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 -- "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
