Delta JT160 Manuel D'utilisation page 17

PLANING WARPED PIECES
If the wood to be planed is dished or warped, take light
cuts until the surface is flat. Avoid forcing such material
down against the table; excessive pressure will spring
it while passing the knives, and it will spring back and
remain curved after the cut is completed.
PLANING SHORT OR THIN WORK
When planing short or thin pieces, always use push
blocks to minimize all danger to the hands. Fig. 40,
illustrates using the Push Blocks properly.
Do not perform jointing operations on
material shorter than 10 inches (254 mm), narrower
than 3/4 inch (19 mm), or less than 1/2 inch (12.7
mm) thick (refer to Fig. 41).
DIRECTION OF GRAIN
Avoid feeding work into the jointer against the grain as shown in Fig. 42. The result will be chipped and splintered
edges. Feed with the grain as shown in Fig. 43 to obtain a smooth surface.
OUT-FEED
TABLE
WRONG FEED - AGAINST THE GRAIN
MATERIAL
IN-FEED TABLE
CUTTER
Fig. 42
MINIMUM AND MAXIMUM PLANING DIMENSIONS
1/2" (12.7 mm)
3/4" (19mm) MINIMUM
MINIMUM
6" (152.4 mm)
MAXIMUM
OUT-FEED
TABLE
CORRECT FEED - WITH THE GRAIN
17
Fig. 40
Fig. 41
MATERIAL
IN-FEED TA BLE
CUTTER
Fig. 43