KNOVA KN CM-11MA, Manual

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Blade lock
screw
Cutterhead
Blade
clamp
Jack screw
Blade
8
MAINTENANCE
WARNING
Turn the planer off and unplug from the power source
before proceeding to do any maintenance work.
CHECKING FOR WORN BLADES
Condition of blades will affect precision of cut. If blade wear
is not observed when checking the blade height, the quality
of cut will indicate the blade condition, dull blades will tear
rather than sever wood fiber. A raised grain will occur when
dull blades pound on wood where there is a difference in
density. A raised ridge will be produced where the blades
have been nicked.
SHARPENING BLADES
If blades are nicked they must be replaced or reground, they
can be reground several times until they become 21 mm side.
NOTE: many shops do not have capabilities to resurface
blades. Never install unbalance blades or blades reground
less than 21 mm wide.
21 mm wide
38º
REPLACING BLADES
Unplug the planer from power source, block the blade guard
from closing, loosen and remove the four blade lock screws
securing the blade and blade clamp, lift blade and blade clamp
from cutter head, clean any sawdust and resin buildup from
cutter head and blade clamp, place the new blade against
the blade clamp and replace in cutter head. Secure blade and
BRUSH INSPECTION AND REPLACEMENT
Turn planer off and disconnect from power source. Brush
life depends on amount of load on motor. Regularly
inspect brushes after 50 hours of use.
To inspect or replace brushes, remove the bottom cover and
disassemble the motor, loosen brush cap and remove it from
motor, replace bushes if springs are worn or carbon is worn
down to 10mm in length or less.
NOTE: Replace brushes in sets only.
Replace brushes and tighten brush cap, replace bottom
cover and the screws.
blade clamp using the four blade lock screws, do not tighten
the blade lock screws until you have checked the blade height,
adjust as required using straight edge as described in
“adjusting blade height”. Tighten blade lock screws, recheck
blade adjustment and make sure blade is still level with out
feed table. Repeat procedure to replace the other blade,
remove the scrap wood release blade guard.
TROUBLESHOOTING
CORRECTIVE ACTION SYMPTOM POSSIBLE CAUSE(S)
Motor starts
slowly or fails to
come to full speed.
1. Defective motor windings.
2. Clogged wood chips.
1. Have motor replaced/repaired.
2. Make a shallower cut and attach a dust collection
device to the exhaust port. Inspect chip blower
assembly and fan belt.
Motor does
not start.
1. Defective switch.
2. Defective motor.
3. Low line voltage.
1. Have switch replaced.
2. Have motor replaced/repaired.
3. Correct low line voltage condition.
Motor running
too hot.
1. Motor overloaded.
2. Restricted air circulation
due to dust accumulation.
1. Reduce load on motor.
2. Clean dust and restore normal air circulation.
Snipe (gouging
at end of boards).
1. Dull blades.
2. Inadequate support of long boards.
3. Uneven feed.
1. Replace or sharpen blades.
2. Support long boards.
3. Feed the workpiece at a consistent rate.