On 11/12/2014 07:52 AM, Todd Zuercher wrote: ... snip > > Not sure how they turn them on/off. Some sort of cam system that > separates the magnets from the conductive surface internally. ... snip
I believe the magnetic bases like this: http://littlemachineshop.com/Products/Images/480/480.1593.jpg contain two magnets. One is a cylindrical magnet in the center of the base with an attached handle. The other surrounds the center magnet. When you turn the handle to Off, the two fields are phased at 180 degrees (magnetically not geometrically) and cancel each other. The On position aligns the fields and combines the magnetic force. A magnetic release brake is similar except an electro-magnet is used to cancel the field from the permanent magnets: https://www.cst.com/Applications/Article/Magnetostatic-Simulation-Of-A-Magnetic-Brake There are a lot of options for manipulating magnetic fields. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ ------------------------------------------------------------------------------ Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://pubads.g.doubleclick.net/gampad/clk?id=154624111&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
