CHATTER:
Chatter marks usually appear on thin material. See Figure 21. Even at their lowest point, the table rolls are too high to handle thin material. Solve the problem by either using a slave board or making an auxiliary table out of Formica countertop material, cleating at each end of the table to keep it stationary.
TAPERS:
If the machine planes a taper across the full width of the board, as shown in Figure 22, the table is not parallel with the cutterhead. First check that all knives are properly installed with equal protrusion from the cutterhead. If they are, then the table itself must be adjusted. See “Table Adjustment” above.
TWISTING:
If material twists while feeding through the planer, either the table rolls, pressure bar, or outfeed roll may be out of level. Place the bed and feed roll gauge (or a gauge block) on the table directly under the right end of the infeed roll, move table up until light contact is made between roll and gauge. Move the gauge to the left end and check. Repeat this process under the chipbreaker, pressure bar, and outfeed roll until the problem is discovered. Generally the pressure bar will be out of level due to its constant adjustment to compensate for knife wear. At this point, level the pressure bar (or other part of the planer) and proceed with operation.
HALTED FEEDING:
If the infeed roll takes stock away from you while feeding, then feeding stops immediately, the chipbreaker is too low, causing material to hit high on the heel. Reset the chipbreaker.
In a similar situation, the infeed roll takes the stock, the chipbreakers lift, and just as you hear the knives contact the material, then it stops feeding. In this case the pressure bar is too low. Reset the pressure bar according to instruction in this manual.
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