What about a photo type switch w/ analog feedback? Some of them have set points on them that trigger a output when they are in a range. This way it would be non contact and could be safely place at some distance from the cutter?? Just a thought... Keyence has a few types of switches like this. Here is a link to Keyence http://world.keyence.com/
Just a thought, Mike On Mon, 2007-01-29 at 21:00 +0200, Alex Joni wrote: > On Plasma / Oxy-fuel cutting this is done with an capacitive (or > inductive) circular sensor around the cutting tool. That way it doesn't > matter in which direction you're cutting. > Of course those only work with metals.. not pumpkins (but that's a > different issue :) > > Regards, > Alex > > On Mon, 2007-01-29 at 10:31 -0800, ScottV wrote: > > I would think that you would need two sensors, one for each direction of > > cut. Or move the sensor. > > > > But you could cut in one direction, retract, return to the start, > > increment the rotation and start the next cut. > > Extra points if you work out a time delay between when the sensor read and > > when the bit reach that spot. > > > > If these are through-cuts you would just need a really long tool and an > > approximate start depth. > > Bornemann makes some long rasps for cutting foam - might work on pumpkin. > > We have some 1/2" diameter 7" long ones on order. > > > > ScottV > > > > > > ------------------------------------------------------------------------- > > Take Surveys. Earn Cash. Influence the Future of IT > > Join SourceForge.net's Techsay panel and you'll get the chance to share your > > opinions on IT & business topics through brief surveys - and earn cash > > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > ------------------------------------------------------------------------- > Take Surveys. Earn Cash. Influence the Future of IT > Join SourceForge.net's Techsay panel and you'll get the chance to share your > opinions on IT & business topics through brief surveys - and earn cash > http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
