Member postings for David Clark 1

I said the CNC manual millers I came into contact with were useless, not all CNC millers.

Yes, it can take longer to program a component than to make a manual component, it is all different now, all programmed on a computer. 20 or so years ago we programmed manually and a couple of days to write a program was not unusual.

Conversely it is often faster to program and make a one off than it is to do it manually. Depends on the complexity of the program.

My argument is that if designers did not use computers to design these complex components we would not need computers to make them.

A typical CNC job I did was replacement parts for a Nimrod. One batch of these were about 18inches long. They were surfaced all over, nothing was flat. The people who made the computer drawing (no paper drawings existed) had literally taken a part from an old Nimrod and put it on a CMM to produce the drawing. When they made the original Nimrod I doubt they had surfacing facilities. I think I was making brand new components that were 30 years old.

I had been working on these components for 3 weeks on nights and I came in for my shift and one of these so called CNC millers had skimmed the bottom of the components flat as they were distorted. No it wasn't distorted it was correctly surfaced. He had scrapped 3 weeks work. Not my problem fortunately.

If you can't use manual machines you should not be using CNC as you won't be able to use them to their best ability. I used to know severel CNC millers who could not manual mill. Totally useless.

Hi there thank you all. Still a bit weak for the workshop due to oxygen dropping. And I never smoked in my life. Hopefully a couple of weeks and I can get out there.

I thought Neil had unilaterally decided to change the spelling of arbor to arbour in the latest MEW.

Hi Bob Astill Welcome to the forum. I spent many years machining two stroke engines for British Seagull Outboard Motors back in the 1970s. Great fun was had by all.

Just read the post before hitting the "add posting " button especially on an IPad that thinks it can spell but can't.

I went to the hospital for final cancer check. All is clear with no sign of disease. I would like to thank everyone for their public and private messages wishing me well.

Regards David

Hi here again, don't forget to resubscribe. The subscription page offers paper copies.

Yes, 11.25 a month. I hope I have not given them an idea?

Tailstock turrets are very useful for multiple components. The turret is, I think, described in Spareys book.

Don't know if they still do it but I saw a documentary of a major chocolate factory that melted their old chocolate down when it went white, bulldozed it all into a pile and recycled it into new chocolate bars.

Guhring are good drills if you can afford them. Used them for years for hardened steel airplane components.

Page 47 in the magazine says £1 for 3 issues and £11.25 for a quarter. Not sure how that works for 13 issues a year?

Follow the subscription process on this site and on page 46 and you can get 3printed issues for £1 down and £11.25 a month.

You can cancel any time in the first 3 months so I would not worry. The new subscription company seems far more efficient than the old one.

Metal Turning In The Lathe by David A Clark and no, I don't get more money if more copies are sold.

£9 for digital and £11.25 for print. Did you select digital or print subscription?

I believe you can go back to the win 8 menu system by choosing settings and changing back to the win 8 start menu.

Yes, it is on the blue arbor press.

Nice engine. I hope you can put some of your other designs into ME?

I am going to sort through several thousand emails as I have been to ill to do this. Must be over 10,000 of them over 3 weeks. Then tidy up the writing room and remove anything that does not belong in there. No, it is not untidy just full of stuff I don't refer to much now. Then I will tackle Windows 10 privacy settings and start a new backup device for 2016.

Thanks Michael Gilligan. Regards David