HUMMEL
®
01.01.2019
English / Englisch
WORKING WITH THE HUMMEL
®
5.2 REGULATING THE SANDING DRUM PRESSURE
The lever can be used to set three different drum pressure stages.
These three stages - COARSE / MEDIUM / FINE - are designated
on the notch plate as -GROB / MITT. / FEIN- (fig. 33).
The pressure stage indications relate to the grit grade sequence.
The sanding pressure should be adjusted inline with the grit grade
sequence and reduced as the fineness of the grit grade increases.
This setting facility permits you to adjust the drum pressure to the
prevailing circumstances.
GROB (COARSE) = high sanding pressure for coarse grit grade
MITT. (MEDIUM) = middle sanding pressure for medium grit
grade
FEIN (FINE)
= low sanding pressure for fine grit grade
In order to avoid dish-outs when sanding soft wood floors, the
sanding pressure should be reduced and the sanding speed
increased.
5.3 CHANGING THE SANDING BELT
Depending on the type of sanding process you wish to perform,
different abrasive grit grades can be selected. In order to change
the abrasive, proceed as follows:
1
Lift the sanding drum off the floor by turning the lowering
lever at the handle upwards (fig. 34).
2
Switch off the machine and pull the power plug out of the
socket!
3
Release the cover lock (fig. 35, 1) and remove the side cover
on the right of the machine housing (fig. 35, 2).
4
To release the tension of the sanding belt, pull the operating
lever of the drive unit upwards (fig. 35, 3). This will lower the
tensioning roller.
Fig. 35
Release the cover lock (1), remove the side
cover (2) and lower the tensioning roller by pulling
up the operating lever (3).
Fig. 34
Lift the sanding drum off the floor by turning the
lowering lever at the handle upwards.
Fig. 33
Different sanding pressure stages can be selected
using the setting lever.
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