Something special coming in issue 253 of MEW

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Something special coming in issue 253 of MEW

This topic has 54 replies, 19 voices, and was last updated 15 April 2017 at 13:20 by simondavies3.

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6 March 2017 at 10:23 #287392
Neil Wyatt
Moderator
@neilwyatt
As an experiment, MEW 253 will include an 8-page pull-out plan for a Tailstock Turret to suit lathes of roughly 3" to 5" centre height. The plan will be accompanied by a detailed and illustrated build article.

This will be an up to date take on the sort of plans included in our earliest issues, but the design is a new and unpublished one.

Obviously 8 pages of plan plus several pages of text is a lot to dedicate to one subject in a single issue, so I have chosen a well thought out, practical and attractive design that I hope will be of interest to most readers.

This is an experiment, I will be waiting for reader feedback before looking at repeating the exercise, but I hope you will like it!

Neil
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6 March 2017 at 10:23 #38399
Neil Wyatt
Moderator
@neilwyatt
Shakin’ off our boots, we’re going back to our roots!
6 March 2017 at 11:08 #287403
ega
Participant
@ega
Neil Wyatt:

I look forward to this as I think an effective TT is a very useful addition to an amateur lathe.

One problem in practice is the tools fouling the toolpost particularly if a rear toolpost is fitted. For this reason, the late J A Radford preferred QC tailstock tooling, publishing his design in ME and his book "Improvements & Accessories for your Lathe". I have built this and use it very satisfactorily on my Super 7.

My larger lathe has a conventional TT, again very useful but fouling is a problem and I have often wished that the QC tailstock tooling once offered by Arrand were still available. I guess that the Arrand tools were based on a short steep taper with some means of retention/release. Can anyone add to this?
6 March 2017 at 11:19 #287408
V8Eng
Participant
@v8eng
An 8 page pull out, this is probably a daft question but here goes anyway:

Will it work properly for us digital only subscribers?
6 March 2017 at 11:31 #287410
mick70
Participant
@mick70
whens it out?

and would it work on clarke 430 with 6" centre height?

Edited By naughtyboy on 06/03/2017 11:33:30
6 March 2017 at 11:45 #287416
JasonB
Moderator
@jasonb
V8Eng makes a good point, the Metro pull out plans that were in ME at the end of last year did not work well in digital.

Maybe Neil could add them as a pdf in the "subscribers only" section to make it easier to view and save on the sticky tape when trying to piece them together
6 March 2017 at 11:46 #287417
Rick Kirkland 1
Participant
@rickkirkland1
Will it be numbered ‘issue 251’?
6 March 2017 at 11:47 #287418
richardandtracy
Participant
@richardandtracy
Posted by naughtyboy on 06/03/2017 11:31:19:

whens it out?

and would it work on clarke 430 with 6" centre height?

Just what I was thinking, but with an additional though: I wonder if it could be adapted for a toolpost, and if so, maybe into a cnc tool changer. All-in-all it makes it sound very interesting.

Regards,

Richard.
6 March 2017 at 12:01 #287426
Neil Wyatt
Moderator
@neilwyatt
Posted by JasonB on 06/03/2017 11:45:16:

V8Eng makes a good point, the Metro pull out plans that were in ME at the end of last year did not work well in digital.

Maybe Neil could add them as a pdf in the "subscribers only" section to make it easier to view and save on the sticky tape when trying to piece them together

A good idea, Jason.

Neil
6 March 2017 at 12:04 #287428
Neil Wyatt
Moderator
@neilwyatt
Posted by naughtyboy on 06/03/2017 11:31:19:

whens it out?

and would it work on clarke 430 with 6" centre height?

Yes, It will work on any lathe big enough, but obviously you may not be able to use really large tooling with it. It is shown with an MT2 shank to suite mini lathe, Myford and most popular hobby lathes, but advice on fitting an MT3 shank is included.

Neil
6 March 2017 at 12:06 #287429
Neil Wyatt
Moderator
@neilwyatt
Posted by richardandtracy on 06/03/2017 11:47:33:

Just what I was thinking, but with an additional though: I wonder if it could be adapted for a toolpost, and if so, maybe into a cnc tool changer. All-in-all it makes it sound very interesting.

Regards,

Richard.

Probably not too practical, but I expect MEW to be carrying an article (not with full plans, but lots of practical information and photos) on a shop-built cnc tool changer for a milling machine some time in the not-too-distant future.

Neil
6 March 2017 at 12:24 #287430
richardandtracy
Participant
@richardandtracy
I'm doing a cnc lathe conversion (in very slow time at the moment!) and a tool turret is both an interesting possibility and something I have seen on some of the smaller commercial machines. I look forward to the ideas if nothing else, as it's always the basic idea that's the hardest bit to come up with.

