It is my understanding that ball screws are case hardened so grind to
get under the case and
then things get easy.
Interesting and good job on the ball nut. !!
In line with the nebel prize: the machine should be a very light grey
and your hand should pass thru it easily. ;-) Nebel = fog.
Dave
On 3/21/22 7:46 AM, gene heskett wrote:
On Monday, 21 March 2022 08:19:14 EDT Sam Sokolik 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
Unforch Sam, no access
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
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Emc-users@lists.sourceforge.net
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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
.
Cheers, Gene Heskett.
_______________________________________________
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Emc-users@lists.sourceforge.net
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