OT Holbrook Minor Lathe

Hi all,

At work we have a duff but mechanically good Holbrook Minor lathe. It has an involved electrical control system which is the problem. We have no circuit diagram and this has thwarted attempts at fault-finding so far.

I was wondering if anyone here had intimate knowledge of this model, or knows someone who does. It galls me that its out of action. A circuit diagram would be very helpful. We'll happily pay a repairman, if one's out there somewhere. With a spare lathe, I feel sure I could sneak a few engine jobs on it after hours :-).

Regards, Arthur G

Reply to
Arthur G
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Try asking on the rec.crafts.metalworking newsgroup. Mostly Americans but some brits and generally helpful folks.

John

an involved electrical control system which

at fault-finding so far.

knows someone who does. It galls me that its

pay a repairman, if one's out there somewhere.

Reply to
John Manders

Its obviously of no further use to the Co. I suggest you take it home before fixing it :-) regards Roland

an involved electrical control system which

at fault-finding so far.

knows someone who does. It galls me that its

pay a repairman, if one's out there somewhere.

Reply to
Roland and Celia Craven

Have you tried snipped-for-privacy@lathes.co.uk ? there is a good description of the minor on his website, who knows what other information he might have tucked away.

BTW. If you like machine tools I wouldn't recommend looking at the site unless you have plenty of time to spare - it's a real 'trapper'!

Reply to
Nick H

Arthur,

Describe the fault, I am a machine tool fitter by trade and maybe able to help.

Martin P

Reply to
Campingstoveman

Nick, I've been to lathes.co.uk and he has no manual for the Minor.

Roland, get thee behind me!

Martin, the fault is that the lathe draws far too much current when you switch on and trips out, my suspicion is that some sort of an electromagnetic spindle brake/clutch is stuck on.

The wiring is quite complex and its difficult to follow what's going on.

Regards, Arthur G

Reply to
Arthur G

involved electrical control system which

fault-finding so far.

someone who does. It galls me that its

repairman, if one's out there somewhere.

Try posting this to uk.rec.models.engineering, Arthur, most of the guys are more than helpful and will try and help.

Peter

-- Peter A Forbes Prepair Ltd, Luton, UK snipped-for-privacy@easynet.co.uk

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Reply to
Prepair Ltd

Peter,

I am ashamed of you, are you implying that we who can fix anything are not helpfull :-)) (people will dangle carrots in frony of me) Martin P

Reply to
Campingstoveman

Gentlemen,

And before anybody asks, yes I have been to work today. Changed 3 x 1um and

1 x 5um water filters, tested an auto watering system and tested a auto filling bottle station. Took me longer to get there and back than to do the job.

Martin P

Reply to
Campingstoveman

on and trips out, my suspicion is that

Is this the one with the separate feed motor under the headstock at the rear. Or is it the one with two electrical speeds on a big joystick lever?

-- Regards,

John Stevenson Nottingham, England.

Reply to
John Stevenson

I 'um when I don't know the words as well

John

Reply to
John Manders

John,

Will micron do then. :-))

Martin P

Reply to
Campingstoveman

Not at all, Martin, we are fully aware of your talents :-))

It's just that there are more machinery equipment people on there than here, and also a lot of guys who have better contacts than most of us.

I also suggested that Arthur post a wanted ad on Chris Heapy's pages as well.

I did have a chat with Arthur to see if it was the same machine that I sold when Bob West closed his workshop down a few years ago, but John Stevenson has now picked it up I see, which is what it needs to get it sorted out.

While I was talking to Arthur, he had a message to say that "someone called Kim" was trying to get hold of him! :-))

Peter

-- Peter A Forbes Prepair Ltd, Luton, UK snipped-for-privacy@easynet.co.uk

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Reply to
Prepair Ltd

Obviously nobody has got much to do today, and nobody suggest that they are looking in between work, just like I am :-))

Martin P

Reply to
Campingstoveman

Micro-metre is probably nicer :-))

Those of us that use the micro symbol (Arthur must need to use it all the time as he is making capacitors) are not well served by Microsoft and Ansi, although I have seen the symbol in some character sets.

Peter

-- Peter A Forbes Prepair Ltd, Luton, UK snipped-for-privacy@easynet.co.uk

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Reply to
Prepair Ltd

Chaps,

many thanks for all your help and suggestions.

A major advance has been made, conversation here stimulated one of the old stagers to say, "I remember a circuit diagram for that". Within an hour he found it!

We now have something to work with. I'll try to spend some time tracing the problem tomorrow.

Regards, Arthur G

Reply to
Arthur G

stagers to say, "I remember a circuit diagram

problem tomorrow.

Hope you will let us know what happens? please ? :-))

Peter

-- Peter A Forbes Prepair Ltd, Luton, UK snipped-for-privacy@easynet.co.uk

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Reply to
Prepair Ltd

Not 'quite' right, we are very busy, but lots of official email going on so I can quite easily pop into the newsgroups while on-line for other company matters :-))

Arthur is technically a 'supplier' being a capacitor manufacturer, so I can have a chat with him at any time....

Peter

-- Peter A Forbes Prepair Ltd, Luton, UK snipped-for-privacy@easynet.co.uk

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Reply to
Prepair Ltd

- and that was me in Wales on my way to see Arthur and Jenni, report of trip follows ;o))

Regards,

Kim

Reply to
J K Siddorn

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