SUHNER ABRASIVE UMB 4-RQ Documentación Técnica página 23

The specified vibration value was measured with a
standardised test procedure. It can be used to
compare products or to make an initial assess-
ment of the exposure. The vibration emissions may differ
from the specified value, depending on how the power
tool is used. Operating personnel must be protected with
defined safety measures based on the estimated expo-
sure under the actual conditions of use (these must take
into account all phases of the operating cycle, e.g. the
times when the power tool is switched OFF and the times
it is switched ON, but is not under load).
2.4 o
perAting conditions
Temperature range during operation: 0 to +50°C
Relative air humidity: 95 % at +10°C not condensed
3.
haNDLINg
3.1 p
rotectiVe deVises
3.1.1 p
rotection of the mAchine
s
tArting current limitAtion
The electronically controlled soft starting provides for
smooth starting of the machine. Due to the low machine
starting current a 16 A fuse is adequate.
t -
emperAture dependent oVerloAd protection
For protection against overheating, when a critical tem-
perature is reached the electronic safety feature switches
into the cool-down mode.
Then the machine continues to run at approx. 1,300 rpm
and the electronic constant speed control is deactivated.
After a cool-down time of approx. 10 - 20 sec. the ma-
chine is again ready for operation.
Turn the machine off and back on again to activate the
electronic constant speed control.
When the machine is at operating temperature the tem-
perature-dependent overload protection reacts at a cor-
respondingly earlier time.
o /
VerVoltAge restArting protection
On short-time outage of the power voltage (pulled power
connector, unstable power voltage etc.) the machine will
stop. On recovery of the power voltage the machine has
to be turned off and back on again. The machine is then
ready for operation.
3.2 g
rinding tools
Use only grinding tools whose admissible maxi-
mum speed is equal to or higher than the no-load
speed of the machine.
3.2.1 c
Slide the tool into the provided tool holder until the stud
engages. Now check that the tool sits securely. After se-
curing the tool check that all external moving parts do
/ o
PERaTIoN
not collide with any stationary parts. Repeat this check at
regular intervals, replacing the tool when necessary.
3.3 w
To achieve an optimum result, move tool uniformly back
and forth with light pressure. The electronic constant con-
trol maintains the speed nearly constant during idling and
work under load and assures a uniform result. Excessive
pressure lessens the working capability of the machine,
as well as the life of the tool. The machine is equipped
with an electronic control and integrated overload pro-
tection. If the machine is overloaded, the speed will drop
drastically. Immediately take the load off the machine and
allow to run for a short time without load.
4.1 p
After approx. 150 operating hours check carbon brushes
and replace if necessary. Clean motor housing and re-
plenish grease filling in gearbox housing.
To maintain the protective insulation the machine must be
subjected to a technical safety inspection. This work must
be done exclusively by a specialized electrical workshop.
When working on metal under extreme working conditions
conductive dust deposits can occur inside the machine,
thereby impairing the protective insulation of the tool. In
such cases the use of a stationary vacuuming system,
frequent blowing out of the ventilation slots and protection
by a fault current protection switch are advised.
Use only clean tools!
/
hAnging fitting the grinding tool
orKing instructions
4. S / m
ERvICE
reVentiVe mAintenAnce
To work effectively and surely keep the
machine and the ventilation slots clean at
all times.
aINTENaNCE
23