Jet JWP-15B, Operating Instructions And Parts Manual

Page: 19 / 36

19
10.2 Mechanical and electrical problems
Table 5
Symptom Possible Cause Correction *
Uneven depth of cut
side to side.
Knife projection from cutterhead is
incorrect (15B only).
Adjust knife projection.
Table not parallel to cutterhead. Adjust table/cutterhead parallelism.
Board thickness does
not match depth of cut
scale.
Depth of cut scale is incorrect. Adjust depth of cut scale.
Chain is jumping.
Inadequate tension. Adjust chain tension.
Sprockets misaligned. Align sprockets.
Sprockets are worn. Replace sprockets.
Machine will not
start/restart or
repeatedly trips circuit
breaker or blows
fuses. No incoming power. Verify power connections to planer.
Overload protection has activated.
When planer overloads on the circuit
breaker built into the motor starter, it
takes time for the machine to cool down
before restart. Allow unit to adequately
cool, then press reset button.
Planer frequently trips.
One cause of overloading trips which is
not electrical in nature is too heavy a
cut. The solution is to take a lighter cut.
If too deep a cut is not the problem,
check for other electrical items (dust
collectors, lights, heaters, etc.) being
used on the same circuit. The planer
should be wired to a dedicated circuit.
Building circuit breaker trips or fuse
blows.
Verify that planer is on a circuit of
correct size. If circuit size is correct,
there is probably a loose electrical lead.
Check amp settting on motor starter.
Loose electrical connections.
Go through all the electrical connections
on the planer including motor
connections, verifying the tightness of
each. Look for any signs of electrical
arcing which is a sure indicator of loose
connections or circuit overload.