Here is a list of all the postings Roger Head has made in our forums. Click on a thread name to jump to the thread.
|Thread: The more we look at space the weirder it gets..|
Actually, I thought we (sol) were at about 65deg wrt the galactic plane?? Not certain, but just look at the angle it makes across our sky at night.
Or I might be completely wrong!
|Thread: Preventing Rust|
Martin, what is the thinking behind mothballs and rust prevention?
|Thread: Old lathe on Ebay|
Or the classification 'Used' on a fifty or hundred-year-old item.
|Thread: Mitsubishi Boring Bars|
Thanks Neil. I've never had a problem with EZ Laps separating, but they do load up fairly easily (especially the super-fine), so I generally have a little pot of kerosene and a toothbrush on the bench. I use them for touch-ups on HSS and brazed carbide tools that I reshape with a diamond disk in a Dremel-style tool.
That's a nice-looking tool Neil. What wheels do you use (size & grit) for grinding such small features?
|Thread: Name plates|
Thanks Mark. I was afraid the story was going to be something like that - plain blood, sweat, and tears. It must have taken an age for the scraping-back and touching up!
+1 for talent and perseverance.
You're right about toner variability. 15+ years ago, my Laserjet 4MP would produce the most solid black infills that you could ask for, and it was possible to create 6mil / 6mil trackwork interspersed with large power and ground areas. But it grew old and I eventually replaced it with a Brother 5350 - great for normal printing, terrible for pcb artwork. Apparently the toner that Brother use is different to the earlier toners (according to something I read in one of the pcb forums). Certainly it isn't a patch on the LJ4.
|Thread: Mitsubishi Boring Bars|
Interesting, Danny. Do you have any idea of the price?
|Thread: Ferrous cleaning wheel for my bench grinder?|
Thanks for that, Harry. And that link is really useful .
Harry, that's a useful note if your memory is correct. Do you recall if the 'reversed polarity' period was of the order of seconds, minutes, or....?
|Thread: Mystery tool|
Thanks for the link Mike. In particular, I found robjon44's description very useful. They sound exactly like a quick 'first project' for 2017.
|Thread: What Did You Do Today (2017)|
Bl**dy hell, David, I haven't finished last year's yet .
|Thread: Name plates|
Hi Mark, that plate looks really good . As you say, getting any real depth of etching consistently is very difficult, but if a shallow etch is acceptable, then getting sharp, high-resolution linework is quite straightforward.
I am particularly interested in the red and black infill that you have achieved - could you please give us some details on your method and materials for achieving that, and also some close-ups of the finished plate.
My 13 x 40 has no plate for the threading dial, only a table (in a poorly photo-copied manual) that looks like it was scratched out by a one-legged chicken clutching a blunt pencil! That page in the manual is now deteriorating through constant reference, so I've been 'thinking about doing something' (i.e. procrastinating) for a while.
My only experience with chemical etching is making pcbs for electronics (I've made hundreds over the years), so it's all shallow etching. To obtain 1/16" deep etching of acceptable quality (clean steep edges on your lettering, lack of undercut, etc) might not exactly be a doddle in a 'kitchen-table' type of setup.
I'd suggest a reasonable bit of googling first, and enough material for lots of testing. I'll be happy to be proved wrong.
Just my two cents...
|Thread: Free Shipping .... of a turret mill !?!|
I give up on trying to understand their numbers. It sounds attractive, especially to someone in the market for such a machine, but Michael W 's post says it all;
Free shipping - to where, exactly? (into my workshop?; to the nearest FedEx depot?; to the nearest port? )
Errr, well, no, that meant ....
And a guaranteed delivery time of 23 days??? - Fine, if it's in-country, but otherwise...
I could imagine a lot of hassles. But then, a simple click on 'Contact the seller' might immediately resolve everything .
Maybe I'm being too critical. Maybe the listing just needs a bit of work on its presentation to be more convincing.
Yes, certainly a strange one ...
Seeing as it's free shipping anyway, maybe it will come in bits'n'pieces - a knee here, a column there, etc. All just nice 500kg bite-sized bits. Sort-of Ikea style, with an Allen key and a stamped spanner - "Some Assembly Required".
And yes, David, the coupon would be most welcome...
PS Michael I just re-read your post - earlier today I had changed the country selection in the shipping tab and it seemed to show free shipping everywhere, but always by FedEx or TNT. UPS was always $127k (although generously marked down ( "You save: US $508,200.03 (about 80%)" ).
Maybe they should spend their $5 coupon on a new calculator
Edited By Roger Head on 27/12/2016 14:45:38
Only God and Google know why, but, when searching for a particular stepper motor, Google threw up this_link . My first thought was 'Wow, $2000 for a Bridgeport-style mill'; my second thought was 'Crikey, free shipping to Oz'. Then I nearly sprayed my cornflakes over the desk when I saw the UPS shipping charge - $127,050.01
All the prices are in USD of course, but ignoring that, and ignoring considerations about possible quality concerns etc, it struck me as a strange commentary on our modern world that you can advertise a 1250kg brand new machine tool with free shipping across the globe at such a low price.
Note the package size; 5m x 5m x 5m. There must be an awful lot of bubble-wrap around it .
|Thread: Which grade of Locktite to secure threaded brass to Aluminium?|
+1 on the "act quickly" if using a catalyst.
Preferably do a test piece first - identical material, surface treatment, etc. Some years ago I came within an ace of screwing up a mega-expensive job. New bottle of retainer, new activator, and I reckon I had ~10 seconds before it was good-night. I had another three to do, so I made a jig that allowed me get the joint together and adjusted well within that initial cure time. Really worked well, though. The have survived ten years of rugged shipboard and underwater use without even a hint of a problem.
|Thread: DuckDuckGo [search engine]|
It's not bad, but it still shows using + for required inclusion
Bottom of page --> Last Updated: May 31, 2016 12:45 PM
PS The menu (top left) of the linked page is useful - The Google Lesson Plans takes you to
where there is a link to some searching lessons, but there is also a link to a Google Power Searching course
on which there is also an Advanced Power Searching course link.
If I have some time tomorrow I might look into those.
Edited By Roger Head on 19/12/2016 13:36:18
Yeah, ok Michael. You'd think that search engines would be providing more capabilities as time goes on, not stripping them away. IIRC, Alta Vista had near, and maybe some other selection about where in the page a hit needed to be... (not sure about that, it was a long time ago).
Some (even very elementary) scripting capability would be really useful.
|Thread: Euro space station|
For 20 or 30 years our holidays have simply been ocean cruises for a few weeks, out and about in the South Pacific. I like it because it's a means of getting away from the world, family, grandkids, etc. My wife loves it also for the same reasons, but the last few years she keeps nudging me about how much she would love to see the northern lights. I suspect that pictures of the NL might be like pictures of colourful nebulae, gas clouds, etc i.e. beautiful by timed exposure, but perhaps less impressive to the naked eye.
What is the truth?
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.
Click THIS LINK for full contact details.
For subscription issues please see THIS LINK.