Regards,

Richard.
6 March 2017 at 13:46 #287449
Hopper
Participant
@hopper
Sounds like a great idea. I look forward to seeing it. Sounds more like the type of stuff mags published more of decades ago. It seems ironic that as drawing has gotten supposedly easier with CAD etc, authors seem to submit fewer articles with comprehensive drawings of tooling. Maybe because digital photography has made pics so much easier than drawing? Looking back at old ME and even MEWs, the hours put into pen/pencil drawings must have almost rivalled the time put into building the original project, but photos were mostly pretty basic, or sometimes non-existent.

Will the upcoming turret drawings be metric or imperial?
6 March 2017 at 13:59 #287454
Neil Wyatt
Moderator
@neilwyatt
The drawings will be fully metric.

I've come to the realisation that I work wood in metric and metal in imperial…

Neil
6 March 2017 at 14:07 #287456
Allan B
Participant
@allanb
I am really looking forward to this, especially as the plans are in metric

Neil, I am the opposite way round, I work wood in imperial and metal in metric lol

Allan
6 March 2017 at 14:13 #287458
Roderick Jenkins
Participant
@roderickjenkins93242
Posted by Neil Wyatt on 06/03/2017 13:59:37:

I've come to the realisation that I work wood in metric and metal in imperial…

Me too. I've come to the illogical conclusion that it's because +/- 1thou is fine for what I mostly do in metal and +/- 1mm is adequate for woodwork.

Cheers,

Rod
6 March 2017 at 14:15 #287459
Mike Poole
Participant
@mikepoole82104
Is this turret made of wood Neil?

Mike
6 March 2017 at 16:03 #287474
Neil Wyatt
Moderator
@neilwyatt
It's not my design :-0

Neil
6 March 2017 at 19:15 #287503
mechman48
Participant
@mechman48
Looking forward to seeing this, sounds verrrrrry interesting.

George.
6 March 2017 at 20:57 #287512
John Stevenson 1
Participant
@johnstevenson1
Posted by richardandtracy on 06/03/2017 12:24:02:

I'm doing a cnc lathe conversion (in very slow time at the moment!) and a tool turret is both an interesting possibility and something I have seen on some of the smaller commercial machines. I look forward to the ideas if nothing else, as it's always the basic idea that's the hardest bit to come up with.

Regards,

Richard.

You need one of these.

But then again you might not be able to afford one.
7 March 2017 at 08:27 #287537
richardandtracy
Participant
@richardandtracy
John,

Think you're right. I do need one. Less a matter of being able to afford one than 'How to create one on a budget of next to nothing (or preferably, absolutely nothing)?'. I do have about 150kg of LM4 lying around and a small furnace, so that's part of the raw material problem sorted. The rest is probably available as re-workable scrap at home. A small stepper motor is hard to blag for free, but they aren't too expensive.

Regards,

Richard
7 March 2017 at 08:53 #287538
Ex contributor
Participant
@mgnbuk
You need one of these.

Is this real or "virtual" ? It looks like a rendered Cad drawing, so may not actually exist ?

it appears to be a commercial worm reduction box with, maybe, a ratchet positioning system in the plate bolted on the front behind the turret ? How does it clamp ? More details would be nice !

Nigel B
7 March 2017 at 09:00 #287539
Michael Gilligan
Participant
@michaelgilligan61133
Posted by John Stevenson on 06/03/2017 20:57:50:

You need one of these.

[…]

But then again you might not be able to afford one.

.

That looks tidy, John

… Do you have any detail of the innards ?

Presumably a worm gearbox, but the spindle-locking arrangement might be interesting.

MichaelG.

.

Edit: Nigel got there before me.

Edited By Michael Gilligan on 07/03/2017 09:01:24
7 March 2017 at 09:01 #287540
JasonB
Moderator
@jasonb
Not much different to what you find on a basic Emco compact 5 CNC, just built up with plate and a few more tool positions
7 March 2017 at 09:18 #287541
Michael Gilligan
Participant
@michaelgilligan61133
Posted by JasonB on 07/03/2017 09:01:47:

Not much different to what you find on a basic Emco compact 5 CNC, just built up with plate and a few more tool positions

.

Thanks, Jason

That said; I've never seen inside a "basic Emco compact 5 CNC" and my question remains open.

MichaelG.

.

P.S. [for Richard] … This might be useful:

http://www.denfordata.com/bb/viewtopic.php?t=4118

Edit: at about 2min 10sec … This video shows the indexing latch:

https://m.youtube.com/watch?v=UR1x8yFYUeg

Edited By Michael Gilligan on 07/03/2017 09:32:50
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