Troubleshooting; Optional Accessories - Scheppach HMS850 Bedienungs- Und Sicherheitshinweise

17. Troubleshooting

Fault Possible cause
Machine cannot be switched No power supply.
on. Carbon brush worn.
Chip extractor not mounted
Machine does not work or Power cut
stops suddenly Motor or switch defective
Check microswitch
Machine stops during plan- Planing blade blunt/worn
ing. Overload switch has tripped
Check microswitch
Too much chip removal
Too fast feed
Workpiece jams during Cutting depth too great
thicknessing
Speed decreases when Too much chip removal
planing Too fast feed
Blunt knives.
Unsatisfactory surface finish Planing blade blunt/worn
Planing blade filled with chips
Uneven feed
Machined surface too rough Workpiece contains too much moisture
Machined surface cracked Workpiece was machined against the grain
Too much material planed at one pass
Workpiece speed too low Workpiece was machined against the grain
during thicknessing Too much material planed at one pass
When thicknessing, chip Too much chip removal
ejection obstructed (without Blunt knives.
dust extractor). Wood too humid.
When surface planing, chip Too much chip removal
ejection obstructed (without Too fast feed
dust extractor) Blunt knives.
Wood too humid.
With surface planing and Suction performance too weak.
thicknessing, chip ejection
obstructed (with dust extrac-
tor).

Optional accessories

26 GB
Remedy
Check power supply.
Take machine to your service point.
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.
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.
Reduce cutting depth and machine the workpiece in several
passes
Reduce chip removal.
Reduce infeed speed.
Replace knives.
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 thicknessing 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: 3902202709
EAN: 4046664042655