ML7 Lath carriage assembly

the feedscrew of the carriage ass.on my ML7 lath has an adjustable scale.But when I turn the feedscrew the scale sometimes don't move sothat it is unreliable to use. Who can give me a solution or has a drawing to see the working.

There are three 'feedscrews' on a standard ML7. The long one under the edge of the apron, running the length of the machine, doesn't have a scale as standard, but there is an extra calibrated round handle at the tailstock end. The other two are on the cross slide for the toolpost, and on the toolpost slide itself. Both have a standard bevel scale, but fixed. So, it may be that your ML7 has been modified over the years, and it is certain that an adjustable scale is a useful mod to have. So, can you tell us a bit more about the position etc of your problem scale, please?

The normal scheme for an adjustable scale is to have a spring holding the disc with the calibrations against a disc fixed to the spindle. Friction moves them together, but allows the scale to be zeroed so you can return to a given setting easily. If you take one of them apart, do it inside a polythene bag, and then you won't spend three days looking for the spring...

Regards

Tim

Thanks for your email.

Salij, Is this the kind of screw you have?

Best regards,

Steve.

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Steve,

I do hope that Salij has the straight version [not like that one of mine]

MichaelG.

Yes Michael,

Should have given you the credit. Apologies.

Steve.

No problem at all, Steve

MichaelG.

This is the one I have. The original scale is left separate. I made a some what bigger one which is easier to read.

Henk Salij

Henk, to place a photo in a post you first have to upload it to your album. Henk sounds very Dutch so I give it a try; een foto plaatsen in een bericht gaat een beetje omslachtig, je moet dat eerst in je fotoalbum (vind je helemaal bovenaan op deze pagina) hoogladen en daarna kan je die foto pas in je bericht zetten. Niko.

Indeed I am dutch and live in Ridderkerk in the Netherlands. So I put the picture in my album. Is it now visible. Henk Salij

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Perfectly visible ... Thanks to Niko's quick thinking; and communication at the speed of light !

MichaelG.

Thanks for this fast reply. I did not know I had to place the picture in an album because it is the first time that I make use of this forum inspite that I have since very long the MEW

Henk

Sorry, but I can't open your picture.

Tim

The problem is that original this Myford had a fixed dail as in the picture of Steve (or is it MichaelG?), the one you replaced is also not original. Perhaps you can get it working correctly with a bit of tinkering, if not you are most likely best of by buying from Myford UK a "C13, Resettable Dail - Metric 20/253". I myself have no experience with this up-date so do not know if they have the same problem, perhaps other forum members can comment on them. Niko.

Edited By speelwerk on 03/05/2015 23:32:32

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Tim,

Try refreshing the page ... you may be seeing a cached version of the post.

MichaelG.

Henk, the dials on your machine are not original. They look like replacements taken from one of the Far Eastern lathes or mills which are available as spare-parts from some dealers. However, in that case they should consist of a concentric assembly .... an inner hub and the outer, calibrated ring with a "leaf" spring to provide friction between ..... and it doesn't look as if your are like that - but it's hard to tell.

Yours seem to be replacement, fixed dials (like the original) but which are not fixed very well so that they slip. If that is true ... well the originals were horrible and the replacements won't be much better. Resettable dials are much to be preferred and can be made from scratch or (as I did) they can be fairly easily adapted from the lathe/mill spare parts referred to before.

Thank you all for your fast contribution. It gave me a lot of thinking and I am going to try some solutions like more friction.

Drill from the edge to the centre, M3 or 4, tap thread, insert brass pad coil spring and grub screw, adjust for desired friction.

That is a brilliant solution. Thanks for this. I did it immediately and it works! Henk.