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Posted by mark@ems-fife.co.uk on May 6, 2008, 3:13 am
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> Thank you for the replies,
> I have carefully attacked the underneath of the saddle with a file. The metal
> seemed quite soft and I just kept removihg the high spots.
Sounds a bit savage,but everyone to their own.
I would have stripped the saddle,including removing the rollers at the
back,wipers etc.Wash down bed and underside of saddle.Lay the saddle
back on the shears at the chuck end,blue the bed at the tailstock end
and slide the saddle carefully along to the tailstock end.Lift the
saddle of and all the high spots should be marked.
It`s strange that the saddle is sitting on the flat and not touching
the vee as,even with wear it should all go down together and it would
be impossible for the vee to wear if the flat didn`t.
I`m wondering if it`s the original saddle or if the bed has been
reground,badly.
However what you`re doing won`t cause you problems from the point of
view that the metal has to come off to get the saddle back on the
vee.It`s just that most people do it with a scraper. :-)
The thing to watch is not to lose the squareness of the cross slide to
the spindle,and that shouldn`t happen if you don`t touch the vees,a
drop in height is not going to cause problems.
The other thing to check after you`re happy with the fitting of the
saddle is the alignment of the half nuts on the leadscrew.
Mark.
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Posted by Tim Leech on May 6, 2008, 3:56 am
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On Tue, 6 May 2008 00:13:25 -0700 (PDT), "mark@ems-fife.co.uk"
>It`s strange that the saddle is sitting on the flat and not touching
>the vee as,even with wear it should all go down together and it would
>be impossible for the vee to wear if the flat didn`t.
>I`m wondering if it`s the original saddle or if the bed has been
>reground,badly.
There'll tend to me more wear on the rear face of the vee, I can
visualise that taking the brunt of any wear & especially so if the
flat way is well lubed & the vee is a bit dry. Is oil getting freely
to all intended points?
>However what you`re doing won`t cause you problems from the point of
>view that the metal has to come off to get the saddle back on the
>vee.It`s just that most people do it with a scraper. :-)
Think of a file as hundreds of tiny scrapers <g>
Tim
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Posted by Richard on May 8, 2008, 4:20 pm
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>I think I was watching the same lathe on Ebay -all the bids were removed back
>to its £9.99 starting price and then it vanished - strange!
>Once again many thanks, and I hope you all find this as I'm not totally sure
>how to reply -my first time.
I was watching it too, but rather wilted at the thought of trying to
explain yet another chunk of cast iron to SWMBO having only just last
week acquired an imacculate Smart & Brown 1024. I was a bit relieved
when it disappeared ;-}
Richard
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Posted by mark@ems-fife.co.uk on May 5, 2008, 11:22 am
Please log in for more thread options > Hello,
> I am in the process of doing up a CVA lathe. I noticed while doing a test
> turn (about 24 inches long) that the result was not regular. Having removed
> the apron I found that the saddle could be twisted slightly and that it does
> not rest correctly on the raised vee. I used a marker pen to put lines on
> the bedways then slid the saddle by hand to find high spots. It seems to me
> that there is some wear to the saddle where it rests on the vee, especially
> at the ends.Also, the next slideway (ie the flat one 2 inches from the vee)
> is holding the vee slightly apart.
> Has anyone encounted this or do you have any advice? I am considering
> removing some metal under the saddle where it contacts the flat slideway. Is
> this a good idea?
> Many thanks.
> A CVA appreciater,
Is this the machine that was on Ebay recently but got pulled before
the end of the auction?
Mark.
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> I have carefully attacked the underneath of the saddle with a file. The metal
> seemed quite soft and I just kept removihg the high spots.