Actually my machine WILL have and did have a large disconnect switch to depower the entire machine. Only problem is that it is in the way back behind the machine and when the drive blew by the time I realized what the hell just happened and slapped the estop button AND ran around the back of the nine foot deep machine and pulled the main disconnect it was some considerable frying time. The fact that the E-stop killed the power was a welcome feature if you ask me. Again I don't want to get too far off track here because my intentions are to make the machine operate in as close to the original fashion as possible if not safer so this is my direction.
As far as some fancy PLC to kill power gradually for the spindle and drives that is all fine and dandy but my machine's spindle can power down as slow as it likes I just want it to do so WITHOUT power so in case of an emergency all is well. I also do not know if I mentioned it but I would much prefer to make this wiring as physically simple as humanly possible and still arrive at a machine that operates properly and has the all important electrical safeties in place. Ya know what I mean? I think if the estop kills power to all four drives(eventually five actually) and the mesa card has an enable feature to aid in power up that should work just fine for me as Andy pointed out. I would like to hear more about this kind of setup wiring. Thanks guys..peace Pete On Tue, Feb 12, 2013 at 11:16 AM, Stuart Stevenson <[email protected]>wrote: > Just one more scenario for fun. > The A and B axes hard limits on the cinci are wired to shut off the drive > when tripped. When an A or B hard limit is tripped and the drive is shut > off the head is tilted so far the weight causes the head to keep moving and > the pinion gear will drop off the end of the rack with an accompanying loud > clunk when the head drops to the frame. Recovery is fun. > On Feb 12, 2013 10:07 AM, "Pete Matos" <[email protected]> wrote: > > > Well that may work fine for you and honestly I love soft limits as much > as > > the next Guy but I honestly prefer to have the drives enabled in a limit > > switch trip situation so I can just backoff,backup and punt my way back > > into the program. It worked fine that way on my RF45. If I have my way > I > > will have both hard and soft limits working continually and the estop > > shutting down the show in an emergency situation. So I appreciate all > the > > ideas here but can we kinda keep the ideas pointing in that direction so > my > > already befuddled mind does not get any more befuddled than it has to be. > > LOL thanks guys....peace > > > > Pete > > > > > > > > On Tuesday, February 12, 2013, sam sokolik <[email protected]> > wrote: > > > We have a brake on the y axis also. Yes it is a pain. :) I should > > > disable the jog until after the machine is homed. Problem fixed. :) > > > > > > sam > > > > > > On 2/12/2013 9:43 AM, Pete Matos wrote: > > >> That would be a real bitch to have to back off a millhead on a VMC > off a > > >> limit with a motor brake installed... > > >> > > >> Also as per the complete power down issue, having been ringside > when > > my > > >> Y axis drive blew and watching the bright white light coming from > behind > > >> the machine I was VERY glad the estop circuit cut all power to the > > drives > > >> LOL....yeah I am good with watching the spindle coast to a stop any > > >> day....peace > > >> > > >> Pete > > >> > > >> On Tuesday, February 12, 2013, sam sokolik <[email protected]> > > wrote: > > >>> My axis limit switches are hooked directly into the estop loop. I > have > > >>> soft limits setup. The only time I have ever run into the > over-travel > > >>> limits was when I was jogging before homing (not paying attention... > ) > > >>> (and yes - I have to back off the limit manually) > > >>> > > >>> sam > > >>> On 2/12/2013 9:07 AM, andy pugh wrote: > > >>>> On 12 February 2013 14:53, Pete Matos <[email protected]> wrote: > > >>>>> Thanks for the info...can you explain that last part 7i77 GPIO? > > >>>> The 7i77 has 32 inputs and 16 outputs for general-purpose IO. (on > TB7 > > >>>> and TB8 I think). > > >>>> > > >>>>> Did I hear you correctly when you said you wired your limits and > > >>>>> homes in series and in with the estop circuit? > > >>>> No, as you say that would cause problems with backing off of a limit > > >> switch. > > >>>> In actual fact the machine I am describing doesn't yet have limit > > >>>> switches, it is a bit of a slow-burning project. They are likely to > be > > >>>> added fairly soon, though. > > >>>> However, my intention is to keep them entirely software-controlled. > I > > >>>> would be interested to hear opinions on the advisability of this. > > >>>> > > >>> > > >>> > > >> > > > > > ------------------------------------------------------------------------------ > > >>> 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 > > >>> [email protected] > > >>> https://lists.sourceforge.net/lists/listinfo/emc-users > > >>> > > >> > > > > > ------------------------------------------------------------------------------ > > >> 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 > > >> [email protected] > > >> https://lists.sourceforge.net/lists/listinfo/emc-users > > >> > > >> > > > > > > > > > > > > > > ------------------------------------------------------------------------------ > > > 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 > > > [email protected] > > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > > ------------------------------------------------------------------------------ > > 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 > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > ------------------------------------------------------------------------------ > 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Free Next-Gen Firewall Hardware Offer Buy your Sophos next-gen firewall before the end March 2013 and get the hardware for free! 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