On Sunday 31 March 2019 16:36:58 hubert wrote: > Gene > > How many roller switches would you need. I have more than I need. > > Hubert
4 or so should get me going. PM me where I should send a 5$ bill. > > On 3/31/19 12:14 PM, Gene Heskett wrote: > > On Sunday 31 March 2019 11:07:51 TJoseph Powderly wrote: > >> hi gene > >> maybe redesign to drive past the switch > >> like you can brush a wall mounted light switch by swiping your hand > >> over the wall surface > >> rather than punching it :-) > >> ( try mounting so the direction of switch activation is 90 degress > >> to the joint motion ) > >> tomp > > > > I hadn't thought of that idea, mainly because that would put the > > mechanism out in the breeze and subject to damage, or maybe snagging > > a hose etc as it moves. Mounted so as to detect the touch of the two > > parts as it comes to the end of travel is quite appetizing in > > addition to being "in out of the weather" so to speak. Mounting a 90 > > degree angled and flexible lever for z would either project forward > > or sideways, and sideways would cost me x travel too. I'll have to > > go stand and stare at it some more & see what I can imagine AND > > make. I've already done some of that, and keep throwing it away for > > one reason or another. The best idea seems to be to make a spring > > loaded button pusher with 1/4" of give in the spring, but that > > sticks out. On both moving and stationary parts. Sliding a ramp over > > the top of the button equals wear on the plastic button. And > > complicated by the inability to get at it to drill & tap screw > > holes without a huge teardown. So whatever is going to have to be > > set in position and superglued to the epoxy paint on everything. > > Imagination will be made to work overtime for sure. Changing switch > > style to roller lever is looking like a possibility. Put a short tab > > of sheet alu to stick out of the gap and hit the roller might work, > > and that would put the switch body flat on the stationary part. They > > can stand some overtravel by flexing the lever. I have enough of > > those for homes, but not for limits too. And with no Radio Shacks > > left, China is the nearest vendor. 6 weeks. Humm, for x home at > > left, peel my cable back out of the gantry cable chain early. Y home > > never gets to the gantry cable, only thru the new cambric coming > > down from the electronics shelf. Like I said, stand and stare at it. > > And let my imagination out without a chaperone... > > > > Thanks TomP. > > > >> On Sun, Mar 31, 2019 at 9:03 PM Gene Heskett <ghesk...@shentel.net> > > > > wrote: > >>> Greetings everybody; > >>> > >>> I think I've got the coolant pump starting problem fixed. Ignore > >>> that faint knocking sound. > >>> > >>> Now I would like to use a teeny little pushbutton (6x6x2.5mm tall) > >>> between two solid parts of this machine for home and potentially > >>> as limit switches. > >>> > >>> However the amount of available overtravel after the switch has > >>> clicked is quite limited unless this switch is mounted on > >>> something crushable so that the getting stopped overtravel does > >>> not crush the switch like a Coors can. > >>> > >>> Is there a way to determine how much overtravel vs approach speeds > >>> is occuring? > >>> > >>> I ask because a wide open x or y move can do around 220 ipm on > >>> this machine, and that stopping distance is not an ignoreable > >>> distance when the switch only has maybe .010" of overtravel after > >>> its clicked. > >>> > >>> So I first would like to determine the maximum safe SEARCH_VEL I > >>> can use for homeing, then from that, be able to set MAX and MIN > >>> LIMITS far enough away from the crash stop to provide crash > >>> protection in the space between the LIMIT set in the ini file, or > >>> how much crush room I have to build into the switch mount? > >>> > >>> Also, in attempting to minimize this stopping distance, what or > >>> how can one detect a motor step slip if the ACCEL's are stopping > >>> the motor faster than it can stop? Hopefully without pounding a > >>> $90 dial into junk. > >>> > >>> Thanks all; > >>> > >>> 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) > >>> 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 > > _______________________________________________ > 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) 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
