3 Issues - Oregon 720-120 Original Instruction Manual

720-120

7 3 Issues

Issues
The depth of the gullets on the
left and right cutters are unevenly
sharpened.
The lengths of the right and left
cutters are not the same.
One of the troubleshooting indicator
LEDs on the control panel is lit up.
The chain is not fixed during
sharpening.
The wrong cutter is sharpened.
The top-plate angles are not the
same (e.g. 35° in one direction and
25° in the other) when the grinding
head turns in the 2 different
directions.
Wrong parts of the cutters are
sharpened.
The grinding head "falls" without
slowing down before it touches the
cutter.
An incorrect number of cutters are
sharpened (too many or too few).
The cutters are not correctly
sharpened.
The top-plate angle is too
aggressive.
The metal of a cutter turns blue
during grinding, which is an
indication of damaged or weakened
metal.
585124ab_Auto Chain Grinder_OM_720-120.indd 43
Possible cause
The grinding wheel is not
centered between the cutters.
The left-right alignment screw is
incorrectly set.
There is an issue with one of the
motors. An alarm is triggered
and must be corrected.
The chain vise is loose.
The air pressure is too low.
The chain was in the incorrect
position when the machine was
started.
The M6 nuts needs to be
adjusted.
The pitch adjustment wing is
not in the correct position for the
type of chain used.
A cutter was caught on the
chain pusher because the chain
pusher is worn out and the
material is uneven.
The wire is worn and needs to
be adjusted.
An incorrect number of cutters
was set on the counter.
The counter was not reset before
the machine was operated.
Incorrect settings are used.
The top-plate angle setting is
incorrect.
The grinding speed is set
too high and the metal is
overheated.
7 Troubleshooting
Corrective procedure
See the instructions in step 14 of
section 5.2.5, "Making the grinding
settings."
See step 13 of section 5.2.5, "Making
the grinding settings."
See section 7.4, "Troubleshooting
indicators."
See section 6.5, "Adjusting the chain
lock."
Check and adjust the air pressure.
Find the cutter to be sharpened and
make sure that it is in the correct
position before the machine is
operated. See section 5.2.5, "Making
the grinding settings."
See section 5.2.3, "Setting the top-plate
angle."
See section 5.2.5. "Making the grinding
settings".
Loosen the screw that holds the chain
pusher in its position. Discard the chain
pusher in accordance with local, state,
and national laws and regulations.
Attach a new chain pusher and fasten
the screw.
File the chain pusher with a rasp until
the material is even.
See section 6.6, "Checking and adjust
the wire."
See section 5.2.5, "Making the grinding
settings."
See section 5.2.5, "Making the grinding
settings."
See section 5.2.5, "Making the grinding
settings."
See section 5.2.5, "Making the grinding
settings."
Replace the damaged cutter or discard
the chain. Lower the speed on the
grinding speed knob, see section 3.6.2,
"Grinding speed knob."
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3/1/17 3:05 PM