Sieg C0 set up

[John A Cole 1Participant @johnacole1]

I've just bought a Sieg micro/baby lathe and am degreasing it and looking to set up the movement on the bed way. The rear part of the saddle seems to have quite a bit of movement on it, if pressure applied to the saddle,oil bubbles out from the gap which appears. Does this mean I need to shim the press plate so it moves fully tightened without the rocking I get from it now?

[John A Cole 1Participant @johnacole1]

[Neil WyattModerator @neilwyatt]

A while since I saw a C0 but i think its arranged like the larger SEIG lathes.

Possibly not, normal turning forces tend to press down the rear of the saddle, and on an inverted v bed it doesn't play a part in guiding so it doesn't need to be as finely adjusted as the front.

There should be an adjustable plate under the rear of the saddle which should be set so it is held securely but moves freely .

I'm sure someone will be along to explain I am wrong in a minute…

Neil

[John A Cole 1Participant @johnacole1]

Thanks Neil. Hmm…….. Not many comments. I'll keep cleaning it and when my shim material turns up adjust the saddle nut and see how it performs.

[RobboParticipant @robbo]

Have you had a look at the article on the ArcEuroTrade website which covers setting up the CO lathe?

Here – **LINK**

Which should answer your question

Edited By Robbo on 09/08/2015 15:45:21

[Neil WyattModerator @neilwyatt]

Ah, it's rather unconventional isn't it…

Adding shims will give you more play not less.

You can make shims from beer cans, and even use a thickness of aluminium foil to make a further small adjustment.

Neil

[V8EngParticipant @v8eng]

In the USA a company called Grizzly supplies these machines, their manuals (etc) are excellent and appear to be downloadable as PDF files.

Link here:

http://grizzly.com/products/4-x-6-Micro-Metal-Lathe/G0745

Edited By V8Eng on 09/08/2015 20:32:48

Edited By V8Eng on 09/08/2015 20:34:33

[Michael GilliganParticipant @michaelgilligan61133]

**LINK**

[superfluous now]

MichaelG.

Edited By Michael Gilligan on 09/08/2015 20:36:26

[V8EngParticipant @v8eng]

Michael.

Sorry about the confusion, my link button worked when I went back to edit the text.

[John A Cole 1Participant @johnacole1]

Thanks everyone. I bought it from ArcEuroTrade and yes, I used the review article on their site as a guide. Unfortunately, some of the review part numbers do not match the current lathe guide, which is also not clear. It does help with quite a bit but as usual, most of it you have to learn by just getting stuck in. The guide does explain some adjustments but not all, hence my question!

thanks for the Grizzly link as their PDF guide is far better than what comes with the actual lathe. And it's in real English language with no 'lost in translation' either……

[Michael GilliganParticipant @michaelgilligan61133]

Posted by John A Cole 1 on 09/08/2015 22:22:23:

Unfortunately, some of the review part numbers do not match the current lathe guide …

.

John,

Yes … I had a look at the PDF from Axminster, and was surprised to find Part 96 was neither shown, nor listed.

… Can we deduce that the design has changed since the 'Setting-Up Guide' was written?

MichaelG.

[John A Cole 1Participant @johnacole1]

Hi Michael, yes, that was my assumption as well that some changes had been made. Part 96 is now Part 122.

[Neil WyattModerator @neilwyatt]

I see… the saddle is kept in place by two strips fixed to the inner edges of the shears. So it's the same as other mini-type lathes, just 'inside out'.

No-one explains how to adjust these -the grub screws are used in opposition to the fixing screws to set the position and no shims are needed.

Take care not to overtighten the fixing screws or you will distort the strips and wear the bed.

Smooth movement is the objective, not the absolute elimination of any movement.

Neil

[victor mcconvilleParticipant @victormcconville47638]

Hi, John A Cole 1,

I have A Sieg C0 lathe which I have modified in a few area's
If you remove the Tail stock and look under the carriage along the ways from where you have removed the tail stock you will see the strips of steel that secure the the carriage down.
They are very fiddly to set and keep set as they use grub screws locked with nuts to allow minimal lift with smooth movement.

If you are interested I could describe what I did to improve the accuracy of the carriage.
Victor J

[John A Cole 1Participant @johnacole1]

Thanks Neil and Victor. I'll have a look but as it is smooth to move and no obvious movement on the saddle unless I apply force to it, I think I will see how it operates when I reassemble it.

Any information would be useful Victor, not just for me but anyone else who decides the C0 is what they require and nothing larger. It seems fairly simple so I assume that any improvements will be through experience gained.

The only other area that looks like it might need checking is backlash and how much is acceptable.

[Author]

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