Kolver RAF38NS Operator's Handbook page 3

1. Applications
KOLVER electric screwdrivers are used to tighten to the required torque screws,
nuts, studs and any other kind of threaded connection on any material. Table 1 will
help you to identify the capacity and the torque range of each model. Obviously, it
is possible to use the screwdrivers with screw having a larger diameter if the torque
fall within the indicated range. All models are reversible and can consequently be
used to unscrew. Electric screwdrivers are mainly used in the electronic industry as
well as for electric appliances, wiring, toys, lamps, glasses, in the mechanical light
industry etc.
Model Capacity
FAB 10 RE M2,5
FAB 12 RE M3
FAB 18 RE M4
RAF 32 NS M5
RAF 38 NS M5
1
Table
2. Use
The screwing system is composed by a screwdriver, a cable with 5 pin connectors
and by a control unit and power supply. To install it please follow the instructions.
a) Connect the 5-pin plug of the cable to the controller socket and to the
screwdriver and tighten the relevant nuts.
b) Push the collect ring of the quick charge chuck towards the body of the
screwdriver, insert the desired bit into the exagonal seat ¼'' and release the ring.
c) Connect the controller plug to a mains supply socket 230V-50Hz.
d) Switch on the controller through the green light button "POWER".
e) Position the bit head firmly into the fastener head, press the starting trigger and
run the faster down. The tool stops automatically when the preset torque is reached
and it is ready for the following operation.
3. Adjusting the torque
The torque value of the screwdriver is adjusted by changing the tension of the
clutch spring, screwing or unscrewing the threaded #2 nut. After each adjustament
lock the nut by means of #30 ring.
To increase the torque turn the nut clockwise, to decrease it turn the nut
anticlockwise.
Speed RPM Torque range Nm
1000 0,05 – 0,8
1000 0,2 – 1,4
650 0,3 – 1,8
1000 0,7 – 3,2
650 0,9 – 4,1
The tool is equipped with an extra spring to reach the higher torque values
indicated in TABLE 1. 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 TL50i electronic torque tester.
WARNING: in cause the screwdriver does not stop automatically you should
reduce the torque setting by turning the #2 nut anticlockwise.
4. Control unit and power supply
EDU power supply and control units act as voltage transformer and electronic
torque controller.
The power supply 230V-50Hz AC is converted into 30V DC required by FAB and
RAF series screwdrivers through a transformer certified EN61558-1/p2-6.
The electronic control circuit cuts the power supply to the motor in response to the
clutch action as soon as the preset torque has been reached.
The table below summarizes all the possible combinations and different options.
Type of control unit
EDU1NS 67VA, 1 plug, 1 speed
67 VA, 1 plug, speed
EDU1NS/RA regulation, soft start
regulation
100VA, 2 plugs, 2
EDU2CL
speeds
Table 2
Units EDU2CL is equipped with a two positions speed selector switch. When the
switch is in the "A" position the screwdriver will operate at the speed indicated in
table 1, when the switch is in "B" position the screwdriver will rotate at 70% of
the speed indicated in table 1.
Features Applications
Metric screws or self
tapping screws on plastic
Metric screws or self
tapping screws on plastic
Metric screws or self
tapping screws for 2
screwdrivers