What Did You Do Today (2016)

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Neil Wyatt on 05/03/2016 19:06:18:

Now can anyone guess what it is?

.

Maybe one like this **LINK**

MichaelG.

[Neil WyattModerator @neilwyatt]

Hmm that site sets of the warning bells from my ISP.

Too powerfui for an Adept!

Anyone who went to the Manchester show might have an idea

Neil

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Neil Wyatt on 05/03/2016 20:13:15:

Hmm that site sets of the warning bells from my ISP.

.

Apologies … it seems clean on mine

Assumed him to be a decent chap; he's even got an Astronomy section

MichaelG.

[Neil WyattModerator @neilwyatt]

Turned nine cubic inches of aluminium alloy into less than two useful cubic inches, plus rather less than 5 cubic inches of offcut. That leaves 2-3 cubic inches of swarf so why is there enough to fill a pint glass?

Neil

[Anonymous]

I've indulged in more cheque book engineering. This time via Ebay:

It's a vertical slide and a high speed milling/grinding quill for my Pultra 1750.

Andrew

[JasonBModerator @jasonb]

Looks in good nick.

I assume there is a round spigot on the spindle body that locates in one of the two holes in the slide?

Depth stop could be handy too.

[Bob RodgersonParticipant @bobrodgerson97362]

While milling an internal thread on my Tormach mill I discovered why it is important to install any software updates. The internal thread was a bit tight so I increased the major diater a few thou and ran the programme again but it was still too tight a fit. I added anothercouple of thou but this time when I ran the programme there was no helical motion to the tool path, just vertical linear motion for each pass of the tool. No matter what I did it still wouldn't work.

I retired to the house in defeat and decided to drop Tormach an email to see if they could help. While checking their site for contacts when I came accross an update to Path Pilot. On reading the update notes I discvered that it cures a problem in Path Pilot conversational programming with the helix collapsing when a relatively large number of steps are used to cut the thread. I installed the update and it is all working as it should.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Andrew Johnston on 08/03/2016 13:43:18:

I've indulged in more cheque book engineering. This time via Ebay:

It's a vertical slide and a high speed milling/grinding quill for my Pultra 1750.

Andrew

.

Very nice Andrew

It doesn't get much better than that.

I have the vertical slide, but not that lovely spindle.

MichaelG.

[egaParticipant @ega]

Mike:

Just spotted your 28 February post with link to the KMX Karts site. The F8 looks like excellent value.

I love my own recumbent trike but would be the first to admit it does not lend itself to load carrying.

[Michael GilliganParticipant @michaelgilligan61133]

For anyone who wonders what the 'Pultra' fuss is about:

.

The spindle is rated at 20,000 rpm

MichaelG.

 

Edited By Michael Gilligan on 08/03/2016 16:01:31

[egaParticipant @ega]

Michael Gilligan:

My eyesight is not rated at 20/20 but zooming in helped me to read the Pultra document!

The quill is superficially similar to the Quorn's arrangement but I take it that the Pultra bearings are not the angular contact variety; the use of a coil wick is interesting – presumably it prevents the bearings being "flooded" with oil.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by ega on 08/03/2016 17:00:50:

Michael Gilligan:

My eyesight is not rated at 20/20 but zooming in helped me to read the Pultra document!

.

Did you click on it to get the full resolution version ?

MichaelG.

.

Edit: This is the best I can get of Fig. 21  … Should make sense if coloured-in

Edited By Michael Gilligan on 08/03/2016 17:50:18

[egaParticipant @ega]

Michael Gilligan:

In truth I didn't, but thanks for reminding me of this useful feature.

[Anonymous]

Posted by JasonB on 08/03/2016 13:46:41:

I assume there is a round spigot on the spindle body that locates in one of the two holes in the slide?

Correct; one expects nothing less of old school British manufacture.

The only snag is that the degree scales on the top slide for aligning the quill have worn away. I can live with that though.

As far as I can see the bearings are not angular contact, although they are preloaded. Rotation feels very smooth so I plan to leave well alone. Elsewhere in the handbook quill speeds are listed from 271rpm to 21900rpm depending upon the pulley sets in use.

A slight irritation is that the quill uses 8mm collets rather than the 10mm collets used in the lathe headstock and tailstock. I've got a couple of 8mm collets that came with a selection of capstan tooling, but I'll have to keep an eye out for some more.

