Scheppach THM850 Originalbetriebsanleitung Seite 71

Unsatisfactory sur-
face finish
Machined surface
too rough
Machined surface
cracked
Workpiece speed
too low during
thicknessing
When thickness-
ing, chip ejection
obstructed (without
dust extractor).
When surface plan-
ing, chip ejection
obstructed (without
dust extractor)
With surface plan-
ing and thickness-
ing, chip ejection
obstructed (with
dust extractor).
Optional accessories
Planing blade blunt/
worn
Planing blade filled
with chips
Uneven feed
Workpiece contains
too much moisture
Workpiece was ma-
chined against the
grain
Too much material
planed at one pass
Workpiece was ma-
chined against the
grain
Too much material
planed at one pass
Too much chip re-
moval
Blunt knives.
Wood too humid.
Too much chip re-
moval
Too fast feed
Blunt knives.
Wood too humid.
Suction performance
too weak.
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Replace or sharpen blade
Remove chips
Feed the workpiece with
constant pressure and at
reduced speed
Dry workpiece
Machine the workpiece
from the opposite direction
Machine the workpiece in
several passes
Clean bench top and apply
a thin coating of lubricant
wax
Repair transport rollers
Set the lever for the thick-
nessing setting to the top
position
Reduce chip removal.
Replace knives
Dry workpiece
Reduce chip removal.
Reduce infeed speed.
Replace knives.
Dry workpiece
Use a dust extractor unit
having an airflow rate at
the suction connection of
at least 20 m/s.
HSS-planer blades
Two-pieces set
Item number: 3902202701
EAN: 4046664000310
GB | 71