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TAB LE----If- -- -+�
ROLL
(IDLER)
1 0 - 23-50
PLANER OPERATIONS
The following instructions will give the inexpe
rienced operator a start on the usual planer operations.
Use scrap material for practice, checking the settings
before attempting the job at hand.
First the stock is placed on the table and moved
forward until it is pushed into the machine by the
serrated in-feed roll which is held down by means of
compression springs at each end of it. After the stock
passes beyond this roll a short distance it comes in
contact with the chip breaker. The chip breaker pivots
on the front tie bar and automatically raises with the
serrated in-feed roll.
The shavings removed from the stock are carried
up and thrown out at the rear of the machine. As the
stock leaves the revolving knife blades in the cutter
head it passes beneath a pressure bar, the purpose of
which is to hold down the stock flat on the table firmly
as the knife blades are performing the job. The pres
sure bar also insures a perfectly smooth planed surface
since it helps to prevent chattering, waves in the mate
rial and any irregular planing of the stock. It must be
set even with the cutting circle, and it is easily ad
justed to it. Its pressure can be readily varied as
desired.
The stock next passes beneath the smooth out-feed
roll which pulls the stock out of the machine at the
same rate of feed as the in-feed roll pushes the stock
into the machine. This roll is also held down by means
of compression springs to give it the required pressure
for the stock being planed. Refer to Fig. 40.
HEX. HD. SET SCR.
CROSS
SECTIONAL VIEW
OF PLANER HEAD
F i g . 40.
It can be noticed that the table of the planer has
two cylindrical rollers (idlers) which can be adjusted
for the type of lumber that passes over the table. For
smooth lumber these rolls are best set at .005" above
the table surface and for rough lumber these rollers can
be set above the table surface the desired amount up to
.010" . . Caution : If the table rollers (idlers) are adjusted
too hlgh (more than .010") the knife blades in the cut
ter head may chip or splinter the edge on the end of the
stock. The object of these (idler) rollers is to eliminate
the lumber from dragging on the table surface. The
table rollers are spaced apart 5Yz" on centers.
Short pieces of stock less than 6" long must be
fed through the machine by a "following block" which
has the same thickness as the piece being fed.
The planer is a machine which will reduce stock
to the thickness required. It will not reduce or elimi
nate "warping" of the stock as we sometimes think.
To remove warping from the stock it must be jointed.
The planer will then perform the operation of reducing
the stock to the desired thickness.
After a little practice , usually the operator can
sense by the sound of the machine whether the cut
being taken is too heavy. Always decrease the cut by
lowering the table slightly. Usually a 1/16" cut is
sufficient for most operations.
We suggest taking successive light cuts until the
desired thickness is obtained. Where several pieces
are to be planed, the thickest piece is planed first, then
the others are planed in order of their thickness.
17
KNIFE BLADE
Prepari ng Stock For Planing
RIGHT
HAND
COLUMN
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