5
The knob "
SPEED
" is used to adjust the speed of startup
from 40 % to 100% of rated speed. In the case of
ECL
from
75 % to 100 %, see catalog. The adjustment is done clok-
kwise from minimum to maximum setting.
The torque depends on the model tool used control unit
automatically recognizes the tool connected:
- Torque setting ECL Model:
Knob "
TORQUE
" is used to select the value of the torque.
Two ranges of torque are selectable through the
TORQUE
RANGE
switch.
"
L
": The torque range is approx. from 0 to 30 % range in the
catalog.
"
H
": The torque range is approx. from 20 % to 100 % range
in the catalog.
OFFSET CALIBRATION SCREWDRIVER:
When the screwdriver is used for the first time, we suggest
to calibrate the offset in the control unit so that the full
range of torque may be achieved.
Please follow the instructions:
a) Switch the control unit OFF.
b) Connect the screwdriver in order to run clockwise
c) Push start and keep on pushing
d) Switch the control unit ON.
After 5 secs, the motors will start running at different
speeds until the end of the offset cycle.
Repeat this procedure either in
L
and
H
range.
Do this once; it will not be necessary to repeat it anymore,
unless you change the screwdriver.
- Torque setting Clutch Model:
The "
TORQUE
" knob and the
H/L
torque switch no longer
have any function and the operator can set on the control
unit only
RAMP
and
SPEED
.
The torque is adjusted by varying the compression the
clutch spring, tightening or untightening the threaded collar
after loosening the lock nut.
To increase the torque, turn the threaded collar clockwise.
To decrease the torque, turn counterclockwise. On the
clutch ring there is a scale label to help to set the torque.
The value must be considered merely indicative (the clutch
may also work 2 - 3 mm below the minimum level, but it is
important that the clutch shots correctly.)
English
2. Description
WELLER electric screwdrivers are used to tighten to the
required torque screws, nuts, studs and any other kind of
threaded connection on any material. Obviously, it is possi-
ble to use the screwdrivers with screw having a larger dia-
meter if the torque falls within the indicated range. All
models are reversible and can consequently be used to
unscrew. Electric screwdrivers are mainly used in the elec-
tronic industry as well as for electric appliances, wiring, toys,
lamps, glasses, in the mechanical light industry etc.
3. Instructions
WELLER screwdriving system is composed by a screwdriver,
a cable with 2 x M12 female 8 pin connectors and a power
supply and control unit.
To install it please follow the instructions.
a) Connect the 8-pin connectors of the cable to the
controller WTS and to the screwdriver and tighten the
relevant nuts.
b) Connect the controller plug to a main supply socket
90/260V- 50/60Hz.
c) Switch the controller on through the black button on the
back panel.
d) Select the desired speed (
SPEED
) and ramp (
RAMP
)
through the corresponding knobs or display (depending
on model). Adjust the torque (see section 3).
Make sure that the selected values are compatible with
the torque value set so that the clutch can shoot
properly.
e) Do not slide the forward/reverse while the motor is
running, it’s dangerous for the motor!
For a long life of motor not pass over 60° C when it works.
4. Control unit and power supply /
Adjusting torque
The power supply and control unit WTS acts as voltage
transformer and electronic torque controller.
The power supply (90/260 V AC-50/60 Hz) is converted into
40 V DC required by the WBTS screwdrivers series through
an electronic transformer with a constant power of 120 W.
The electronic control circuit cuts the power supply when the
current reaches the setting level.
WTS A (Analog settings):
On the front panel of the controller there are three knobs.
The knob “
RAMP
” is used to adjust the slow start option
(
RAMP
) from 0 to 2 seconds, i.e. the motor will reach the
nominal speed gradually.
The adjustment is done clockwise from minimum to maxi-
mum setting.
