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What Did You Do Today (2017)

Report what you have been upto here (engineering related)

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Mike Poole18/04/2017 23:06:12
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847 forum posts
25 photos

I was in HMV a few days ago and was quite surprised at the quite large display of LPs, had to smile, on the way out I saw a record cleaning kit, did nobody tell the youngsters that although vinyl sounds good it is very high maintenance. I still have some vinyl that I can't replace but I rehomed most of my collection.

Mike

JA18/04/2017 23:24:47
715 forum posts
33 photos

I never chucked out my old vinyl LPs but I now have nothing to play them on. Not all were replaced by CDs and amongst them is some really amazing stuff (or absolute rubbish) from the late 60s and early 70s.

Obviously I will need a "good" turntable. I understand moving coil pick-ups are hard to come-by and a pre-amp may be required (I have not really looked into this recently). Do I want to, I ask myself?

JA

Raymond Sanderson 219/04/2017 01:09:10
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338 forum posts
97 photos

I also still have my small collection of Vinyl's mainly The Moody Blues and from there a variety through to classics.

I say small collection as a mate who is in the music industry (Mastering sound engineer) his Vault as its know houses the equivalent of a double garage.

I also no longer have something to play them on BUT as the stores here are now again selling turntables **LINK**

There is nothing like listening to a record in comparison to a CD so many remakes have been doctored an even added to making them very different.

As for audiophies it was one area I envied to venture into but never did not to say i didn't enjoy doing some repairs on old systems at times.

**LINK**

Raymond Sanderson 219/04/2017 01:10:55
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338 forum posts
97 photos

Just found this LOL **LINK**

Ed Duffner19/04/2017 01:42:04
644 forum posts
56 photos

Over the Easter weekend I managed to build a working Nikon F100 film camera fom two faulty bodies. This has prompted an idea for an engineering project to make an adaptor which might allow a digital camera (attached in tandem) to check autofocus accuracy by digitally imaging a matte screen mounted at the film plane. I'm thinking of something like a slide copier.

Ed.

Andrew Holdaway19/04/2017 09:16:36
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145 forum posts
14 photos

Windy, Re: your 'checking instrument'. I've seen something very similar to this in the dim and distant past used for checking car inlet and exhaust valves for straightness and wear on the shaft.

Andy

Andrew Johnston20/04/2017 14:22:03
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3409 forum posts
409 photos

Now that's what I call a mirror finish:

mirror finish.jpg

I haven't measured the Ra (don't want to scratch the surface) but a fingernail comparison with a Rubert scale suggests that the Ra is under 0.4µm. Thickness variation across the plate is less than 0.07mm.

Apart from deburring the edges the finish is straight off the vertical mill.

Andrew

SillyOldDuffer20/04/2017 17:52:18
1858 forum posts
423 photos

Mislaid two fishtail thread gauges, the plastic pipe from my aerosol can of cutting fluid, and one of the finished bolts I made.

To complete a perfect day, after breaking the tip off my last carbide threading insert, I found the Project Box I spent a tenner replacing last week.

Should have stayed in my armchair watching Teletubbies.

Dave

Muzzer20/04/2017 19:12:34
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2208 forum posts
377 photos
Posted by Andrew Johnston on 20/04/2017 14:22:03:

Now that's what I call a mirror finish:

What sort of copper - low oxygen, pure copper - or some sort of "machinable" alloy?

No fingerprints even!

Andrew Johnston20/04/2017 20:34:09
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3409 forum posts
409 photos
Posted by Muzzer on 20/04/2017 19:12:34:

What sort of copper - low oxygen, pure copper - or some sort of "machinable" alloy?

No fingerprints even!

It's pure copper, probably C106 deoxidised, but I had enough trouble finding any sort of thick (8mm) copper plate, so beggars can't be choosers.

No fingerprints - that's the power of acetone.

Andrew

Hopper20/04/2017 22:59:38
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1911 forum posts
22 photos
Posted by SillyOldDuffer on 20/04/2017 17:52:18:

Mislaid two fishtail thread gauges, the plastic pipe from my aerosol can of cutting fluid, and one of the finished bolts I made.

To complete a perfect day, after breaking the tip off my last carbide threading insert, I found the Project Box I spent a tenner replacing last week.

Should have stayed in my armchair watching Teletubbies.

Dave

So it was a good day then .

Raymond Sanderson 220/04/2017 23:43:46
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338 forum posts
97 photos

A late visit to a wood forum last night and I spotted these books for sale they will be mine by next week. wink

img_7314.jpg

img_7313.jpg

Robbo20/04/2017 23:55:48
1279 forum posts
127 photos

Raymond

That "Shaping Machine" book by Ian Bradley has for some reason achieved cult status and sells for loads of dosh on Amazon etc.

I have 2 or 3 of the others as well in my library. Original editions.

Raymond Sanderson 220/04/2017 23:58:05
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338 forum posts
97 photos
Posted by Robbo on 20/04/2017 23:55:48:

Raymond

That "Shaping Machine" book by Ian Bradley has for some reason achieved cult status and sells for loads of dosh on Amazon etc.

I have 2 or 3 of the others as well in my library. Original editions.

Thanks Robbo I have not paid for the lot yet hope Troy doesn't see your post the $50 for the lot might just explode some what.

Ian S C21/04/2017 11:35:18
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6354 forum posts
211 photos

The "checking tool" might well have been used before using this, you might as well have a straight valve stem before you start refacing the valve.

Ian S Cdsc00711 (640x480).jpg

Bazyle21/04/2017 11:44:23
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3457 forum posts
157 photos

Raymond we expect to see a thread on you building a small lathe, using your own castings (though not essential in the Mason design) cutting the changewheels with your sharp tools etc, cheeky

Muzzer21/04/2017 15:07:32
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2208 forum posts
377 photos
Posted by Robbo on 20/04/2017 23:55:48:

Raymond

That "Shaping Machine" book by Ian Bradley has for some reason achieved cult status and sells for loads of dosh on Amazon etc.

I have 2 or 3 of the others as well in my library. Original editions.

Funny, sounds as if the book may be worth more than the typical machine....

daveb21/04/2017 17:36:12
476 forum posts
9 photos

The Myford book was advertised at £50+ when it was out of print, must've hurt if you paid this because they reprinted it.

Frances IoM21/04/2017 18:14:32
422 forum posts
20 photos
crazy prices on Amazon are SOP when the dealer doesn't hold a copy - if some punter is willing to pay these prices then somewhere in the dealer network the copy will 'magically' appear to give profit to both sellers.

Edited By Frances IoM on 21/04/2017 18:15:27

Muzzer21/04/2017 18:37:33
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2208 forum posts
377 photos

Not always. For instance, a copy of EC Snelling's Soft Ferrites still commands a healthy premium. They are an essential text for magnetics designers yet rare as hen's teeth.

I managed to get a pristine 2nd Edition copy for £50 - must sell it on some day. Having said that, you can buy a paperback reprint these days for a mere $150 but other magnetics designers might sneer at you then.....

Murray

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