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Member postings for Tom Sheppard

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

Thread: Newbie needs Advice
03/05/2021 20:50:35

One of the nice things about UGS is the visualiser which shows what you actually asked the tool to do rather than what you thought it was going to do. Use that and a standard text file to refine your design and you will learn a lot as you go along.

Thread: Magnetic swarf
03/05/2021 20:35:04

Yes, it is hung from a rope so it aligns magnetically.

Thread: Oofle Dust
03/05/2021 14:43:16

Youngsters cannot spell. It is and always has been "OOFLE!"

Thread: What Engine is this?
18/04/2021 14:32:12

Drop it in a drum of diesel and come back in three months' time. It will come apart nicely and probably go back together and run.

Thread: New car - or is it a wheeled computer?
07/04/2021 21:19:14

I scrapped the 18 month old VW because despite a wonderful engine, every other aspect of the car was so diabolically apalling, from the always being misted up to the woeful lights HVAC, positively dangerous roadholding and everything else it was so horrible I couldn't bring myself to sell it. I had it turned into an aeroplane tie down. The VW was replaced with another Mercedes but the quality was not up to "the best or nothing" so it went to be replaced with a current model Fiesta with every conceivable conceit. I love the stop start as I live in a town, The big powered mirrors, keyless starting, heated screen, comfy seats and effective HVAC make it easy to drive all day and the road sign recognition, navigation, phone integration, rear view camera and overall refinement (Synchromesh on reverse for example) make this little gem the final reason not to buy a classic car ever again. Keep your lumpy draughty noisy old bangers. This does nicely. A thoroughly modern Mini.

Thread: Soft soldering clearance.
01/04/2021 21:41:12

Job for 638 really, Steel will soft solder with the right flux but with the diameters you are using, I really wouldn't bother.

Thread: Can Loctite 638 really be this good?
01/04/2021 21:37:56

Yes, it can. It has pretty good gap filling and cures in the presence of metallic ions so surface area is a good thing. I have seen it do some things I would not have believed possible and would not think twice about trying it first.

Thread: Think you have trouble losing your chuck key?
01/04/2021 17:54:45

Isn't that a full size 26 2/3mm chuck?

Thread: Armadeal lathe
30/03/2021 18:20:10

I expect that it means drive. there are two types, brushed and brushless. The latter is desirable but bumps the price up between two and three hundred pounds so expect to be asked the question. I have an Amadeal brushless lathe but I haven't yet had the time to plug it in!

Thread: watchmakers lathe accuracy
16/03/2021 21:13:36

0.00004432951''', not 0.00004432951''. That is something completely different!

16/03/2021 20:32:40

To a watchmaker it measures 0.00004432951''' but one such will be sensible enough to use microns which are a proper measurement and coincidentally, what the dial is calibrated to.

16/03/2021 17:08:43

It is good enough to make watches with. It doesn't need to be any better than tha so it simply doesn't matter what its absolute accuracy is. The quality is in the hands that use it.

Edited By Tom Sheppard on 16/03/2021 17:09:28

Thread: A Certain Age
08/03/2021 21:47:59

Steam bent bamboo wrapped in carbon fibre tube electric scooter with regenerative braking and 25cc LPG four stroke range extending high voltage alternator feeding a switched mode charger supplying 120Volts at 3 Amps.

Inflatable luggage containers to reduce space required for storage.

But it isn't model engineering.

08/03/2021 20:02:12

As a newcomer here, the comments about the general unfriendliness of the ME community resonate, unfortunately. The fact that they will argue about fractions of nothing, often to the death over arcane examples of dead technology, (yes, steam junkies, I'm looking at you,) brings nothing to model engineering. Old men in sheds, one of which I am in danger of becoming are terribly boring when my company's apprentices grabbed the 3d printer and started mass producing PPE for the local hospital. Making copies of antiquities in small scale is old hat. Where are the new designs and projects? The Arduino and CNC modellers seem to be having a lot more fun.

Certainly the light aircraft homebuilt community, of similar demographic are more sociable and better humoured. Whether that has to do with the unforgiving nature of aviation, I don't know but after three months of looking in at it there isn't much for me in model engineering. Different strokes for different folks, I suppose.

Thread: How do I get the bearings out of this?
08/03/2021 18:31:19

The narrow end of the assembly has a circlip which is to prevent the shaft being pushed through the wide end. Remove it and the shaft goes thataway. Detach the cover at the wide end to ensure there is no increased diameter behind it.

Thread: WM18 - Broken it again :(
03/03/2021 15:26:31

In what way is a number of microswitches not an electronic brain? The principles were carried over into the 4004, " micro processor" which was created to run washing machines.

Edited By Tom Sheppard on 03/03/2021 15:27:16

Thread: Carb for single cylinder engine
01/03/2021 18:55:01

Have you considered replacing the carburettor with a simple spraybar as used in a model aircraft engine in order to establish a calibration datum? This would help you to get the engine running nicely before spending a lot of time going down a series of trial and error blind alleys to find a solution.

Thread: Would this improve the quality of signal to a CNC machine?
27/02/2021 17:09:59

Or RS-232.

27/02/2021 12:06:54

A digital signal is an analogue signal with only two or three levels. That is why it is called a digital signal. (Yes, if zero is a level, and it is, then digital signals can have three levels, but they are still digital signals.)

Thread: Chinese lathe
27/02/2021 07:37:37

The correct way to do sometthing varies between engineers and bogmatism doesn' t help. Nor does the blanket condemnation of products from China. The work produced on them gives the lie to that. A Myford is a thousand pounds and fifteen hundred with a new coat of paint but it might be knackered and how is a beginner to know? The Chinese equivalent needs work, all of which is explained in many tutorial videos, freely available. It is new and half the price. Accessories are readily and cheaply available and their availability brings many people into the hobby, most of whom don't have the space, money nor skills to get the best out of a ton and a half of toolroom lathe.

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