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<p><span style="font-family: Arial; font-size: 10pt; font-weight: 700;">Thomas,</span></p><p><span style="font-family: Arial; font-size: 10pt; font-weight: 700;">SawStop sent me an additional list as follows:</span></p><p><span style="font-family: Arial; font-size: 10pt; font-weight: 700;">Other sources of </span></p>
<ul style="list-style-type: none">
<li>
<p><span style="font-size: 7.000000pt; font-family: 'Wingdings'"> </span><span style="font-size: 10.000000pt; font-family: 'ArialMT'">Metal sheeting such as Aluminum or copper
</span></p>
</li>
<li>
<p><span style="font-size: 7.000000pt; font-family: 'Wingdings'"> </span><span style="font-size: 10.000000pt; font-family: 'ArialMT'">Grounded metal (i.e. the blade guard splitter, the riving knife, a metal jig, or a metal tape measure
</span></p>
<p><span style="font-size: 10.000000pt; font-family: 'ArialMT'">in contact with the table top.)
</span></p>
</li>
<li>
<p><span style="font-size: 7.000000pt; font-family: 'Wingdings'"> </span><span style="font-size: 10.000000pt; font-family: 'ArialMT'">Relatively large masses of ungrounded metal, such as a tape measure not in contact with the table
</span></p>
<p><span style="font-size: 10.000000pt; font-family: 'ArialMT'">or a combination square or ruler)
</span></p>
</li>
<li>
<p><span style="font-size: 7.000000pt; font-family: 'Wingdings'"> </span><span style="font-size: 10.000000pt; font-family: 'ArialMT'">Foil-backed insulation
</span></p>
</li>
<li>
<p><span style="font-size: 7.000000pt; font-family: 'Wingdings'"> </span><span style="font-size: 10.000000pt; font-family: 'ArialMT'">Mirror-backed plastic (usually a metallic layer deposited onto the back of the plastic)
</span></p>
</li>
<li>
<p><span style="font-size: 7.000000pt; font-family: 'Wingdings'"> </span><span style="font-size: 10.000000pt; font-family: 'ArialMT'">Metallic paint layers (e.g. gold paint on picture frames)
</span></p>
<p><span style="font-size: 10.000000pt; font-family: 'Arial'; font-weight: 700">Other conductive materials:
</span></p>
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<li>
<p><span style="font-size: 7.000000pt; font-family: 'Wingdings'"> </span><span style="font-size: 10.000000pt; font-family: 'ArialMT'">Conductive laminate layers (some countertops have a foil layer behind the formica)
</span></p>
</li>
<li>
<p><span style="font-size: 7.000000pt; font-family: 'Wingdings'"> </span><span style="font-size: 10.000000pt; font-family: 'ArialMT'">Black melamine board that has carbon black in the melamine layer
</span></p>
</li>
<li>
<p><span style="font-size: 7.000000pt; font-family: 'Wingdings'"> </span><span style="font-size: 10.000000pt; font-family: 'ArialMT'">Carbon composite materials (helicopter blades, ski poles, fishing poles, tennis racquets)
</span></p>
</li>
<li>
<p><span style="font-size: 7.000000pt; font-family: 'Wingdings'"> </span><span style="font-size: 10.000000pt; font-family: 'ArialMT'">Electronic circuit boards (because of the conductive layers)
</span></p>
</li>
<li>
<p><span style="font-size: 7.000000pt; font-family: 'Wingdings'"> </span><span style="font-size: 10.000000pt; font-family: 'ArialMT'">Cell phones (you might think it’s listed here just for humor value, but a shop student actually did
</span></p>
<p><span style="font-size: 10.000000pt; font-family: 'ArialMT'">run his cell phone into a saw to see what would happen)
</span></p>
</li>
<li>
<p><span style="font-size: 7.000000pt; font-family: 'Wingdings'"> </span><span style="font-size: 10.000000pt; font-family: 'ArialMT'">Uncured glue layers (wet glue is a good electrical simulator of a person)
</span></p>
</li>
<li>
<p><span style="font-size: 7.000000pt; font-family: 'Wingdings'"> </span><span style="font-size: 10.000000pt; font-family: 'ArialMT'">Wet pressure-treated materials (the metallic salt solutions use to treat the wood are quite
</span></p>
<p><span style="font-size: 10.000000pt; font-family: 'ArialMT'">conductive unless very dry)
</span></p>
</li>
<li>
<p><span style="font-size: 7.000000pt; font-family: 'Wingdings'"> </span><span style="font-size: 10.000000pt; font-family: 'ArialMT'">Very wet wood (though usually the saw will try to shut down rather than activating the brake)
</span></p>
<p><span style="font-size: 10.000000pt; font-family: 'Arial'; font-weight: 700">Basically you need to avoid cutting conductive materials. If you are in doubt about whether any
material poses a risk of spuriously activating the brake, you can place the saw in bypass mode
and make a test cut or two. </span><span style="font-size: 10.000000pt; font-family: 'ArialMT'">If the material would have triggered the brake, the saw will blink its red LED
(until the blade stops) to indicate that contact was detected. If there are no indications of detection, you
can proceed to cut in normal mode. If detection is indicated, the material needs to be cut in bypass mode.
</span><span style="font-size: 10.000000pt; font-family: 'Arial'; font-weight: 700">When in doubt, test in bypass.
</span></p>
<p><span style="font-size: 10.000000pt; font-family: 'Arial'; font-weight: 700">A side note: Nails and screws in and of themselves are not large enough to load the signal and
cause an activation. </span><span style="font-size: 10.000000pt; font-family: 'ArialMT'">However, if the operator or the table top is in direct contact with the other end of </span><span style="font-family: ArialMT; font-size: 10pt;">the nail or screw, a conductive path with be completed as if the blade contacted the person or grounded surface.
Also, there is a small chance that in cutting through a nail or screw, a piece of debris could be carried by a blade
tooth into the gap between the brake and blade. If the gap is bridged by conductive debris, then an activation can
occur. </span></p></li></ul></li></ul></div></div></div></div>Thank you,<div>Matt Evans</div></div><div>Technical Director</div><div>University of Dayton</div>
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