Scheppach HMS850 Operating And Safety Instructions

26 GB
17. Troubleshooting
Fault Possible cause Remedy
Machine cannot be switched
on.
No power supply.
Carbon brush worn.
Chip extractor not mounted
Check power supply.
Take machine to your service point.
Machine does not work or
stops suddenly
Power cut
Motor or switch defective
Check microswitch
Check fuse, check overload switch on machine.
Have the motor or switch checked by an electrician.
Fit the chip extractor hood so that the microswitch is pressed.
Check fuses.
Due to the integrated lowvoltage protection, the machine does
not restart automatically. Upon return of the voltage, the ma-
chine must be switched on again.
Machine stops during plan-
ing.
Planing blade blunt/worn
Overload switch has tripped
Check microswitch
Too much chip removal
Too fast feed
Replace or sharpen blade
Switch on the motor again once it has cooled
Fit the chip extractor hood or bench lock so that the micros-
witch is pressed.
Reduce chip removal.
Reduce infeed speed.
Workpiece jams during
thicknessing
Cutting depth too great Reduce cutting depth and machine the workpiece in several
passes
Speed decreases when
planing
Too much chip removal
Too fast feed
Blunt knives.
Reduce chip removal.
Reduce infeed speed.
Replace knives.
Unsatisfactory surface finish Planing blade blunt/worn
Planing blade filled with chips
Uneven feed
Replace or sharpen blade
Remove chips
Feed the workpiece with constant pressure and at reduced
speed
Machined surface too rough Workpiece contains too much moisture Dry workpiece
Machined surface cracked Workpiece was machined against the grain
Too much material planed at one pass
Machine the workpiece from the opposite direction
Machine the workpiece in several passes
Workpiece speed too low
during thicknessing
Workpiece was machined against the grain
Too much material planed at one pass
Clean bench top and apply a thin coating of lubricant wax
Repair transport rollers
Set the lever for the thicknessing setting to the top position
When thicknessing, chip
ejection obstructed (without
dust extractor).
Too much chip removal
Blunt knives.
Wood too humid.
Reduce chip removal.
Replace knives
Dry workpiece
When surface planing, chip
ejection obstructed (without
dust extractor)
Too much chip removal
Too fast feed
Blunt knives.
Wood too humid.
Reduce chip removal.
Reduce infeed speed.
Replace knives.
Dry workpiece
With surface planing and
thicknessing, chip ejection
obstructed (with dust extrac-
tor).
Suction performance too weak. Use a dust extractor unit having an airflow rate at the suction
connection of at least 20 m/s.
Optional accessories
HSS-planer blades
Two-pieces set
Item number: 3902202709
EAN: 4046664042655

Scheppach HMS850 Specifications

General

Motor Power	1250 W
Planing Width	204 mm
Max Planing Depth	2 mm
Max Thicknessing Height	120 mm
Feed Rate	8 m/min
Table Size	737 x 210 mm
Cutter Block Speed	8000 rpm
Thicknessing Width	204 mm
Motor	230 V, 50 Hz