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10
7
Putting into Operation
Check before putting into operation that the mains
voltage agrees with the voltage specified on the
nameplate of the machine.
Switching on and off
Push the On/Off switch 1 forwards to switch the
machine on. To lock, push the On/Off switch 1 for-
wards fully.
By pressing the projecting front edge of the On/Off
switch 1, it returns to its initial position. The machine
slowly comes to a standstill.
Gentle starting
The starting current limiter reduces the starting cur-
rent. The motor slowly runs up to no-load speed,
thereby protecting the user and the gearing and pro-
longing the life of the machine.
Constant electronics
Under load, the voltage on the motor is increased. Full
power is then available and the machine turns at the
maximum possible speed. When the load is reduced,
the voltage drops again and the sound level for the
user is reduced.
Automatic spindle locking facility
(Auto-Spindel-Lock, ASL)
The machine is fitted with an automatic spindle-lock-
ing facility. The tool carrier is automatically blocked
when the machine is at a standstill, thereby facilitating
the tool to be changed.
Information for avoiding
over-loading the machine
When stressing the machine under normal conditions
the housing becomes noticeably a little warmer. How-
ever, if the housing becomes hot, this means that the
motor has been over-strained, and can become dam-
aged. By running the machine at no-load, the motor
cools down very quickly again and work can be con-
tinued.
Adjusting the protective guard (Fig. A)
Before any work on the machine itself, pull the
mains plug!
The protective guard 4 can be adjusted as far as it will
go, depending on the application.
The closed side of the protective guard 4 must
always point to the operator.
Disassembling/assembling the protective
guard (Fig. B)
Before any work on the machine itself, pull the
mains plug!
For disassembling the protective guard 4, remove the
2 screws and take off the counterflange. Lift the pro-
tective guard and the disc. The protective guard is
assembled in the reverse sequence.
8
Inserting/Removing Tools
Before any work on the machine itself, pull the
mains plug!
Only cut and grind when the protective guard is
mounted!
It must be possible to move the grinding tools
slightly, but they should not sit too loosely on the
spindle. The clamping nut must only be tightened
to the extent that the grinding tool is held firmly.
Roughing and cutting discs (Fig. C)
The automatic spindle-locking facility (ASL) enables
the tool to be changed more easily.
Using the face spanner 8, to loosen the flange nut 7
and unscrew.
The bore on the roughing/cutting disc 5 must fit on the
clamping flange 6 without any tolerance. It is not per-
missible to use adapters or reducers.
The two application examples (Fig. E) show how thick
(5 – 10 mm) and thin (1 – 6 mm) grinding discs have to
be fastened to the tool carrier using the flange nut 7.
Mount thick grinding discs (5 – 10 mm) such that the
reduced side of the flange nut 7 points towards the
machine.
Mount thin grinding discs (1 – 6 mm) such that the
reduced side of the flange nut 7 points away from the
machine.
Tighten the flange nut 7 firmly using the face span-
ner 8.
When using a diamond cutting disc, make sure that
the arrow pointing in the direction of rotation on the
diamond cutting disc agrees with the direction of rota-
tion of the machine (the arrow for the direction of rota-
tion is on the head of the machine).
A new grinding tool and any grinding tool that is
re-mounted, must run on the machine intended for
use at no-load for 30 seconds. Operating person-
nel and any other persons must stand outside the
danger area during the test run.
WTS 900 E
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