SUHNER UWC 7R Dossier Technique page 5

Temperatur-dependent overload protection
For protection against overheating, when a critical
temperature is reaches the electronic safety func-
tion switches to the cool-down mode.
The machine then continues to run at approx.
2' 4 00 rpm / UWC 7-R
1'700 rpm / UTC 7-R
and the elctronic constant-speed control is deac-
tivated. After a cool-down time of approx. 10-20 s
the machine is again ready for operation. Turn the
machine OFF and back ON again to activate the
electronic constant-speed control. With the machi-
ne at operating temperature the temperature-de-
pendent overload protection reacts correspondi-
ngly earlier.
Undervoltage / restarting protection
On short time power failure (pulled power plug,
instable power supply etc.) the machine will stop.
When the power voltage is restored, the machine
has to be turned OFF and then back ON again.
Once this has been done the machine is again
ready for operation.
Attention: Even if the cut-out is not activated, dan-
ger of overloading always exists, thus operate the
tool in a sensible mode, in order not to increase
unnecessarily excessive current draw, which over-
heads the motor.
Speed selection
Select required speed with variable speed selector
17 for correct surface feet./M.O.S.
Speed selector UWC 7-R / UTC 7-R
Position rpm
1 3 000
2 3 800
3 4 600
4 5 300
5 6 100
6 7 000
Attention: Do not change pre-selected speed while
tool is running and has working tools mounted.
Cut-off wheels
When cutting, don't tilt grinder, otherwise it jams.
Grinding wheels
Best grinding results are achieved if grinder is at a
30 degree angle to the work piece.
• Never use a cut-off wheel for grinding.
• Do not treat any material containing asbestos.
• Disconnect tools when changing accessories,
such as wheels and discs.
• Lock spindle 2 with lock button 8.
Attention: only use lock button, when machine
is at a complete stop.
• Remove or mount flange nut 6 +/or 15.
Clean mounting set before installation.
• Check concentricity, use only vibration free
tools and always observe M.O.S. (Max.Opera-
ting.Speed).
Maintenance
• Store tool in a clean, dry place.
• Disconnect tool when not in use and before
servicing.
• The ventilator openings for cool air must be
kept free and clean, use air gun to blow out
dirt.
• Replace grease in grinder head every other
time, when carbon brushes are replaced. Use
the authorized service center nearest
you.
• Damaged plugs and cords must be replaced
immediately.
• Repairs must only be done by a qualified/
licensed electrician, otherwise it could be ha-
zardous to the operator.
• Warranty claims can only be considered, if
tool is returned complete.
Accessories
All accessories can be found in the
sive Power Tool catalog.
Subject to change!
Abra-
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