Would a better solution ( or an as_well_as solution) be to have two saddles
spaced widely apart?
Or maybe we should all just save up and buy a Tormach. Slant-bed doesn't solve
the basic problem, but its a good way to go.
Marcus
On 29 Sep 2014, at 03:35, Gene Heskett wrote:
On Sunday 28
I would just think of the bed as a casting, discard the rubbish
sitting on it, add a couple of rails and slides now you have something
than can carry a saddle without tightening and play.
Dave Caroline
On 29/09/2014, Marcus Bowman marcus.bow...@visible.eclipse.co.uk wrote:
Would a better
On 9/28/2014 8:35 PM, Gene Heskett wrote:
I too have a similar problem with my toy 7x12. And because the gibs are a
cast iron bitch to adjust, I've considered pulling the no longer used
rack, and adding an at least as long as the H wings bar front and back and
putting small ball bearings on
On 9/29/2014 12:45 AM, Marcus Bowman wrote:
Would a better solution ( or an as_well_as solution) be to have two saddles
spaced widely apart?
Or maybe we should all just save up and buy a Tormach. Slant-bed doesn't
solve the basic problem, but its a good way to go.
Tormach lathe? The little
On 9/28/2014 8:35 PM, Gene Heskett wrote:
I too have a similar problem with my toy 7x12. And because the gibs are a
cast iron bitch to adjust, I've considered pulling the no longer used
rack, and adding an at least as long as the H wings bar front and back and
putting small ball bearings on
No; I saw that lathe-on-a-mill-bed trick, and it was interesting, but better
done using a proper big 4th axis.
No; I meant this one:
http://www.tormach.com/product_lathe.html
Rumour has it that the castings are made in China, and are readily available,
but its the detail and the assembly that
On Sun, Sep 28, 2014 at 9:54 PM, andy pugh bodge...@gmail.com wrote:
My lathe is rubbish. That's just a fact. Luckily the lathe is a rather
clever mechanism and even a bad one can make decent parts due to
fundamental precepts of geometry.
What I noticed today was that the saddle can twist. I
On 29 September 2014 03:35, Gene Heskett ghesk...@wdtv.com wrote:
Apart from the extra cost, what is the drawback?
The requirement for a totally backlashless coupling between the screws?
I would imagine that a symmetrical belt drive from a single motor, or
two motors (and square it in
On 29 September 2014 08:14, Dave Caroline dave.thearchiv...@gmail.com wrote:
I would just think of the bed as a casting, discard the rubbish
sitting on it, add a couple of rails and slides now you have something
than can carry a saddle without tightening and play.
A decent plan, apart from the
On 29 September 2014 10:47, andy pugh bodge...@gmail.com wrote:
Bolton has an 11x28 (23 between centers) with a variable speed motor that
sells bare for about $3000 USD. The B290VF. Marked down some now. $2721
w/6 4 jaw backplate. What can this group say about it? Good or bad?
At that
On Monday 29 September 2014 05:47:49 andy pugh did opine
And Gene did reply:
On 29 September 2014 03:35, Gene Heskett ghesk...@wdtv.com wrote:
Apart from the extra cost, what is the drawback?
The requirement for a totally backlashless coupling between the
screws?
I would imagine that
On Monday 29 September 2014 10:42:22 andy pugh did opine
And Gene did reply:
On 29 September 2014 10:47, andy pugh bodge...@gmail.com wrote:
Bolton has an 11x28 (23 between centers) with a variable speed motor
that sells bare for about $3000 USD. The B290VF. Marked down some
now. $2721 w/6
This is a nice idea. Start off with a 1m3cast block, and you build a fairly
simple two axis platform. If you keep it generic it it can be used for all
sorts of things.
You don't get to see too much of the 'lathe' but it's obvious enough;
https://www.youtube.com/watch?v=fML6VN88U_M
Regards
On 29 September 2014 17:07, Eric Keller eekel...@psu.edu wrote:
The lathe is a Nanotech. There are a lot of reasons why it is a half
million $ machine, but I'm not sure the base is one of those reasons.
I wonder what the logic is behind moving the head rather than the tool
for the Z axis?
--
we do it the other way around now that we have a c-axis. Back when the
video was made, it was easier to do it the way shown in the video. That
spindle is very heavy. We swap z axis spindles fairly frequently.
On Mon, Sep 29, 2014 at 12:14 PM, andy pugh bodge...@gmail.com wrote:
On 29
that's our lab. We use the enclosure nowadays :) Ted survived and has a
real job now.
The lathe is a Nanotech. There are a lot of reasons why it is a half
million $ machine, but I'm not sure the base is one of those reasons. The
air bearing spindle he is using is instrumented with 4
Yes, I appreciate the precision, I'm just saying it demonstrates digressing
from the traditional concept of what people think of as a lathe. At the end
of the day it's a spindle, X and Z, whether it's mm or femto resolution.
And the form factor is still easier to do starting off with a cast block
That configuration gets used a lot in precision work. Another option is the
base from a Moore coordinate measuring machine. You can see a lathe built
with one of these machines in this vid:
http://youtu.be/TFmIuibVn3k?t=20s
Those bases go for about $3k or so. Or free, depending on if you are in
On Monday 29 September 2014 11:22:46 Gene Heskett did opine
And Gene did reply:
On Monday 29 September 2014 10:42:22 andy pugh did opine
And Gene did reply:
On 29 September 2014 10:47, andy pugh bodge...@gmail.com wrote:
Bolton has an 11x28 (23 between centers) with a variable speed
My lathe is rubbish. That's just a fact. Luckily the lathe is a rather
clever mechanism and even a bad one can make decent parts due to
fundamental precepts of geometry.
What I noticed today was that the saddle can twist. I think I have the
rear gibb a bit tight for anywhere more than 5 from the
On 9/28/2014 7:54 PM, andy pugh wrote:
So, I started thinking, and it occurred to me that whilst the
traditional lathe solution to the fact that the leadscrew is offset
from the point of action of the tool is to have a saddle with long
wings, you could have a short saddle that only controls
On Sunday 28 September 2014 21:54:25 andy pugh did opine
And Gene did reply:
My lathe is rubbish. That's just a fact. Luckily the lathe is a rather
clever mechanism and even a bad one can make decent parts due to
fundamental precepts of geometry.
What I noticed today was that the saddle can
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