On Sunday 11 September 2016 13:05:59 Andy Pugh wrote: > > On 11 Sep 2016, at 17:13, Gene Heskett <ghesk...@shentel.net> wrote: > > > > that would protect > > the hall device should temp effects result in the gear actually > > touching the alu of the mount > > How hot do you expect the gear to get to expand by 3mm?
Chuckle. I did find out how hot my piece of alu could get if it rubs, burn you fingers hot! This occurred after I thought it had clearance but as I tightened down the mount screw it tipped fwd about 30 thou and did a nice job of polishing it with the gears teeth. So I undertook to sand it where the cast grain had marked it, and keep sanding until it still cleared when tightened. Then I washed up the right rim of the gear, and ground about 3/8" of steel screw square, and slightly narrower than a tooth, gave it a coat of Go-2 (aka goop) and clamped it in place with the top flush with a tooth, and a few thou narrower than a tooth so (hopefully) the backgear will not knock it loose. That was a good place to quit & let the Go-2 cure till tomorrow. I am down to about 1.5 usable 1/4" SC end mills, and found some on ebay, and I getting low on alu scraps & found a 20 lb kit of all 7078-T6 & bought that too. Ack the shipping notices I may as well loaf till about Wednesday, which should start to trickle in the rest of the stuff I need for the Z screw. Some rubber bellows type boots so I'll know what size of cups I need to make to fit those. Spacers, etc will have to wait till I've found a suitable piece to make a new table insert for my bandsaw. That was never table surface high, and it let a small piece tip into the blade which crushed the plastic OEM insert, and the piece visited all 4 walls of my little shop building but couldn't be found. So I closed it up for the night, and when I pulled the door open the next morning it rolled out onto the shops front deck. Go figure. ;-) BJ is sending me enough stuff to rebuild the toy lathe, so eventually I hope I can get back to making stuff for the Sheldon on it. And I finally figured out what that 6" cover on the left face of the Sheldon's stand is for. The only way you can change the 2 upper drive belts is to take off the belt on the 4 step pulleys, remove the upper4 step pulley, undo the screws holding the double pulley, then drive the shaft out thru that hole far enough to uncouple the dual pulley, take the bearing caps off both ends of the spindle and lift it out, belts, pulley, and all. I might have to rig a sky hook for that. Belts run with a rumble, backing damage I expect as they were loose enough the backs of the belts have worn a grove in the casting lip where the bed and left foot meet. Just one more thing I'll have to do at some point. :( By that time, another of those 1kw induction modules should arrive. 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
