What Did You Do Today (2017)

[Ed DuffnerParticipant @edduffner79357]

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.

[Andy HoldawayParticipant @andyholdaway]

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

[Anonymous]

Now that's what I call a mirror finish:

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

[SillyOldDufferModerator @sillyoldduffer]

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

[MuzzerParticipant @muzzer]

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!

[Anonymous]

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

[HopperParticipant @hopper]

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 2Participant @raymondsanderson2]

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

[RobboParticipant @robbo]

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 2Participant @raymondsanderson2]

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 CParticipant @iansc]

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 C

[BazyleParticipant @bazyle]

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,

[MuzzerParticipant @muzzer]

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….

[davebParticipant @daveb17630]

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 IoMParticipant @francesiom58905]

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

[MuzzerParticipant @muzzer]

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

[Raymond Sanderson 2Participant @raymondsanderson2]

Posted by Bazyle on 21/04/2017 11:44:23:

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,

That would be great to achieve maybe in 1/3 scale ?

Now I'll have to find a Shaper.

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

Thats $50 for all 16 books.

Frances & Muzzer I know what you mean years ago LOML & I were after 2 books her's cost $29 tops. The One on Ornamental Turning I was chasing ranged from $18 to $90 in various conditions I didn't buy it still looking.

[SillyOldDufferModerator @sillyoldduffer]

Or a copy of "The Viviparous quadrupeds of North America" could be yours for only £400,000…

[BazyleParticipant @bazyle]

Just got back from a talk on Fusion 360 at EDMES. Must run up the other old computer and see if it has the power to run it. Apparently needs 64bits. Forgot to ask if that was Morse taper bits or if parallel shank bits will do.

[RobboParticipant @robbo]

Posted by daveb on 21/04/2017 17:36:12:

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

Except that the reprint is crap quality

[MuzzerParticipant @muzzer]

Cut my first swarf today on the CNC mill. OK, it was sawdust actually but I'm claiming I didn't have any metal the right size. Anyway, the event went well. The cutter survived, my pants went unfilled and the workpiece came out with an authorised appearance.

Hold on to your lunch, Neil:

More details at http://www.murraye.com

Murray

[JasonBModerator @jasonb]

Good to see it working, for heavier work would you raise the table rather than lower the quill or is the machine as rigid as it looks so there is little difference?

J

 

PS just need to learn to hold your phone sideways when filming so the shot fills the whole you-tube screen

Edited By JasonB on 22/04/2017 07:29:32

[Anonymous]

Posted by Muzzer on 22/04/2017 00:12:20:

Cut my first swarf today on the CNC mill. OK, it was sawdust actually but I'm claiming I didn't have any metal the right size.

It's a result! Excellent stuff and a big step forward. We look forward to seeing metal chips flying.

I assume that the mill knee is not part of the CNC control? So during operation Z is limited to the quill movement. While moving the knee with quill retracted would be more rigid it's a pretty hefty mill so shouldn't have much of a problem with larger cutters and quill extended.

Andrew

[MuzzerParticipant @muzzer]

The quill has a range of about 150mm and I have to admit I had it about half way out. Possibly slightly less chance of sending the cutter into the vise and table that way. Generally I should try to minimise stickout but for messing about with bits of wood, rigidity is not an issue.

My machine is the "turret mill" type, with a quill that moves within a fixed head. The table is set to roughly the right height by means of a hand crank ie very much like a large Bridgeport. Modern vertical mills and machining centres are generally of the "bed mill" type, where the table doesn't move vertically but the entire head slides up and down to achieve Z moves. I'll have to get one of those next time.

I'll try to remember to orientate the phone better….

[KWILParticipant @kwil]

Moving coil pickups are still available, Danish Ortofon, like mine.

[Author]

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