sorry - It is actually this video 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_ClassicLadder >> >> 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=link&utm_ >>> >campaign=sig-email&utm_content=webmail> Virus-free. >>> > www.avast.com >>> > <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&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
