What Did You Do Today 2019

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Paul Lousick on 05/01/2019 00:38:12:

The GemRed web site for digital angle gauges specifies a resolution of 0.1° and a repeatability of ±0.1°. You would need a sine gauge for anything more accurate.

Edited By Paul Lousick on 05/01/2019 00:40:31

.

So presumably George is actually displaying 45.1 degrees, and 45.0 degrees

MichaelG.

Edited By Michael Gilligan on 05/01/2019 00:49:01

[Brian HParticipant @brianh50089]

Broke a 10BA tap today, that the third tap I,ve broken in 60 years! The last one was also 10BA and the first one was 1/4" Whit on the end of a 4ft long tap wrench in the crown of a 12" piston.

Brian

[roy entwistleParticipant @royentwistle24699]

Brian H

Clumsy

[mechman48Participant @mechman48]

Digi readings as displayed for the later two angle plates …

60* side…

30* side …

so; 59.9* + 30.1* = 90 *

20* side…

70* side …

so 70* + 20.1 = 90.1* I'm contributing the 0.1' discrepancy in all down to the digi gauge +/- 0.1* as mentioned by
Paul Lousic's post …

''The GemRed web site for digital angle gauges specifies a resolution of 0.1° and a repeatability of ±0.1°. You would need a sine gauge for anything more accurate''.

Just in case the question is asked I zero the digi gauge before readings on ea. side…

So now that I've refreshed my old grey matter with trigonometry workings I'm a happy bunny… now on to a couple more – 5*-10*-15*- 25* using the same methodology… … don't think I need to post on the rest.

George.

[DrDaveParticipant @drdave]

Reading Mr Cutwel’s latest caralogue that arrived recently, I noticed that one of their indexable face mills is advertised as having “hugh feed rates”. This means a feed of 1.0 to 1.5 mm per tooth in carbon & alloy steels. I suspect that my little Sieg mill might not be up to that!

[Barnaby WildeParticipant @barnabywilde70941]

Posted by DrDave on 06/01/2019 17:21:48:

Reading Mr Cutwel’s latest caralogue that arrived recently, I noticed that one of their indexable face mills is advertised as having “hugh feed rates”. This means a feed of 1.0 to 1.5 mm per tooth in carbon & alloy steels. I suspect that my little Sieg mill might not be up to that!

I suspect that you're right.

There are many factors involved in metal removal rates, yet real world physics plays the biggest, but perhaps the most ignored part !

[mechman48Participant @mechman48]

Finished off the set of angle plates; all within 0.1* according to my digi gauge…just need a bit more polish up…

George.

[Joseph Noci 1Participant @josephnoci1]

Completed my Drill Alignment microscope jig to align drills in my 4 facet grinding jig ( previously posted on).

The optical head is a Bausch and Lomb Zoom microscope, and I fitted a horizontal reticule in the right eyepiece after some advise and guidance from Robert Atkinson – Thanks Robert!

The 5C collet in a square block holder sits on a focusing stage as seen.

The focusing stage – drill end view

Focusing stage – side view

Th reticule is a plastic ring sized to fit inside a threaded reticule holder that screws into the underside of the eye piece. A single fibre of fibreglass was teased from some weave, and superglued to the 180deg apart slots made in the sides of the plastic ring. The ring then inserted in the holder and screwed into the eye piece until focused.

View ( focus was difficult..) of the fibre reticule in place, from the bottom of the eye piece.

View through the microscope, focused on a 3mm drill, showing the reticule.

The camera was difficult to focus, being handheld, so the drill image is not that clear – it is VERY sharp when eye viewed.

The difficult part in the construction was getting the microscope sight-line horizontal and in line with the drill point at all focus ranges and zoom settings.

This at lowest zoom setting – at full zoom the 3mm drill fills just over half the image

Then I added a micrometer to the drill grinding stage on the grinder to be able to minutely advance the drill to grind the primary facet – I was using the X slide to do that, but with small drills ( sub 2mm) the movement is difficult to keep fine. The micrometer makes it a doddle!

Makes sharpening drills a pleasure!

Joe

[Neil WyattModerator @neilwyatt]

Just to be pedantic 0.1 degree on a wixey type gauge is six minutes.

A 0.1 degree error is only 1.7 thou per inch, or about 3 thou over the width of the gauge.

Neil

[mechman48Participant @mechman48]

Thanks Neil; I'll not worry over 1.7 thou' per inch in what I do

Geo.

[ChrisHParticipant @chrish]

Yesterday morning early my daughter was driving to work along the dual carriageway from Guildford to Alton and spotted a car head first into the ditch, obviously been there a little while as the windows were all frosted over.

She phoned 101 and they said yes, they'd had numerous calls re the incident already. So daughter asked if anybody was going to check if anyone was inside. Their reply stunned her. Yes, they said, they would do if they had anyone available, or if they had anyone driving by they would ask them to check it out. Absolutely disgraceful.

So what happens if there is anyone inside unable to summon help themselves? Tough luck it seems, hope they don't die before anyone can be bothered to check.

Moral of the story is, don't get into any difficulty and go off the road, at night and in freezing conditions especially, but if you do, don't expect help to arrive anytime soon.

Welcome to todays not-so-great anymore Britain.

 

 

Edited By ChrisH on 11/01/2019 10:30:11

[duncan webster 1Participant @duncanwebster1]

Joseph, I've puzzled about this for a long time. As soon as you grind even the smallest amount off the end of the drill, it's cutting edge is no longer horizontal. Shouldn't you set it so that after a known cut the edge will be horizontal? Of course that implies knowing the helix angle and they are not all the same. I asked DG Brown the same question once and he replied you should set it as I suggest and that you soon learned by experience how much to set it off horizontal.

