Some basic chemistry is in order here. The conductivity of distilled water is incredibly low. So also is the conductivity of wood, because it is completely nonpolar and does not allow any charges to migrate, like distilled water. The main chemical used in "pressure treating" wood is CCA, or Chromium Copper Arsenate. It is NOT that copper is conductive that allows wet pressure treated wood to trigger the SawStop. This is actually a sadly common misconception that metal-containing compounds are somehow conductive. Sodium is very metallic, and is a conductor, but Sodium chloride (table salt) is not. The copper is reacted with the arsenate ion but when it dissociates in water, these ions can migrate and allow charges to flow, similar to how the delocalized electrons in a metal can migrate to allow charge to flow. The migration of charges is what activates the SawStop.
The same goes for metal, as a conductor, it will allow charges to migrate like sweat can and trigger the SawStop.
That is very true, but it seem the inventor has already considered this drawback to the system. I agree with Killjoy that SawStop and your saw thingy (as we are now calling it) are both a partial solution to the problem.boyntonstu wrote:A contractor cannot wait until wood dries to cut it.
But... there seems to be no end to poor Stu's trolling.
Can you think of any way to cut yourself on a table saw at all when your hands are 12" away? I find it appropriate to quote something Ragnarok already tried to tell you:boyntonstu wrote:Can you think of any way to cut yourself using my saw when your hands are 12" away from the blade the entire time.
Perhaps pride should be tempered with common sense.Ragnarok wrote:It doesn't matter, because the circumstances in which you might need to do such a thing under what are rather daft self imposed limitations are inconceivably slim.