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Member postings for blowlamp

Here is a list of all the postings blowlamp has made in our forums. Click on a thread name to jump to the thread.

Thread: Suggestions please Vol2
05/04/2011 22:18:53
Another go at this.
1/ Sit the completed unit on the milling machine table.
2/ With a pointer/probe mouted in a drill chuck, position the table and lower the quill, or raise the knee until said probe just touches a suitable reference point on one of the arms and note the reading.
3/ Repeat this operation several times, by spinning each arm into position, to get a good average reading of level for repeat accuracy.
4/ Make suitable adjustments as you go.
 
I think this method is almost immune to outside influences such as an unlevel machine table etc.
 
Martin.
05/04/2011 18:21:19

If I understand the problem correctly, then provided all the arms are at an accurate 90 deg to one another, you could attach a weight to one of them (à la plumb bob), and let it find it's own level.

 

Martin.


 

Edited By blowlamp on 05/04/2011 18:22:33

Thread: Suggestions please.
31/03/2011 10:26:35
 
Martin.
29/03/2011 15:20:41
Has anyone contacted The National Physical Laboratory yet, to see if they can help?
 
Martin.
28/03/2011 22:13:58
If you have a rotary table and milling machine, you could make a simple jig from MDF or plastic etc with a couple of 29 deg slots to hold the cutter and present it to the grinding wheel in a predictable manner.

It would be easy to regrind the tool if you need to as well.



Martin.

Thread: Acceptable runout
26/03/2011 18:49:17
NOOOOOOOO!!!!
Quit while you're ahead - it'll just distort all the hard work you've put in for very little practical benefit.
 
And you shouldn't be smoking cigarettes at your lathe - a cigar would be much more the order of celebration for a job well done.
 
Martin.
26/03/2011 15:59:22
I think most people would class ~ 0.0015 mm, or 60 millionths of an inch radial deviation from centre as a success.
Merely leaning on the cross slide while checking for runout will show far greater movement than this.
 
 
Martin.
Thread: Amateurs
24/03/2011 19:36:19
He's got this place buzzin' !!
 
Martin.
24/03/2011 09:08:01
Donald.
 
Taking your example of there being only 1 correct way to turn a Morse taper.
 
Surely the correct way would be to use a Taper Turning Attachment.
 
This is my preferred method, given that if more than 1 item needs to be made, then repeatability of the taper angle can not be guaranteed between centres, simply because each blank will vary in length and so will the depth of it's centres.
 
Personally, I find the 'test bar' method of resetting the tailstock to be unreliable for close accuracy and find that a test cut on some scrap to be a much better way of returning to a parallel setting.
 
 
Martin.
 
 
23/03/2011 19:16:03
Welcome aboard, Donald!
 
Martin.
Thread: Boxford cross slide dial grub screws
22/03/2011 11:27:53
I'm not at my machine at the moment, but I think it should have either a couple of brass slugs or ball bearings in there.
 
 
Martin.
 
 
Thread: The boat that Guy built
20/03/2011 11:34:11
Posted by John Stevenson on 20/03/2011 11:27:56:
Love here or hate her she was the only person who stood up to the unions.
 
I'd hate to think of where we would be today if we had the unions AND Health and Safety.
 
John S.
 
 
 
John.
Could it be any worse?
 
Martin.
20/03/2011 11:28:17
Hi Terry.
 
I'm not trying to speak on behalf of Graham, but I think he was highlighting just how much he despises Mrs Thatcher's actions during the 80's, by comparing his feelings against yours.
 
If that's the case then it's perhaps an example of where a suitable Emoticon could have been used to good effect.
 
It's just my view, but I hope that it makes some sense.
 
 
Martin.
19/03/2011 00:22:16
For those that remember them, some of the BBC's Horizon and Channel 4's Equinox documentaries made for excellent viewing.


Martin.

18/03/2011 19:37:54
There also seems to be a belief with many of the programme makers that if we're not singing, dancing, or laughing, then we can't be having fun or enjoying ourselves.
 
I've also noticed the 'fear' of the producers of anyone having a meaty chat about things mechanical as it's always done in a jokey way, as if it's too painful for the viewer otherwise.
 
It is interesting to see how they're trying to remind the population of our manufacturing past and I wonder if those in charge are hinting at what we should be doing now, with programmes like this, along with the very interesting documentory Britain At Work, which is presented quite nicely by Kirsty Young. After all, now it's so expensive to buy a degree, many school leavers may need to go back into manufacturing whatever we can.
 
 
Martin.
Thread: Mystery Tools
06/03/2011 13:22:00
It's hard to tell for sure, but the last pic looks like it could be a Spade Drill.
 
Martin.
Thread: Trouble posting to forum!
23/02/2011 00:13:23
Peter.
I'm using Windows 7 along with Internet Explorer 9 (release candidate) and am really quite pleased with the combination.
I'm not a 'fan boy' of Microsoft, but I appreciate the free lifetime support and updates of their operating systems, as well as their other totally free stuff, such as Security Essentials, which is a virus/spyware protection application and I'm finding it to be as effective as anything else available, without slowing the system.
 
I started a thread about what I consider to be the deficiencies of this site with regard to things like attachments of files and pictures etc.
 
 
 
Martin.

Edited By blowlamp on 23/02/2011 00:14:18

Thread: Moving photos between albums
02/02/2011 16:21:05
I can't help with your query, but just in case you didn't know, you should take care if you have previous forum posts with pictures that reference back to your album(s) here. Moving pictures from an album will cause that picture to be erased from your post too.
 
Martin.
Thread: Help Please
30/01/2011 15:10:07
+1 for Super Glue. It's great for split finger nails when the fracture goes down to that bit that really hurts and you keep catching it on clothes and stuff.
 
 
Martin.

Edited By blowlamp on 30/01/2011 15:10:21

Edited By blowlamp on 30/01/2011 15:10:51

Thread: Time for new forum software.
29/01/2011 14:59:59
My point is that the lack of facilities here, coupled with the faults in formatting are largely not issues at other webites that I visit. Also, I believe IE9 will become the next standard - whether we like it or not - in the same way the other IEx's have been in the past.
 
Martin.
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