On Thursday 30 July 2015 08:50:22 John Alexander Stewart wrote: > Gene; > > The "no longer required" manual locks reminder gives me some > additional > > > freedom as that had not occured to me. What had occured was how do > > I keep them from being demolished if not correctly positioned? > > > > So that opens up additional possibilities, thanks John. > > The X axis on mine; I retain one of the round table stops in that > front of table dovetail that you mention in a previous email.
I can see that in the pix. > The microswitch is positioned on a front plate, spacers and M6 bolts > to pre-existing holes. Microswitch is horizontal so that (in theory, > anyway) the table stop will not "crash" into and destroy the switch. I am assuming the "knob" can ride over and pass by the switch w/o damaging it. That would seem to be a requirment so that full use of the table can be had. > I removed the front measuring tape, and on my front plate, I machined > up some long rectangular bars from scrap that are bolted to the front > plate, but ride in the slot where the measuring tape was; the fit is > pretty close, so the chance of swarf getting onto the microswitch is > pretty small. Great idea. > The Y axis - I machined a flat on the base casting, with a bunch of > tapped holes, so the Y axis switch base is just a bit of angle. Again, > an existing locking handle hole on the saddle casting is used for the > trigger. The Y axis switch is covered with a metal cover machined from > something from my scrap box (an old hammond box) such that the > microswitch is covered; the base angle under the roller machined away > such that if any swarf does indeed find its way in, hopefully gravity > will help it find its way out. It is also under the table, so I don't > expect too much swarf to get in. Only that which we blow in with an air hose while clearing the tabletop so a vice or rotary sits clean & level. :) > The only issue that I have with the Y is that there is a potential > interference with the right hand bracket for the X axis; one of these > days I'll take a file to the bracket so that I can get the full table > travel without the possibility of interference. I don't recall that on mine, the X motor is on the left end of the table. Only the ball screws thrust bearing is on the right and that isn't a huge hangy down. I am thinking of a switch laying horizontally, roller to face left, with a round headed screw in a lock lever hole that will trigger it, but ride right on by in normal operation. There should be room enough under the X that the switch can be mounted under the lip of a piece of 3/4" x 1/16th alu angle to servo as a swarf "roof" Far enough fwd that it should clear the X thrust bearing bulge. Homing Z up out of the way seems like it ought to be #0 in the HOME_SEQUENCE. At one point while working on the spindle encoder I needed to drill & tap some 3mm holes & had to invent a long handled tap that I could work right beside the spindle motor, so I drove the square end of the tap into a 12" piece of a suitable sized brass pipe from the model shop. Worked a treat. Its going to be stuck there till whenever as its handier than a button on the outhouse door to just chuck it up in a 20 volt drill. I think it will get used several times in mounting all this. Some good ideas are materializing here John, thanks. I had taken a nap after the earlier postings, and just woke up again. :) Someones Z stuff on the post will be first, so I can code it it order in the hal & ini files. X is in plain sight & last. Off to the shop & the toy mill to make some of this. No AC in the shop & its already right at 80F locally, with humidity to match. I call that "Mugly out". Thanks. > Hope this helps - John. > ---------------------------------------------------------------------- >-------- _______________________________________________ > Emc-users mailing list > [email protected] > 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
