Okay, so, my questions was more.. what is the whole gizmo FOR? Not just the specifics of that one picture. I see a few micro switches with a cam, and motor and such.. I was trying to figure out what the heck it all was and did...
On 10/13/2015 10:50 PM, Gene Heskett wrote: > On Tuesday 13 October 2015 13:56:41 Billy Huddleston wrote: > >> I've got to ask.. What exactly is this and what is it for? >> >> http://geneslinuxbox.net:6309/gene/GO704-pix/gauge-drive-sliding-coupl >> ing.jpg >> >> ?? > Shade tree engineering, a long and proud history for an old Iowa farm kid > like me. > > Reason? The frame of that, salvaged from an old paper shredder, > precludes putting the axis of that gear dead inline with the piano hinge > the locator bar swings on. And because I have a strong o-ring across a > couple screws on the back of the hinge, pulling the end play out of the > hinge with about ba 10 lb pull, I found that 2 things were happening. > > 1, the plastic hose was pushing against o-rings pull and screwing up the > repeatability of the x asis detection. Or 2, it was pulling itself off > the gear when the jig was open. So I milled a piece of 1/2" copper pipe > about 3/4" long with 8 slots at 45 degree intervals, making the slots > about 90 thou wide & .3" deep, as close as I can get to the 3 jaw on my > cheap rotary table without the side of the spindle dragging on a chuck > jaw. Then bent them inward to engage the gullys of the 8 tooth gear. > It freely slides endways on the gear as it opens and closes the locator > bar. Tied via hal to the "mist" button on the left panel of the axis > gui I use, feeding the 5i25's P2 pin 17. > > By the same token, a charge pump is running at 1/2 servo-thread rate, and > the "flood" checkbox enables it via an and2 to drive a pump detector, > watching the 5i25's P2-pin 16, which in turn turns on a transistor and > that pulls in a DPDT icecube relay wired in parallel to start and stop > the vacuum. The added complexity of using the and2 in the hal file > allows me to add more stuff to the mix. > > But I haven't figured out how to get it to select a good board off the > pile, take it over to the chop saw, cut it to length, and bring it back > & mount it on the mill. Yet... ;-] First off, no robot I've seen > walking around could negotiate that packrat built midden heap I loosely > call a garage. :-[ > >> On 10/13/2015 09:25 AM, Gene Heskett wrote: >>> On Tuesday 13 October 2015 06:43:51 John Thornton wrote: >>>> You must be a fan of Rube Goldberg! I love the gauge thingy... not >>>> being an electronics genius like you I would have drilled the >>>> bottom of the holding thingy for some pins that fit the slots in >>>> the table to register the fixture in the Y axis >>> I glued some legs on the ends that fit the T slots. I miss set them, >>> probably moved on the glue film when I tightened the screw so the >>> runout in the x direction is about 3 thou. They also fit the T-slot >>> too tight so it should be fixable. I just need to find my round >>> tuit. But I'd have to put a dial on the head and sweep the x, >>> measuring the closed bar, to figure out which leg to sand on. Until >>> then, its close enough for wood. >>> >>>> then put a dowel in the spindle and >>>> move to - half the dowel diameter and slide the fixture up to the >>>> dowel. Then I would make a template like a L with pin holes and put >>>> that into the fixture and slide the part up to the L to set the X >>>> and Y of the part the same place every time. The remove the setup >>>> guide and machine away. But your way looks more fun. >>> The x stopper is on the left, about 3/8" high, screwed and glued, so >>> it doesn't move. The end of it adjacent to a finger on the board >>> has of course been machined away by the mill coming down the side of >>> the board, shaving it a thou or so. But I felt I had to make it >>> gcode controllable as I was losing track of the number of times I >>> had to reach over an flip it manually to keep the bar from being >>> carved up as the head was descending. Walking to the far side of >>> the machine and bending over to turn on the vacuum was also a PIMB*. >>> :( >>> >>> Because this machine is more rigid, I've had to adjust the mills >>> diameter in the software to re-establish the glue line fit. Or this >>> mill has less x backlash that the small one with its teeny ball >>> screws. Needs bigger balls in the x screw, its about 1.6 thou. On >>> the small mill, I had to tell the software the mill was only .243 in >>> diameter, effectively making it cut deeper. On this one the same >>> glue fit is around .247" >>> >>> Anyway, the target is to set and clamp the board, sit down and hit r >>> until its time to change the tool or turn the board over. Rinse & >>> repeat for the other end of the board, then get some exercise >>> cutting the next board. And because the roundover bit is about 3/4" >>> shorter than the mill, I either need to fit collars to both bits, or >>> buy another R8-ER20 adaptor so the whole thing gets changed when its >>> tool changing time and I can know the stickout difference. >>> Presently I have to probe both tools. >>> >>> In either case, my spindle pin brake needs something to hold it in >>> while my hand is busy catching the tool or adapter. I made it with a >>> retractor spring as its not nice on things to try & start the >>> spindle when its locked. >>> >>> *PIMB pain in my back. >>> >>> Thanks John. >>> >>> Cheers, Gene Heskett > > Cheers, Gene Heskett -- Billy Huddleston Inner Vision *William Huddleston Inner Vision Development Corp* Office: 865.560.2752 Fax: 865.560.2703 http://www.ivdc.com *Development and Consulting... 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