On Sunday 21 July 2019 12:57:18 Sam Sokolik wrote: > sorry - It is actually this video > NP Sam, I enjoyed the tour. Quite a machine. > https://www.youtube.com/watch?v=XSojs1pUSlg > > On Sun, Jul 21, 2019 at 11:48 AM Sam Sokolik <samco...@gmail.com> wrote: > > I should say - we normally have the estop loop enables power to the > > drives, hydraulics and vfd. Then the power button is what actually > > enables the drives so linuxcnc is in control. > > > > (I am skunkworks - my name is sam and not chris ;) ) Chris is a > > developer for linuxcnc... > > > > This video sort of explains/shows the estop.. > > > > https://www.youtube.com/watch?v=fTI_Ypv4FQE > > > > On Sun, Jul 21, 2019 at 11:37 AM Sam Sokolik <samco...@gmail.com> wrote: > >> I use estop type 4... > >> > >> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Sample_HAL_And_ClassicLadd > >>er > >> > >> These examples use classic ladder - although I think there is a hal > >> component that does something similar > >> > >> http://linuxcnc.org/docs/2.7/html/man/man9/estop_latch.9.html > >> > >> On Sun, Jul 21, 2019 at 7:35 AM Gene Heskett <ghesk...@shentel.net> > >> > >> wrote: > >>> On Sunday 21 July 2019 07:08:52 andrew beck wrote: > >>> > Hi guys > >>> > > >>> > I have got my cnc mill control panel working ok now just have > >>> > some questions about the best and proper way to implement the > >>> > safety E stop circuit and initial power on of the cnc machine > >>> > > >>> > I did some searching of course, but thought I would ask here and > >>> > see what the latest and best way is. searching on the forum, > >>> > some of the info was a little dated. so if anyone has any > >>> > advice I would most appreciate it. I saw on Youtube what > >>> > samco(skunkworks) (I think his name is chris Radek) has done. > >>> > And this is pretty much what I want i think. > >>> > > >>> > I think this should happen when the E stop is pushed. > >>> > > >>> > Cut control power to all servos and main spindle VFD. > >>> > >>> I am probably a poor one to advise since I have not a separate > >>> E-Stop on any of my machines, depending on the f1 and f2 keys to > >>> do it all, which also still leaves me subject who owns the > >>> keyboard focus. > >>> > >>> > (I think I may need to just send a E stop signal to the VFD as > >>> > it doesn't have control power that I can cut.) It seems a big > >>> > extreme to cut main power and possible damage the vfd with loose > >>> > high voltages etc. > >>> > >>> I use the F1 key to enable power and this includes the vfd by way > >>> of the usual 40 amp 400 volt SSR's which are easily controlled. > >>> The F2 key enables motion. > >>> > >>> In this way you have an onscreen tally as the the machines state. > >>> > >>> > It should tell linuxcnc that the E stop is pushed. > >>> > I need to set up a latching relay somehow to make sure the E > >>> > stop doesn't turn back on until I turn it on within linuxcnc. > >>> > > >>> > Servo Power on setup. > >>> > > >>> > I want a Button I can push which enables all the servo drives( > >>> > there is a Servo on pin on the servo drives) > >>> > >>> This can be done in the .hal file by enableing the servo drives > >>> from the status of the F1 key latch. > >>> > >>> > and then also enable the vfd > >>> > >>> Same here, fire the SSR's from the same signal. > >>> > >>> > however I need to do that. This is separate to the E stop. > >>> > Currently I am only using step and direction control and I am > >>> > wondering how hard it will be to tie in the encoder signals to > >>> > linux cnc with another mesa card. otherwise when i push the E > >>> > stop I will have to re home the machine. > >>> > >>> I have not tried to do that, you will have lost your home if the > >>> power is > >>> cut. I use steppers and with the drivers still enabled by F1, the > >>> stop distance is rarely more than 1 count at working speed. But > >>> can if in a rapid move at the time of the stop take several steps > >>> which the feeback encoder will miss, so you should rehome. > >>> Servo's are another story, and should return to the null point > >>> when re-enabled. > >>> > >>> Here, I consider the F2 key as an E-stop as it stops motion as > >>> fast as it > >>> can, while leaving power on everything. > >>> Leaving power on the servo's, it seems to me would give a faster > >>> stop than killing power with its slow decay to zero. > >>> > >>> I don't think it would be too hard to rig a big red button to be > >>> the equ of pressing the F2 key. I made progress on getting more > >>> spare inputs, and am considering something like a doorbell button > >>> I can slap. But I can't find such a button without a light bulb > >>> across the contacts. You would have to cut the light bulb out and > >>> remove it, otherwise the switch is closed forever to a bob input > >>> pin. One could supply that pin with enough pullup power to light > >>> the bulb, but most doorbell are 24 volt circuits, so an si diode > >>> would be needed to protect the bob's input. > >>> > >>> So I'm not "kosher" but unless lcnc doesn't have keyboard focus, > >>> it works > >>> for me, and the diffs are minimal. I'd have a bigger problem > >>> figuring out where to put the switch so its in a consistent > >>> location so muscle memory could be depended on once you got used > >>> to it. > >>> > >>> Believe me, there is nothing more frustrating that recognizing the > >>> sound of a 15 hp water pump thats suddenly single phased, and your > >>> hand is headed to the off button, but is still 18" from it when > >>> the lights go out because the 1200 amp/phase building breaker has > >>> tripped like a 12 gauge, followed a few milliseconds later by the > >>> realization this fix is going to need around $125,000 and at least > >>> two unscheduled quorums on the state legislature called. One to > >>> authorize the purchase, and when its been built and ready to ship, > >>> write the check. > >>> > >>> Yeah, broadcast power klystrons are that expensive. Thats why we > >>> don't use them anymore. > >>> > >>> > anyway please sing out with any feedback you have and > >>> > ideas. I would love to get some ideas here from those who have > >>> > done this all before. > >>> > > >>> > I am using a mesa 5i25 7i76 combo. > >>> > >>> Good combo, I'm using it twice myself. > >>> > >>> > And I have all sorts of contactors etc. > >>> > > >>> > Regards > >>> > > >>> > Andrew > >>> > > >>> > <https://www.avast.com/sig-email?utm_medium=email&utm_source=lin > >>> >k&utm_ campaign=sig-email&utm_content=webmail> Virus-free. > >>> > www.avast.com > >>> > <https://www.avast.com/sig-email?utm_medium=email&utm_source=lin > >>> >k&utm_ campaign=sig-email&utm_content=webmail> > >>> > <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > >>> > > >>> > _______________________________________________ > >>> > Emc-users mailing list > >>> > Emc-users@lists.sourceforge.net > >>> > https://lists.sourceforge.net/lists/listinfo/emc-users > >>> > >>> Cheers, Gene Heskett > >>> -- > >>> "There are four boxes to be used in defense of liberty: > >>> soap, ballot, jury, and ammo. Please use in that order." > >>> -Ed Howdershelt (Author) > >>> If we desire respect for the law, we must first make the law > >>> respectable. - Louis D. Brandeis > >>> Genes Web page <http://geneslinuxbox.net:6309/gene> > >>> > >>> > >>> _______________________________________________ > >>> Emc-users mailing list > >>> Emc-users@lists.sourceforge.net > >>> https://lists.sourceforge.net/lists/listinfo/emc-users > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users
Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
