Sorry - meant to post https://photos.app.goo.gl/yBNmiD9rRkPCoNgJ8
On Mon, Mar 21, 2022 at 7:19 AM Sam Sokolik <samco...@gmail.com> 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 <ghesk...@shentel.net> 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:ghesk...@shentel.net] >> > > 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 >> > > Emc-users@lists.sourceforge.net >> > > 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 >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
