On 2010-06-26, James Waldby wrote:
On Fri, 25 Jun 2010 23:50:05 +0000, DoN. Nichols wrote:
On 2010-06-25, James Waldby wrote:
...
Reverse rotation is a standard feature on Sieg 7x10/12/14 minilathes.
In first picture* at http://www.mini-lathe.com/Features/features.htm
Hmm ... one minor problems with the URL above.
You left out the second "Mini_Lathe" in the url. It should be
like this:
http://www.mini-lathe.com/Mini_lathe/Features/features.htm
I inserted a reference to http://www.mini-lathe.com/ first, and evidently
didn't cut and paste properly when I changed it to refer to features page.
Cut and paste can be tricky -- especially if the system plays
with case. :-)
[ ... ]
Is the gearing in that all metal, or are the gears in part
plastic?
The leadscrew drive train has plastic gears, driven by a steel ring gear on
the spindle end. See pictures at next two links, from pages at latter two.
http://www.mini-lathe.com/mini_lathe/features/Gears_y.jpg
http://www.mini-lathe.com/mini_lathe/reviews/homier2/gears.jpg
http://www.mini-lathe.com/mini_lathe/features/features_2.htm
http://www.mini-lathe.com/mini_lathe/reviews/homier2/homier.htm
O.K. Useful information there.
The spindle drive train also has some plastic gears in it;
Ouch! The photos also tell me that there is no way that
Searcher7 could put in a spindle which would accept a 5C collet closer. :-)
The gears under the spindle would have to be scaled up too,
which would move the spindle higher, requiring a riser block on the
tailstock to move it to the same height, and the carriage would require
a riser block on the compound, making it that much more flexible. :-)
eg see
http://www.thms.tedatum.com/shop22.html which has numerous pictures
in a description of replacing the plastic gears with steel gears from
https://thehobbyistmachinestore.com/store/, a place that also has
a steel "Mini-Mill R8 Gear Set" for about $50, should Searcher7 need
to replace or fix a gear in a drill/mill of that sort.
Great! That will hopefully be useful for him.
Awkward location for those levers.
** http://www.mini-lathe.com/Mini_lathe/features/Levers_y.jpg
Yes, they are on the back of the lathe. Besides that, the leadscrew
direction lever is difficult to operate properly because of shallow
detents in the pot metal case, and overly stiff spring. However, most
projects don't require frequent shifting of these levers.
That depends, of course. On my 12x24" Clausing, which has
separate power feed from the threading leadscrew (derived from a keyway
milled the length of the leadscrew turning a worm gear in the carriage
apron) the tumbler needs to be set into reverse for feed towards the
headstock, and when I switch to cross-feed, it feeds out with the same
setting. This is nice when turning to a shoulder followed by facing the
shoulder (just switch from longitudinal to cross-feed), but when facing
towards center, or parting off, I need to switch the tumbler into
forward -- as well as for normal threading. So -- I wind up switching it
fairly often in making a single part.
Looking at the motor control panel, I see a screw with a stack
of nuts at the upper left -- looking sort of like a terminal post for
multiple ring terminals to attach to -- perhaps as safety grounds?
No, that's a change the page author made, to store several 10mm nuts.
http://www.mini-lathe.com/Mini_lathe/Modifications/modifications.htm#nut_keeper
O.K. I see that they are needed for the chuck mounting -- and
hopefully it is tall enough to store them *all* when a collet nosepiece
is installed.
Thanks,
DoN.
--
Email: | Voice (all times): (703) 938-4564
(too) near Washington D.C. |
http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---