Here is a list of all the postings Farmboy has made in our forums. Click on a thread name to jump to the thread.
|Thread: Blown Fuse|
Finally found a reference here to prove my memory still hasn't completely failed regarding aluminium burning.
It clearly requires a particular set of circumstances, but I would suggest it is a possibility.
I would be really interested to find out exactly what did happen.
Edited By Farmboy on 13/08/2019 23:02:18
Just a further thought, pursuing the lightning theory: is the workshop supplied by an overhead power cable? Or is there anything else that might act as a lightning conductor in the vicinity of the lathe? Having asked that I'm thinking you should have felt something if it was a bolt of lightning while you were hand feeding!
Reading the original post again, and some of the answers, I'm more incliined to wonder if there might have been some sort of inclusion in the aluminium which caused a spark. I seem to remember reading that fine aluminium swarf/dust can ignite violently when suspended in air, although I have no experience of it. I still can't think of a connection between either event and the fuse blowing though . . .
As Phil says, it should be almost impossible for there to be a potential difference between tool and work . . . unless there was, say, a plastic sleeve protecting the workpiece from damage in the chuck jaws Even then the tool should conduct any charge away from the workpiece while it is cutting.
The metal-to-metal contact between component parts of the machine, including the bearings, should equalise any static charge build up. I'm not sure any sort of static charge would blow the mains fuse anyway as there should be no connection between that and the machine chassis. The fuse 'blows' when it passes excessive current in the live supply lead.
Very strange . . . can we asume you don't have a modern consumer unit with MCBs etc? If you did, surely this would have tripped out if there was a short-circuit anywhere in the power supply.
Just some random thoughts to throw in the mix . . .
|Thread: Floor Paint|
I may be getting over-cautious in my old age, but I would never use just paint or varnish on stairs since slipping on someone else's varnished stairs a couple of years ago, wearing socks without shoes. Still feeling the result of a very nasty sprained knee even now. Her grandson did the exact same thing the following day, but they bounce better at that age
I always make sure not to use those stairs without rubber soled shoes on now.
There are proper non-slip floor paints but I don't know of any in colours I'd want indoors
|Thread: A little rant about Emojis and their kin|
Anyone know what they're for ?
I can see the point of a little smiley face, winking smiley face, etc. to indicate the perhaps humourous intent of the sender and avoid some of the bad feeling generated in recent threads on here, but I'm not sure what any of the new issue would indicate to the reader . . .
|Thread: Electricity Supply|
But if we all move there, surely the World will tilt on its axis and Australia will end up at the south pole
To answer my own earlier question I looked up the energy equivalent of petroleum (crude oil) which the International Energy Agency defines as 11.63 MWh/tonne.
1 million tonnes of oil per week (total used for all transport) = 5,952 tonnes/hour = about 69 GWh.
Current UK demand on the National Grid seems to average around 35GW, so switching all transport from petroleum fuels to electric traction would seem to require an increase of almost 200% in generation capacity, although potential efficiency savings might reduce this figure. However, roughly half current generation appears to be from fossil fuels so we will need to increase generation by at least 400% from 'other sources' if we are to stop using petroleum fuels altogether.
I can't begin to imagine the changes my grandchildren will see, but our current systems will certainly need upgrading pretty soon if they are to have any hope of a decent life, even if my figures are inaccurate . . . which will no doubt be pointed out shortly
However you juggle the figures around, the UK apparently uses about 1 million tonnes of petroleum per week for all transport. plus almost another half million for other uses (according to Gov't figures)
Someone will no doubt be able to work out the electrical equivalent, but that sounds like a lot of gigawatts to me
Think I might start breeding horses
|Thread: Cutting a concave radius on the end of a round bar|
I think I would make a jig similar to what you suggest, but to fit on the lathe topslide and hold the 3/16" pieces horizontally at centre height at the 45 degree angle, then put a 1/4" milling cutter in a collet in the headstock to cut the concave. I'd be worried, like you, about the drill wandering in your proposed setup.
|Thread: Trends in Radio Ads|
I'd definitely watch that. I could even be that 'expert'
|Thread: Access Platform|
If you are not averse to buying one rather than making, it might be worth looking at this site:
I don't get on with normal ladders these day but I found these very stable and infinitely adjustable for uneven ground as well. I have the 'Junior' size which should reach the gutters on a bungalow. They aren't lightweight but they do fold flat easily for storage.
Someone better qualified than me will no doubt advise on your actual question
|Thread: It's not rocket science|
I seem to remember they 3D printed a spanner on the space station a while ago. Not sure if it was for a special job or just an experiment.
I bet those fancy gloves make working with fiddly things interesting, but at least if you drop something it just floats around. Not so good when you're working outside though.
|Thread: Workshop security - CCTV|
A piezo siren inside the shed might be quite devastating, but I'm sure I'd be the one to trigger it in a forgetful moment
My grandad apparently often caught the trip wire and set off the 12-bore cartridge alarm he'd set up in the farmyard, when he went outside after dark to check the livestock
Lack of illumination has never been a deterrent to the b@$***s round here but the neighbour with the snarling rottweiller on a long chain never seems to have intruders
Yes, that's been my experience too. And unless you have high-res cameras and floodlights so you get a decent colour image at night they are little use for identifying the intruders.
The last time we had night-time intruders in the yard the CCTV recorded their entry but the IR pictures were no use for ID purposes and they then ripped the camera off the wall before removing several vehicle batteries.
|Thread: Todays Mystery Objects?|
Still intrigued by this
Although I have no experience in that area I can see the argument for a supply drop 'chute, for the round one at least, but I wonder why the added complication of a lubricated swivel bearing. Surely it wouldn't be necessary in that case?
The shape of the square one is puzzling in that it looks as if the shaped corners might be designed to fit onto a four-legged frame of some sort, and the rims of the holes appear to be thickened, perhaps to avoid chafing a cord or cable passing through them.
Even more annoying is the nagging feeling in the back of my mind that I've seen something like the round one before . . . somewhere
If they're lubricated they must be intended to rotate freely.
If mounted on a post the grease nipple would be inaccessible.
The quick release shackle looks as if it is meant to fit on quite a thin ( 5mm? ) horizontal rod or cable which suggests it wouldn't support anything too heavy.
Some sort of light rigging or antenna seems a good bet.
Oh, hold on . . . Google thinks they may be earrings!
|Thread: SC4 Tailstock, Tangs and JT2 Drill Chuck|
A few points:
1. The tang is not there to stop the arbour turning, the morse taper does that.
2. The Morse Taper and the JT2 only hold under pressure, e.g. when drilling. If you twist and pull it will come out unless it has been forced tight by use . . . or a big hammer ( which is NOT recommended )
3. On the tailstock the Morse taper is released when the spindle is fully withdrawn, and the arbour may drop out.
Hope that is some help.
|Thread: Lead Bearing Solder is Banned|
If you sup your ale from a pewter tankard, apparently you should drink it quickly so it's not in contact with the metal for too long
|Thread: Solution found to the World's biggest problem . . .|
Basic principle of the Internet: If you repeat something often enough it eventually becomes true
My original comment was really a sarcastic poke at journalists who come up with amazing "new" ideas that most of us have known about for centuries . . . but it has prompted some interesting discussions about a subject close to my heart, as a lover of the countryside and wildlife.
Edited By Farmboy on 13/11/2018 23:30:52
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