The tool is equipped with an extra spring to reach the lower torque values. To
change the spring remove #2 nut, replace the spring and then adjust the torque
value as mentioned above.
To check the torque value we suggest the use of K5 electronic torque tester.
4. Control unit and power supply
EDU 1FR power supply and control units act as voltage transformer and electronic
torque controller.
The power supply, 90/260VAC-50/60Hz, is converted into 18-30V DC required by
FAB and RAF series screwdrivers through an electronic transformer with constant
power of 120W. The electronic control circuit cuts the power supply to the motor
in response to the clutch action as soon as the pre-set torque has been reached.
On the front panel of the controller, there are two knobs indicated with the letters
“R” and “A”.
Knob “R” is used to adjust the slow start option (ramp) from 0 to 2 seconds, i.e. the
motor will reach the nominal speed gradually. Dial “1” for no ramp and “10” for
maximum ramp.
Knob “A” is used to adjust the motor speed for nominal speed, i.e. speed as per ctg.
data sheet, to 60% of nominal speed. Dial “1” for minimum speed and “10” for
nominal speed.
On the front panel you can also see 2 lights: the green one will light permanently
when the power is on, the red one will light only when the clutch “fires” indicating
the preset torque has been reached.
The temperature of the unit can normally reach 45°C.
EDU1FR/SG can be used with any Kolver screwdriver with clutch, either lever or
push start, inline or pistol type.
This model rear panel presents one connector for input and output signals. Input:
start, reverse, stop motor and torque HL. Output: torque and pressed lever signals
(24V 20mA) and error signal. See the enclosure.
On the back panel you can find a socket equipped with a fuse holder and on/off
switch. To replace the fuse just pull out the fuse holder and change the fuse.
Always remember to switch off the control unit at the end of each working shift.
5. Maintenance
The screwdriver’s motor is equipped with carbon brushes 9mm long. When their
lenght is about 5mm it is time to replace them as per the following instructions:
a.
Remove the #59 and #68 screws and the #54 and #58 housings.
b.
Remove #53 brushes from their seat by delicately lifting up the #52
spring and desolder their wire.
c.
Solder the wire of the new brushes, insert them into their seat and stop
them with the relevant #52 springs.
d.
Re-mount the housing.
NOTE
The sound level generated by Kolver electric screwdrivers is always lower than
70dB(A).
The vibrations transmitted to operator’s hand are lower than 2.5m/s². In particular
the exposition to vibrations is lower than 1m/s² for operators who make up to 4200
screwing cycles per day.
IMPORTANT
: For each second of operation the motor needs 3 seconds of rest, as
indicated on the tool label (1s/3s). Failure to do so may result in motor overheating
and eventually damage and will be considered as a misuse. Our warranty will not
apply.
WARRANTY
KOLVER warrants its products for a period of one year from the date of original
purchase. Any products which examination proves to be defective in workmanship
on material will be repaired or replaced free of charge during the warranty period.
For repair or replacement return the product, trasportation prepaid, to your nearest
KOLVER service center. This warranty does not repair or replacement required as
a consequence of misure, abuse, normal wear and tear.