Andrew

[egaParticipant @ega]

I think Michael Gilligan's blow-up does indeed show that they are not angular contact bearings. I can now see the labyrinths but I am not clear as to how the pre-load is applied.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by ega on 09/03/2016 12:35:08:

I think Michael Gilligan's blow-up does indeed show that they are not angular contact bearings. I can now see the labyrinths but I am not clear as to how the pre-load is applied.

.

It's still tricky to see the detail on the blow-up, but: B & C are identified in the text as 'threaded cups'

MichaelG.

[Howard LewisParticipant @howardlewis46836]

F W I W, I use a pastry brush to clean swarf off the lathe, where the dustpan brush won't reach.

(Sometimes, cheap paint brushes will do this job quite well)

For Taps and Dies, an old tooth brush is very handy for cleaning before putting away.

Empty food tins, cleaned, are useful for filling with swarf (Well packed down with a piece of 1.5" /38mm bar)

For fine swarf, a stick magnet in a copper tube with a closed end, is handy for retrieving and transferring into the tin.  Unfortunately, only works with ferrous materials, wish it did with brass or ali!

Then just before completely full, (packed down) add the lid and hammer over the edges, before dumping into the recycling. (Not tight, just careful y'ken)

Howard

Edited By Howard Lewis on 09/03/2016 16:26:57

[mechman48Participant @mechman48]

Not exactly today, more over the weekend; made up a small X axis DRO for my lathe using a cheap digi calliper from Aldi's. The pics show the make up of it, although looking rough & ready I assure you that it was cleaned up somewhat once finished. The block can slide along with the saddle once the 5 mm lock bolt is freed off, when needed the bolt is locked to the underside of the shear & the read head is locked whilst the scale moves with the saddle. As for consistency it has shown to be within .01mm which I find acceptable for what I'm pottering with… not a lot so far…

Using the wiper fixing location, swapped the screw for a 3 mm bolt… the bracket has been soldered onto the scale

Underneath fixing, used metal to metal epoxy resin.

Not pretty but for testing set up …

Set at zero…

135.91mm useable length

Nothing complicated nor aesthetically perfect but a simple enough job for what I use at the mo' until I can afford some decent kit.

George.

[pgk pgkParticipant @pgkpgk17461]

Finally got around to making a simple die holder..different diameters each end on a simple sliding shaft. Easy enough.

[Clive HartlandParticipant @clivehartland94829]

Re. the high speed spindle, it looks very much as if the pre-load is done with Bellville washers, set face to face. This is quite a common method of pre-loading drives.

Clive

[Jon GibbsParticipant @jongibbs59756]

I finally finished off my take on HH's simple end-mill sharpening jig for the bench grinder.

Instead of the square section blocks with holes and set-screws I decided to base it around a home made ER32 block, with a respectful nod to Sir J.S. of Bridgeport, and am pretty chuffed with the results.

I just bought a second hand mill with what turned out to be a load of blunt end-mills and slot-drills so I can see it'll get a fair bit of use.

It's no good for the edges of course but for the ends it seems to do the job very nicely – had to give a freshly sharpened end-mill a go last night and it cut very sweetly.

Jon

[Michael GilliganParticipant @michaelgilligan61133]

Today:

Mourned the loss of Keith Emerson

Ars longa, Vita brevis

MichaelG.

[Neil WyattModerator @neilwyatt]

Posted by Michael Gilligan on 12/03/2016 09:31:36:

Today:

Mourned the loss of Keith Emerson

Ars longa, Vita brevis

MichaelG.

Another man down .

Many of us have reached an age where the legends of our youth are fading fast.

Neil

[60019Participant @60019]

Posted by Michael Gilligan on 12/03/2016 09:31:36:

Today:

Mourned the loss of Keith Emerson

Ars longa, Vita brevis

MichaelG.

Me also.

On my 17th birthday in September 1969 I attached the L plates to the car and persuaded my dad that my first driving lesson should be a trip from Leeds to Harrogate for me to meet up with three of my mates and attend a Nice concert. Not sure of the venue, I guess the Royal Hall.

This week we all gathered again to attend the funeral of the mother of one of them.

Fond memories all round, but that b****y clock keeps ticking…

Mike

[jaCK HobsonParticipant @jackhobson50760]

Posted by Andrew Johnston on 08/03/2016 13:43:18:

I've indulged in more cheque book engineering. This time via Ebay:

It's a vertical slide and a high speed milling/grinding quill for my Pultra 1750.

Andrew

I had my eye on that. I hope it is as good as it looks.

[Author]

Posts