Granite Mashines
Posted by
PMeinhard@a...
on 2000-11-30 12:17:12 UTC
Hi
A Engrving mashine from LANG , we have in the company I work in, gave me the
Idea to built a mill from Granite. Bought (and let cut) the Stone by a
company producing window sills etc. The granite-costs for my mashine (travel
480X460X190mm) were 700 DM (300 US$) They were not able to cut the granite
more exact the 1mm. So I bolted all together with 8mm screws, put it on a
measuring-mashine and adjusted everything . After that I put adhesiv tape
over all the caps and filled them with epoxyd.
Most work was to do all the drilling . (slowly with sharp carbide drills,
sharpening them every 5 holes). In those holes I glued brass thread-inleds
with epoxyd. (round about 60 holes). For the linear bearings I mounted first
an steelrod on the granite and grindet it on a big grinding mashine.
the mill is good for cutting brass, aluminium titanium an steel with max .
6mm cutters .
First thing I was milling was a 100mm circle and a cross with 6mm cutter in
aluminium.
measured that on the "Zeiss" there was a "circle-error " of 0.02 mm and an
angular error of 0.003 degrees.
I attatched a JPG to this file (sorry, could not get it up to egroups " User
Identification failed"
On my new mill i did one axis in "polymer-concret" It works fine, but it is
expensive, stinking and everything has to fit at once and You need to
include some Irons in Your form ,for later mashining and bolting the
bearrings etc. on it. The rest of that mashine made by welding laser-burned
10mm steel-plates together (much easier to do)
Excuse my bad english.
Regards
Peter
[Non-text portions of this message have been removed]
A Engrving mashine from LANG , we have in the company I work in, gave me the
Idea to built a mill from Granite. Bought (and let cut) the Stone by a
company producing window sills etc. The granite-costs for my mashine (travel
480X460X190mm) were 700 DM (300 US$) They were not able to cut the granite
more exact the 1mm. So I bolted all together with 8mm screws, put it on a
measuring-mashine and adjusted everything . After that I put adhesiv tape
over all the caps and filled them with epoxyd.
Most work was to do all the drilling . (slowly with sharp carbide drills,
sharpening them every 5 holes). In those holes I glued brass thread-inleds
with epoxyd. (round about 60 holes). For the linear bearings I mounted first
an steelrod on the granite and grindet it on a big grinding mashine.
the mill is good for cutting brass, aluminium titanium an steel with max .
6mm cutters .
First thing I was milling was a 100mm circle and a cross with 6mm cutter in
aluminium.
measured that on the "Zeiss" there was a "circle-error " of 0.02 mm and an
angular error of 0.003 degrees.
I attatched a JPG to this file (sorry, could not get it up to egroups " User
Identification failed"
On my new mill i did one axis in "polymer-concret" It works fine, but it is
expensive, stinking and everything has to fit at once and You need to
include some Irons in Your form ,for later mashining and bolting the
bearrings etc. on it. The rest of that mashine made by welding laser-burned
10mm steel-plates together (much easier to do)
Excuse my bad english.
Regards
Peter
[Non-text portions of this message have been removed]