Rather a cute idea. :-)
So taking it a step further ... use a double column of CMU for the
headstock and a single column to support the tailstock.
Epoxy the CMU to make a good column but don't epoxy to the floor. Use
a rod end or automotive ball and socket to relieve stress on the
tailstock.
Dave
I have to be very careful or I learn something every day.
On 10/04/2017 08:28 PM, John Bald wrote:
It does seem a lot simpler now...assuming I understand the whole idea.
So the only difference in the stand itself is the single contact point
on the tailstock end? There is nothing different on the headstock end
then, correct?
I like your idea about using the Chevy truck upper ball joint in my
design Gene. Found a new on one eBay for about $10 . Do you think 24"
depth will be stable enough or should it be deeper? Not planning to
bolt it to the floor
Sent with AquaMail for Android
http://www.aqua-mail.com
On October 4, 2017 10:37:11 AM Gene Heskett <ghesk...@shentel.net> wrote:
On Wednesday 04 October 2017 05:43:19 andy pugh wrote:
On 4 October 2017 at 02:32, John Bald <robotwiz...@att.net> wrote:
> Has anyone built or familiar with the "spanning beam" or "torsional"
> beam lathe stand?
It seems to be giving a fancy name to a simple idea.
I would imagine that a single pin joint at the tailstock end would
isolate the machine from the floor even better.
I'll second that thought Andy. My nearly 70 yo Sheldon has a spring
loaded ball and socket joint the right end of the bed sits on. So the
right bed foot can be off several degrees from level w/o effecting any
twist in the bed. If thats a problem, I see zero reason a chevy light
truck ball joint couldn't be fitted to carry the load, and isolate
things from a poorly poured floor. I put 2 of them out in the weather 25
years ago as the pivot points for an az-el satellite dish mount I made
with motors and a 2 axis controller. The only mistake I made was
inadequate weather protection for the azimuth drive jack, which lays
horizontal, its filled itself with rainwater, which in turn has frozen
and destroyed it several times. The first k band dish we had, its still
a 1/4 m.o.a. rifle barrel, way better that a $180k 7 meter dish from
scientific-atlanta.
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>
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
------------------------------------------------------------------------------
Check out the vibrant tech community on one of the world's most
engaging tech sites, Slashdot.org! http://sdm.link/slashdot
_______________________________________________
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
