mm. With the rod engaging in the pegs, rotation of the big
pulley is hindered.
By turning the wheel in the direction of rotation of a measurement run (the top of the wheel to the rear) while inhibiting
rotation of the pulley, clamping force will slacken. By further turning at the adaptor fl ange, the tie rod is moved to the
right-hand limit position so that the clamping sleeve and the wheel can be removed. Finally, put back the black cap.
3.19 2D SAPE (S
EMI
-A
UTOMATIC
-P
ARAMETER
-E
NTRY
)
SAPE stands for
S
emi
A
utomatic
P
arameter
E
ntry and this balancers is equipped by
2D SAPE ARM.
The function of this module is to:
- measure the offset of the rim reference point.
- measure the diameter of the rim at the rim reference point (2D-extension)
- apply the stick-on weights in position.
Every time the machine powers on, the software automatically checks the SAPE system in its initialization
procedure. The SAPE’s must be in the HOME position during start up. If the SAPE is good the machine
enters idle state as normal. If for example, the distance, diameter or width gauge fails, the machine displays an error
message.
The potentiometers plug into the main processor at connection X6 (Distance) and X7 (Diameter). The potentiometers
are supplied with 3.3VDC from the Processor Board. As the SAPE is pulled out and up towards the wheel the
SM HOF GEODYNA 7600 Rel.D
