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Posted by MaidsMoreton on May 4, 2008, 5:36 pm
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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,
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Posted by Tim Leech on May 4, 2008, 6:14 pm
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>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,
Obviously not a good thing if the flat way is holding the Vee apart,
so it seems like the right thing in theory. How would you propose to
doit? Scraping? Big surface grinder? anything else might be a bit too
brutal.
Have you checked that the ball bearing 'gibs' are adjusted up?
Tim
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Posted by Charles Ping on May 5, 2008, 4:34 am
Please log in for more thread options On Sun, 04 May 2008 23:14:07 +0100, Tim Leech
>
>>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,
>
>Obviously not a good thing if the flat way is holding the Vee apart,
>so it seems like the right thing in theory. How would you propose to
>doit? Scraping? Big surface grinder? anything else might be a bit too
>brutal.
>Have you checked that the ball bearing 'gibs' are adjusted up?
>
>Tim
You may want to ask in the Monarch forum on Practical Machinist.
Since the CVA is basically a developed Monarch 10ee copy there is
probably some experience worth tapping in there.
http://www.practicalmachinist.com/vb/index.php
Also on the Yahoo Monarch group there's a document detailing someones
rebuild that might be inspirational.
http://finance.groups.yahoo.com/group/Monarchlathe/?v=1&t=directory&ch=web&pub=groups&sec=dir&slk=17
Charles
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Posted by MaidsMoreton via ModelGeeks.co on May 5, 2008, 7:07 pm
Please log in for more thread options 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. I have not had it
running yet as I am doing some other work on it but it now feels rock solid
so I am hopeful. Thanks Tim for the encouragment and the advice on the
rollers, I will check them also.
I found some interesting stuff on Monarch lathes as suggested -especially
the guy with the "Wreck" who was totally rescraping all the ways but it
sounded a bit out of my league.
Lastly, for Mark, I have had my CVAs (a 1954 and a 1957) for about six years,
having bought them from a chap in the village. It has taken me until now to
make a converter and give them a proper try.
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.
Charles Ping wrote:
>>>Hello,
>>>I am in the process of doing up a CVA lathe. I noticed while doing a test
>[quoted text clipped - 18 lines]
>>
>>Tim
>
>You may want to ask in the Monarch forum on Practical Machinist.
>Since the CVA is basically a developed Monarch 10ee copy there is
>probably some experience worth tapping in there.
>http://www.practicalmachinist.com/vb/index.php
>
>Also on the Yahoo Monarch group there's a document detailing someones
>rebuild that might be inspirational.
>http://finance.groups.yahoo.com/group/Monarchlathe/?v=1&t=directory&ch=web&pub=groups&sec=dir&slk=17
>
>Charles
--
Message posted via ModelGeeks.com
http://www.modelgeeks.com/Uwe/Forums.aspx/models/200805/1
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Posted by Charles Ping on May 6, 2008, 2:09 am
Please log in for more thread options On Mon, 05 May 2008 23:07:01 GMT, "MaidsMoreton via ModelGeeks.com"
>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. I have not had it
>running yet as I am doing some other work on it but it now feels rock solid
>so I am hopeful. Thanks Tim for the encouragment and the advice on the
>rollers, I will check them also.
> I found some interesting stuff on Monarch lathes as suggested -especially
>the guy with the "Wreck" who was totally rescraping all the ways but it
>sounded a bit out of my league.
>Lastly, for Mark, I have had my CVAs (a 1954 and a 1957) for about six years,
>having bought them from a chap in the village. It has taken me until now to
>make a converter and give them a proper try.
>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.
>
>
Did you really use a file on the underside of the saddle?
Seems a tadge brutal.
Charles
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>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,