Sam, have you had to soften the final portion of the ballscrew to machine that thread? I've never done it and the ones I'm mounting in the router are fixed (rotating nut).
El lun, 21 mar 2022 a las 10:15, Sam Sokolik (<[email protected]>) escribió: > Sorry - meant to post > https://photos.app.goo.gl/yBNmiD9rRkPCoNgJ8 > > On Mon, Mar 21, 2022 at 7:19 AM Sam Sokolik <[email protected]> wrote: > > > Dad ground the ball screw nut.. everything fits nicely under the cross > > slide it seems.. Found a bit of aluminium to make a simple bearing block > > for 2 angular contact bearings.. > > > > https://photos.app.goo.gl/NcW1fxrBGBgXH1SPA > > https://photos.app.goo.gl/jWwKR5Fvz9ae4bbR7 > > https://photos.app.goo.gl/jWwKR5Fvz9ae4bbR7 > > > > On Sun, Mar 20, 2022 at 5:56 PM gene heskett <[email protected]> > wrote: > > > >> On Sunday, 20 March 2022 18:07:01 EDT John Dammeyer wrote: > >> > Gene, > >> > The replacement ball bearing fan isn't on the bed fan duct but cools > >> > the top part of the hot end where the filament enters the PTFE lined > >> > feed pipe. > >> > > >> Ah, PTFE lined hot end. Needs tubing replaced as even at 200c nozzle > >> temps, the stuff eventually goes away or leaks badly. Feed it PETG at > >> 240C, goes away in 2 days. All metal hot ends are better, titainium heat > >> breaks even better. Better yet I suspect is the copperhead copper/ > >> titainium combo but like the PCD nozzle, bring real money. > >> > >> > Problem solved which the new blower duct, now not aimed at the hot > end, > >> > did not completely fix. > >> > >> should be aimed at or just below the nozzle tip. > >> > > >> > Wrapped hot end block in insulating paper and Krylon tape. Now nice > >> > flat curves and no drop in temperature even with 98% bed fan speed. > >> > > >> > John > >> > > >> > > -----Original Message----- > >> > > From: gene heskett [mailto:[email protected]] > >> > > Sent: March-20-22 2:50 PM > >> > > To: Enhanced Machine Controller (EMC) > >> > > Subject: Re: [Emc-users] Because I can't seem to finish anything... > >> > > Nebel lathe conversion.> > >> > > On Sunday, 20 March 2022 16:46:17 EDT John Dammeyer wrote: > >> > > > Story of my life. Fan failed on 3D printer. Repaired feed tube > >> > > > and > >> > > > replaced with ball bearing fan I had from power supply > >> > > > manufacturing > >> > > > inventory. Almost 1 week later still not working quite the way > it > >> > > > was and the way I want. John > >> > > > >> > > ball bearing fans start easier, leads to over cooling the early > >> > > layers. Change the min speed so its stopped for the 1st layer like > >> > > it used to be at 25% power. Sleeve bearing fans often don't start at > >> > > all till the mid 30% range. > >> > > > >> > > Try zero for the first layer or even as high as the third layer > >> > > before > >> > > the fan actually starts. I have a ball bearing fan on my BIQU BX and > >> > > it runs plenty fast enough at 30% of max in cura for PETG which > >> > > needs far less cooling than PLA. I don't mess with PLA at all, too > >> > > brittle. > >> > > > >> > > I've also put a diamonback .4mm PCD nozzle in mine so I can use the > >> > > carbon fiber filled PETG but haven't yet seen the need for its > >> > > improved strength. I'm running the nozzle at 252C and the bed at 90C > >> > > and my printed air manifold is air tight. Bed adhesion is only a > >> > > problem getting stuff loose. Its almost too good. If the nozzle is > >> > > slobbering, check how tight it is, then reduce the flow 2% at a time > >> > > to stop the overflow, this PCD nozzle conducts heat into the > >> > > filament better than brass, melting it better which can increase the > >> > > flow. At 245C the part will not be airtight if you need that. At > >> > > 252C the part gets noticably glossier because its more liquid and > >> > > bonds well to the next layer down before it cools and solidify's. > >> > > > >> > > Take care and stay well John. And my teeny version to be used as the > >> > > B > >> > > axis driver on my 6040 mill, the one that costs around a tenner to > >> > > make, seems to be pretty solid, got several hundred hours on it now > >> > > but it probably going to get another 200 running a hard maple stick > >> > > for a woodworkers leg vise screw. I've got to make an idler yet to > >> > > tighten the belt as that is the only backlash it it. > >> > > > >> > > 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, 1940) > >> > > If we desire respect for the law, we must first make the law > >> > > respectable.> > >> > > - Louis D. Brandeis > >> > > > >> > > _______________________________________________ > >> > > 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, 1940) > >> If we desire respect for the law, we must first make the law > respectable. > >> - Louis D. Brandeis > >> > >> > >> > >> > >> > >> _______________________________________________ > >> Emc-users mailing list > >> [email protected] > >> https://lists.sourceforge.net/lists/listinfo/emc-users > >> > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
