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FEEDINGTOOSLOWLY
See Figure 21.
It is possibleto spoil a cut by movingthe routerforward
too slowly.When you advance the routerIntothework too
slowly,the revolvingcutter does not diginto newwood
fast enough to take a bite; instead, itmerely scrapes sway
sawdust-like particles. Scrapingproducasheat, which
can glaze, burn, or mar the cut and In extremecases, can
overheat the cutter, dastroy'mg itshardness.
When the cutter is scrapinginstead of cutting,controlling
the router is more difficult.With practically no load on the
motor,the cutter revolvesat closeto top RPM, and has
a much greaterthan normaltendency to bounce offthe
sides of the cut(especially ifthe wood hasa pronounced
grain with hardand softareas). As a result, thecut pro-
duced may have rippled,insteadof straight,sides.
Feedingtoo slowlycanalso causethe routertotake offina
wrong directionfrom the intended [(neofcut. A(waysgrasp
and hold the muter firmlywith both handswhen routing.
You candemot whenyou are feeding the router tooslowlyby
the runaway,high-pitched sound of the motor or by feeling
thewiggle of the cutter in the cut.
TOOSLOW Fig. 21
DEPTH OF CUT
,SeeFigure#22- 23.
Depth ofcut is importantbecause it affects the rate of
feed that, In turn, affects the quality of the outand the
possibilityof damage to thetool'smotor and cutter.
DEPTH
0FCUT
WIDTHOFCUT
Fig. 22
2ND
PASS
A deep out requiresa slowerfeed than a shallow one. A
cutthat is too deep willslow thefeed so that the cutter
isscraping ratherthan cutting.A too deep out can cause
sma((ercuttersto be brokenoff. Cuttersthat are 1/16 (n.
in diameterare easilybrokenoffwhen subjected totoo
much side thrust.A largeenough cutter isnot likelyto
break, but attempting a outthat Istoo deep may result
in s roughcut, and itmay be difficultto guide and con-
trolthe cutter as desired.Itis recommended thatyou do
not exceed 1/8 in.depth of cut in a singlepass, regard-
lessof the cutter size or the softness orconditionof the
workpiece.
2ND
PASS
18T
PASS
Fig. 23
To make deeper cuts, make as many successivepasses
as needed, loweringthe cutter 1/8 in. for each new pass.
Tosave time, performall the cutting necessary at one
depth settingbeforelowering t'necutter for the nextpass.
Thiswill Insurea uniformdepth when you complete the
finalpass.
NOTE; Do not removemore than 1/8 in.in a singlepass.
Excessivedepth ofcut can resultin loss of controland the
possibilityofsedous personalInjury.
21
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