Here is a list of all the postings john fletcher 1 has made in our forums. Click on a thread name to jump to the thread.
|Thread: Motor wiring|
It's not easy to reverse some of these motors. As you say you need to reverse either the start or run winding, just one NOT both. I have had a few similar motors in pieces and one thing to note is the centrifugal switch is at the drive end. The capacitor is the clue as it is in series with the start winding so one end of the start winding is available but the other end takes a bit of finding if at all possible. I hope your motor is rotating in the correct direction and doesn't need any alterations. John
|Thread: Current leakage om CNC|
OK about bonding and earthing, but where is the electrical leakage originating from, that needs eliminating. Testing with a simple continuity tester is not good enough, PAT testing we go a long way to proving the earthing is effective or now as it known as the CPC circuit protective conductor.
Hydraulic fluid as used by farmers, earth moving equipment and fishing boats is OK.. Nutto H32 is recommended by Myford. There are equivalent s by other fuel companies. Ship chandlers sell it by the litre if you take a long a empty milk container for about £2. John
|Thread: Bridgeport Help|
Hello Mike, send me a PM as I have an address of a man who may be able to help you. John
|Thread: Loco at Marshalls Works 1906|
At a recent club meeting at PEEMS we had a very interesting talk by Bridget Laycock who is extremely knowledgeable on Marshal tractors in particular and the works in Gainsborough, in general. Bridget had lots of photos also, there is often references and pictures of Marshall traction engines in Old Glory magazine.
|Thread: Power feed for mill table|
It would appear that your power supply isn't adequate for the job. Try direct running using a 12 volt car battery just to really establish that it's not the motor. John
|Thread: Aldi type bench drill|
A few years ago I had a similar drilling machine, with a similar fault. The was a good article in ME 19th May 1989 page 621. I followed the instruction and what a difference it made to the machine, well worth doing. If you have any problem send me a PM with your email address
|Thread: How hot does the motor on your mill/lathe run?|
Most modern motors run very hot when compared to older one when natural resin based insulation was used. Out of interest and I'm sure some one will correct the following if I've got it wrong. We used the following to assess the internal temperature of the winding of a motor after a run.. Example, measure the winding resistance before the test run, note ambient temperature as well. Run the motor say for an hour, then measure resistance again. If original Res was 20 ohms, and new 26. Divide the second Res by the first = 1.6, subtract 1 from 1.6 = .6, now divide .6 by .004, that is the temperature change, which should be added to the first temperature. I have one of those laser gun type of temperature measuring jobs, which I find very handy for about £6/7, from ebay. John
|Thread: Bandsaw blades|
Yes Wadkin did make or just supply a band saw blade brazer, for their large band saws, we had one at work. If a centre needed to be cut out in a large piece of wood, the machinists cut the blade, poked the blade through the hole, which had already been bored in the wood, then brazed the blade up again and carried on working. I silver solder blades as outful doger does above. Not always successful, but one can use up odd parts of blades that way.
|Thread: Wasp trap - suggestions please|
We need wasps and other creepy crawlies to pollinate the crops. For far to long we have been poisoning these creatures, which we desperately need . Those farming lot over the pond now have to move bees hives around by the lorry load to pollinate the crops, simply because they have been busy with the chemical sprays for many years. If we are not careful it will be same here. A few people get stung every year and I'm one of them, not nice but you soon get over it.
|Thread: strange power socket|
On "Vintage Radio" there members who collect socket outs and have a lot of info/dates about when and where they were first installed. Should any one need any info about AVO meters, Vintage Radio is the place to go, circuit diagram / help on repairs etc readily available. John
|Thread: Home built trailer|
I have an old book called Your Complete Guide To Trailers and Towing published by Indespension who made the wheel units etc, a useful book if you can obtain a copy.Some years ago a friend of made his own flexible suspension rubber units, using some square section tube, four circular length of rubber (rod) and a shaped steel piece to fit inside, which he made himself. I think he had seen the Indespension units being made. However, he put the lengths of rubber in his freezer, then later pressed them in place, together with the steel piece.My friend made a few for his mates, they seems to work OK and never heard of a failure. Not at all sure about modern legislation reading trailer. Not many home made looking trailers at car boot sales or auto jumble sales. now days. john
|Thread: How to wire if forgotten, Myford help me.|
Hello Gary, that is an excellent article which you refer to, I've never seen it before.I hope you now have sufficient information to get your lathe running. Its a good idea to get your electrician friend to check thing out before switching on. John
|Thread: Dam Solution?|
Re Hydraulic rams there was a good article in ME a few years ago, on making a ram using plastic pipe and fittings. I think it is a large volume of water moving a small volume, John
|Thread: my work|
Hello Phil, have you thought about joining or even forming a REMAP group, they make or repair all sorts of gadgets for disabled, you'll see their advert in the back cover of MEW magazine, they NEED folk like you Then there is being a helper with many of the groups/ clubs who help out at OUR age groups, such as Stroke Club, Parkingson etc You would meet some very nice people on the way and possibly have some day/meals out.. There would still be time to make swarf. John
|Thread: What started your interest?|
Hello Anthony, I have a friend who is selling the contents of his workshop and wondered if you need any thing. If you do please contact me via a PM . John
|Thread: Surplus subjects learnt at school.|
How fortunate you all seem to be. I was a boy in WW11, at school we had old ladies out of retirement, who didn't know much and taught us kids less. they fell a sleep in front of the open fire in the afternoons and woe be tide you if you woke them up. Don't remember 11 plus either. With only the three Rs before joining, I had my education in the army, hated it but turned my life around. Spent two horrible years in fly blown Egypt, the electrical courses I went on were good. In the end, so was the pay, which was linked to ones technical achievement. John
|Thread: Faulty LED|
Have you got the polarity correct. Leds are diodes, so must be connected correct. Try using two piece of wire and your 12 volt battery together with your Leds, first one way then the other, if you see what I mean. John
|Thread: Angle grinders - Dangerous or not|
Definitely dangerous. one has to really concentrate when using an angle grinder. But what a useful tool they are, I've rescued lots of pieces of steel to be used again, thanks my angle grinder. You mentioned safety clothing etc,I would also included ear defenders, what a racket they make when cutting, definitely not to be used on a Sunday , I was once using my angle grinder and the sparks hit a discarded double glazed window used as a garden frame and imbedded themselves in the glass. .John
|Thread: Using a Metal Cutting Disc on the SX2 Mill|
It might be worth fixing a couple of powerful magnets from old loud speakers in plastic bags line of fire, to collect some of the debris flying about. I have one of those welders angle magnets in plastic bags below my metal cutting band saw, which collects up the metal debris. From time to time i remove the magnet from the saw and pull the magnet out of the bag over the waste bin. I do the same when machining cast iron on the lathe or mill, works a treat.
Off subject, Cast iron filings/chipping can make a MESSY but simple toy for children. to play with Two clear plastic trays back to back and one above the other, the lower one has a magnet inside whilst the top one has the cast iron filings in. Carefully moving the magnet around produce interesting shapes, be care not to spill any filing as they are really messy. John
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