Planer Operations - Jet JJP-8BT Operating Instructions And Parts Manual

To edge:
1. Make sure the fence is set to 90°. Double
check it with a square.
2. Inspect stock for
direction (refer to Direction of Grain on
previous page).
Figure 24
3. If the board is bowed (curved), place the
concave edge down on the infeed table.
4. Set the infeed table for a cut of approximately
1/16 inch.
5. Hold the stock firmly against the fence and
table, feed the stock slowly and evenly over
the cutterhead.
Beveling
Beveling an edge is the same operation as edge
jointing, except that the fence is tilted to a specified
angle.
Make certain material being beveled is over 12
inches long, more than 1/4 inch thick and 1
inch wide.
To bevel:
1. Use a bevel gauge to determine the desired
angle. Then set the fence to the same angle.
2. Inspect stock for
direction (refer to Direction of Grain on
previous page).
3. Set the infeed table for a cut of approximately
1/16.
4. If the board is bowed (curved), place the
concave edge down on the infeed table.
5. Feed the stock through the cutterhead, making
sure the face of the stock is completely flat
against the fence and the edge is making solid
contact on the infeed and outfeed tables
(Figure 25).
For wood wider than 3 inches – hold with
fingers close together near the top of the
stock, lapping over the board and extending
over the fence.
For wood less than 3 inches wide – use
beveled push blocks and apply pressure
toward the fence. Keep fingers near top of
push block.
soundness and grain
soundness and grain
Several passes may be required to achieve full
bevel.

12.5 Planer operations

Depth of Cut
Thickness planing refers to the sizing of lumber to a
desired thickness while creating a level surface
parallel to the opposite side of the board. Board
thickness that the planer will produce is indicated by
the scale (see Table Height Adjustment on page
13). Preset the planer to the desired thickness of the
finished workpiece using the gauge. The depth-of-
cut is adjusted by raising or lowering the planer table
(D, Figure 14) using the adjustable handle (C,
Figure 14).
The quality of thickness planing depends on
the operator's judgment about the depth of cut.
The depth of cut depends on the width,
hardness, dampness, grain direction and grain
structure of the wood.
The maximum thickness of wood that can be
removed in one pass is 5/64" for planing
operations on workpieces up to 5-1/2" wide.
The workpiece must be positioned away from
the center tab on the rollercase to cut 1/8".
The maximum thickness of wood that can be
removed in one pass is 1/16" for planing
operations on workpieces from 5-1/2" up to 8"
wide.
For optimum planing performance, the depth
of cut should be less than 1/16".
The board should be planed with shallow cuts
until the work has a level side. Once a level
surface has been created, flip the lumber and
create parallel sides.
Plane alternate sides until the desired thick-
ness is obtained. When half of the total cut has
been taken from each side, the board will have
a uniform, moisture content and additional
drying will not cause it to warp.
The depth of cut should be shallower when the
workpiece is wider.
When planing hardwood, take light cuts or
plane the wood in thin widths.
Make a test cut with a test piece and verify the
thickness produced.
17
Figure 25