On 12 February 2013 13:06, Pete Matos <petefro...@gmail.com> wrote: > Basically my machine has a huge rotary switch with a big > lever that was originally used to switcg power to the machine on and off.
I think that should stay, and kill absolutely everything. (I have such a switch on my machine). When I refer to a "contactor" mean something like: http://uk.rs-online.com/web/p/contactors/7434908/ Which can be used to kill all drive power reliably. Actually, there are special relays for the job. They are a lot more expensive but are probably what you should use in an industrial setting. http://ab.rockwellautomation.com/relays-and-timers/safety-relays I am not a qualified electrican and I don't know what the differences are. > I know when the original control was switched on nothing > was energized until you got the computer to a certain initialization point > then you would hit another button to energize the drives after which you > would align the machine which is basically homing everything This is how my machine works. When I power it up only the PC and 24/12/5V PSUs are live. The axis drive PSU and the spindle VFD are completely unpowered until the Mesa card comes out of watchdog mode and I press the machine-on button on the screen. That turns on an output on a Mesa card, and as long as the E-stops (wired in series with each other and the Mesa IO board) are also closed the main contactor is pulled-in and the drives power up. If an e-stop is hit, the drives shut down and the GUI goes into e-stop if the PC crashes, then the Mesa watchdog dies, and the drives power down. if I press the on-screen e-stop then the drives power down (and I can't turn back on for 10 seconds, due to a timer I put in HAL) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Free Next-Gen Firewall Hardware Offer Buy your Sophos next-gen firewall before the end March 2013 and get the hardware for free! Learn more. http://p.sf.net/sfu/sophos-d2d-feb _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
