17
TROUBLE SHOOTING
Symptom
Possible Causes And Check
8.
If washboard finish appears.
Knives may have been driven back into the head.
Machine may be completely out of adjustment.
Planer bed loose and rocking in ways.
9.
If revolution mark shows up.
Knives may be ground poorly.
Knives not set properly or evenly.
10.
If lines appear at right angles to the knife marks.
Knives may have nicked by overgrinding and
taking temper out of steel.
Chips may have wedged between rolls and tables.
Pressure bar may be dragging
11.
If stock twists in machine.
Pressure bar may be cocked.
Upper outfeed roller may be cocked.
Upper outfeed roller may have uneven spring
tension.
Table rollers may be cocked.
12.
If machine is noisy, vibrate and pounds.
Knives may be too dull.
Machine may not be leveled correctly.
Machine may not be on solid foundation.
Pressure bar may be set too low.
13.
If stock sticks or hesitates in machine
Pressure bar may be set too low.
Table rollers may be set too low.
Feed rollers may not be set low enough.
Cut may be too heavy.
A push board may help stock through machine.
Check moisture content
14.
If motor kicks out
Knives may be dull, thus overloading motors
Pressure bar may be set too low, putting drag on
motors.
Motors may be drawing high current because
other machinery in the plant in use has pulled
down the voltage.
Machine may be out of adjustment.
Table rollers may be set too low.
Too heavy cuts with continued work load.