[Joseph Noci 1Participant @josephnoci1]

Duncan, you are quite correct. I try now to do as you say – If the grind is just a 'touch up', I align and grind the secondary facet, and then re- align to do the primary, especially on the drills smaller than 3mm or so. If the drill end is bad, I hack it off-hand to be rid of the chipped parts, etc, then align and grind a secondary, and then re-align and redo the secondary, and re-align and do the primary. It sounds tedious but at least with this microscope jig its quick to align.

I suspect I ( you and I?) are/am being over-fussy, since the many 4-facet jigs built by many folk seem to work ok? gadgetBuilder et-al seem to have working devices and they do not bother with the error. I suspect though they are all just 'sharpening', not regrinding!

I guess it all depends on how much you are taking off of the tip.

Joe

[Neil WyattModerator @neilwyatt]

Posted by ChrisH on 11/01/2019 10:28:24:

Yesterday morning early my daughter was driving to work along the dual carriageway from Guildford to Alton and spotted a car head first into the ditch, obviously been there a little while as the windows were all frosted over.

She phoned 101 and they said yes, they'd had numerous calls re the incident already. So daughter asked if anybody was going to check if anyone was inside. Their reply stunned her. Yes, they said, they would do if they had anyone available, or if they had anyone driving by they would ask them to check it out. Absolutely disgraceful.

So what happens if there is anyone inside unable to summon help themselves? Tough luck it seems, hope they don't die before anyone can be bothered to check.

Moral of the story is, don't get into any difficulty and go off the road, at night and in freezing conditions especially, but if you do, don't expect help to arrive anytime soon.

Welcome to todays not-so-great anymore Britain.

Edited By ChrisH on 11/01/2019 10:30:11

A Scottish couple died after being left unfound in a car which had gone through a hedge a year or two ago.

I saw a car embedded in a fence near where I live in icy weather about a year ago. I stopped and there appeared to be someone hunched over the wheel. I opened the door to find it was an airbag, just as the driver got out the back seat and made me jump out of my skin!

Neil

[Colin HeseltineParticipant @colinheseltine48622]

Spent the day trying to use Turbocad Pro 2018. Took me all day before I could get a pipe flange to look vaguely like the video tutorial said it should. BIgger screen, newer eyes and not being Red/Green colour blind might help.

Colin

[ChrisHParticipant @chrish]

Neil – my point entirely re the Scottish couple, tragic we can as a country afford all sorts of vanity projects but not have the funds to properly fund our emergency dervices. Probably two unnecessary deaths there.

Can appreciate your panic when you came across your incident, would scare the life out of most folk, and you being such a sober stoic sort of bloke too!

Chris

[BazyleParticipant @bazyle]

About 70% of the membership turned up at EDMES for my talk on collets and adaptors which was reassuring. Plus a possible new member. I forgot to ask if he frequents the forum. Hi Craig if you do.

[Bob RodgersonParticipant @bobrodgerson97362]

Today I did some Model Engineering instead of Motorcycle Engineering. I did this for one of the members of our local society. It is a splasher for a 5" gauge Stirling Single to the Clarkson Design, I machined it so that the brass strip edging that would normally be soldered into position is left as an unmachined area whilst the rest of the part has about .015" machined off all over.

I had some difficulty generating the G-codes for both left and right hand sides however, perseverance won the day. I think it had something to do with the mirror image of the opposite side to produce left and right splashers and the heights selected.

I have the other side to do and also the front bogie splashers but these will have to wait for a while because holidays are due.

Edited By Bob Rodgerson on 12/01/2019 11:46:29

[DrDaveParticipant @drdave]

I have just received a parcel from Arc. I have been dithering over their one-shot oiling system for some time and, now the bits have been added to the clearance list, I finally succumbed to the temptation.

[EmgeeParticipant @emgee]

Posted by DrDave on 12/01/2019 13:00:20:

I have just received a parcel from Arc. I have been dithering over their one-shot oiling system for some time and, now the bits have been added to the clearance list, I finally succumbed to the temptation.

Is that for the F1 Dave ?

Emgee

[DrDaveParticipant @drdave]

Posted by Emgee on 12/01/2019 13:50:46:

Posted by DrDave on 12/01/2019 13:00:20:

I have just received a parcel from Arc. I have been dithering over their one-shot oiling system for some time and, now the bits have been added to the clearance list, I finally succumbed to the temptation.

Is that for the F1 Dave ?

Emgee

No, for my Myford. The F1 only has three oiling points (and an oil gun that is infinitely superior to the Myford one).

I think that the oilers might be a push fit (correct me if I am wrong) and the thought of stripping the mill, tapping the holes, cleaning & reassembling it makes me go weak at the knees!

Dave

[Jeff DaymanParticipant @jeffdayman43397]

That's great wok on the splasher Bob, nicely done!

[Robert Hurst 1Participant @roberthurst1]

Spent the afternoon pottering about, did a bit more welding on the frame for the 47, sharpened a couple of drills and made a new head for my Thor hammer. Didn't have a suitable lump of copper, so wound one out of some earth strap.

[Simon Williams 3Participant @simonwilliams3]

Looks like a good model of the Big Bang and the Spiral Universe.

HNY!

[martin perman 1Participant @martinperman1]

Today I removed the old motor off of my powered saw and fitted a new one so that I can get the blade to run the correct way. The old motor was not the original and the previous owner had removed two of the mounting holes from its frame, the new motor fits the plinth correctly but I did have to make a shaft extension to allow the pulleys to line up correctly.

This coming week I will get some grub screws so that I can fix the extension to the motor shaft, and then I will make a table for the saw so that I can use it in the vertical mode and in the horizontal mode.

Martin P

[Author]

Posts