Workpiece
Inspection
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Before cutting wood, get in the habit of inspecting all workpieces for the following:
Material Type:I]^hbVX]^cZ^h^ciZcYZY[dg Xjii^c\cVijgVaVcYbVc"bVYZlddYegdYjXih! VcYaVb^cViZ"XdkZgZYlddYegdYjXih#8jii^c\ YgnlVaadgXZbZci^i^djhWVX`ZgWdVgYXgZViZh ZmigZbZan [^cZ Yjhi! l]^X] bVn gZYjXZ i]Z a^[Z d[ i]Z WZVg^c\h# I]^h bVX]^cZ ^h CDI YZh^\cZYidXjibZiVa!\aVhh!hidcZ!i^aZ!ZiX#
Foreign Objects (Figure 46):CV^ah!hiVeaZh! Y^gi!gdX`hVcYdi]Zg[dgZ^\cdW_ZXihVgZd[iZc ZbWZYYZY ^c lddY# L]^aZ Xjii^c\! i]ZhZ dW_ZXih XVc WZXdbZ Y^hadY\ZY VcY ]^i i]Z deZgVidg dg WgZV` i]Z WaVYZ! l]^X] b^\]i i]Zc [an VeVgi# 6alVnh k^hjVaan ^cheZXi ndjg ldg`e^ZXZ [dg i]ZhZ ^iZbh# >[ i]Zn XVc i WZ gZbdkZY!9DCDIXjii]Zldg`e^ZXZ#
ssLarge/Loose Knots: AddhZ `cdih XVc WZXdbZ Y^hadY\ZY Yjg^c\ i]Z Xjii^c\ deZgV" i^dc# AVg\Z `cdih XVc XVjhZ WaVYZ YVbV\Z# 8]ddhZ ldg`e^ZXZh i]Vi Yd cdi ]VkZ aVg\Z$ addhZ `cdih dg eaVc V]ZVY id Vkd^Y Xjii^c\ i]gdj\]i]Zb#
ssWet or "Green" Stock: 8jii^c\ lddY l^i] Vbd^hijgZXdciZcidkZg'%XVjhZhjccZX" ZhhVgn lZVg dc i]Z WaVYZ VcY n^ZaYh eddg gZhjaih#
Excessive Warping:Ldg`e^ZXZhl^i]ZmXZh" h^kZXjee^c\!Wdl^c\!dgil^hi^c\VgZYVc\Zg" djhidXjiWZXVjhZi]ZnVgZjchiVWaZVcYXVc bdkZjcegZY^XiVWanl]ZcWZ^c\Xji#9DCDI XjiZmXZhh^kZanlVgeZYlddY#
Minor Warping:Ldg`e^ZXZhl^i]ha^\]iXje" e^c\ XVc WZ hV[Zan hjeedgiZY ^[ i]Z XjeeZY h^YZ [VXZh i]Z iVWaZ dg [ZcXZ! Vh h]dlc ^c Figure 47#Dci]ZXdcigVgn!Vldg`e^ZXZhje" edgiZY dc i]Z WdlZY h^YZ l^aa gdX` Yjg^c\ V Xji!aZVY^c\idadhhd[Xdcigda#
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Figure 46.8]ddh^c\lddYl^i]dji[dgZ^\c dW_ZXihZbWZYYZY#
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Figure 47.8jii^c\lddYl^i]b^cdglVge^c\#
Because of its unpredictable nature, use extreme caution if cutting warped stock. The difference between acceptable and unac- ceptable warped stock varies from machine to machine. If you are in doubt,
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