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Member postings for John Paton 1

Here is a list of all the postings John Paton 1 has made in our forums. Click on a thread name to jump to the thread.

Thread: Yet another scam lathe sale on ebay to be aware of
11/01/2021 19:20:52

Do we have any members in that neck of the wood? If so the best solution is for them to invite their (local authority) trading standards officer to investigate, citing the information available on this thread.

They can act more effectively Ghan the Police at an early stage and, to be fair, Action Fraud are really seeking bigger fish.

Thread: Model tug boat plans
29/11/2020 12:44:19

When I built my tug I scaled off critical dimensions using proportional dividers but that can take a long time if wishing to transfer all hull lines.

I would now scan the plan and then vary the scale as I print it. Slight distortion errors creep in but only matter if you are pedantic over accuracy.

With electronic calculators now available I often take a proportion of the hull length on the drawing to the finished hull length I desire and then apply that multiplier to each dimension I require, measuring using a digital caliper.

However the easiest method for you (if you are prepared to pay) is to take the drawing to a decent architectural copy shop who will scan it ('digitize' and then print at any scale you desire using their plotter onto roll fed paper. It hlps if you draw a 'scale 10m length' on the drawing to enable a quick check of the final size and scale.

The first copy will be dear but if you need more than one copy their price starts to drop significantly.

If you know someone who works in a decent sized surveying or architectural practice they may be able to do the same for you at a cheaper rate.

Thread: Strange Word...
15/11/2020 18:13:45
Posted by SillyOldDuffer on 15/11/2020 14:34:46:
Posted by Nigel Graham 2 on 14/11/2020 22:24:04:

That book by the way, if not complete detours, is an eye-opener.

It contains instructions for making a basic ridge tent. Fair enough. And then a simple scow - then not content with that, a more boat-shaped rowing-dinghy (i.e. with a sharp end). No nonsense about asking your Dad to saw the wood for you - it implies just getting on and cutting it. Perhaps Dad was assumed to be busy on his Drummond lathe, or planting spuds. Then off to the local water with the un-plimmed craft and no life-jackets, for your Swallows & Amazons adventures. And when you return home, turn to the sweet-making chapter and make some toffee, now that sugar has come off-ration ( mid-1950s). No nonsense about asking your Mum to boil the molten sugar and butter for you... How did my generation survive?

Nigel's book from the 1950's is positively wet compared with my copy of 'The Handy Boy's Book'. Undated, but an advert at the back and pictures of aircraft reveal it's circa 1910.

The book describes how to make an X-ray machine, including the high-voltages needed to work it, and pictures a boy viewing his hand through a home-made fluoroscope. X-ray tube to eyes distance about 12 inches.

The model steamboat chapter recommends running the home-made boiler at 85psi. (Real men don't need boiler inspectors!)

'To Set Fire to a Newspaper By Merely Breathing On It' involves two chemicals, both independently responsible for a long list of accidents, and now banned because they're ideal for mad-bombing and terrorism.

As a normal boyhood activity the section on Wireless Telegraphy describes how to set off an explosive charge and recommends earthing the transmitter to a gas pipe. It doesn't mention the high-voltage dangers of spark-transmitters, or that the coherer used to fire the fuse reacts to thunderstorms and electric trams as well as home-made transmitters!

An influence machine and experiments with Leyden Jars are described without mentioning that wiring several jars together can be fatal.

The Book's not totally blind to health and safety: it suggests boys should never use Potassium or Ammonium Cyanide in their Butterfly Killing Bottles.

There were no Brylcreemed wuss-boys making toffee in 1910!



Yes Dave, I have that book too and marvel at the thought. I have another similar book showing how to make an aqualung using a gas pressure reducing valve as a regulator. I think both are attempts to capture a Darwin Award (for ensuring the foolhardy do not get to breed!).

How times change but I cannot help feeling that we miss something as todays youngsters appear not to be as extended in science and engineering.

Thread: Engraving Nameplates
31/10/2020 22:41:36

The other option is chemical etching brass using Letraset type lettering and ferric chloride to etch ( as for printed circuit boards) I have used this also for name plaques on models. It gives raised lettering which polishes up nicely against a matt finish background and the effect is especially good if the background is chemically blacked before buffing the lettering.

Thread: Help Needed to Identify This 5 Cylinder Radial Engine
27/10/2020 22:08:02

This thread has just made my week. It is so nice:

1.Enthusiasts helping each other

2. Heartfelt words of praise to the designer

3. Then the designers son pops up in the group and has clearly inherited his dad interest

4. To find that dad continues his interest into (presumably) a ripe old age

5. All benefit from the knowledge imparted

6. (If like me) so many cheered by the overall thread.

7. My heartfelt thanks to every one of you but especially to Richard and Matthew!!

Thread: Medical needles
24/10/2020 20:11:14

I use all the needles I can get for my 'micro flame' type fine work blow lamp as they quickly burn back if you get the flow rate wrong. ( the type of blow lamp that uses electrolysis to separate oxygen and hydrogen from demineralised water and then recombine them to give an oxy -hydrogen fuel which burns at high temperature without creating soot)

Thread: TurboCAD Layers & Dimensions - Help Please
17/10/2020 09:06:05

Ian T - well done you and nicely explained. I gave up trying to teach myself AutoCaD and spent two years of evening classes at the local college. Learned a huge amount and really enjoyed it. We spent hours working slowly through the basics and this was a vital discipline for me as I usually try to run before I can crawl and learn very bad habits as a result.

As a building surveyor often designing components as well as larger building works projects this was invaluable and such a smug feeling when sending your design to a fabricator who says 'yes I can Cnc machine that straight from your design' (laser cut stainless sheet,laser cut holes, folded to shape and joints machine welded. Very economic price for a run of 10 and unbelievable finished quality and accuracy.)

My primary learning was to totally change my survey methodology from that I had been trained to use, now needing to work with coordinates rather than vectors.

After that get to grips with model space and paper space ( not so intuitive but vital for setting scales and getting print out to scale)

Then the use of layers much as you describe but in architecture so useful for assemblies of components from different designs and suppliers.

I try to minimise the number of layers where I can as they can rapidly get out of control.

As you say the first layer is for setting out and so called 'construction lines' using colours so they can be identified for having that function. So useful for setting snap points such as the meeting points of adjoining curves with direct relevance for Cnc milling/routing

One layer for importing sub assemblies is good and certainly different layers for separate assemblies or machining operations would make sense.

I am just about to move away from AutoCaD (cost now I am retired) and start 3D modelling and machining using budget software. If there was a local college course I would use it, but that cupboard is bare so hope I can find some fellow enthusiasts locally so we can help each other.

I find a big aspect of the learning is how each individual persons mind works - cad probably suits a 'mathematical / black and white'mindset better than an artistic one and I should love to see how work produced on computer animation type models migrates to 3D printed objects.

Reworking scanned objects through rastered model forms and 'brushwork' modifications using say a tablet or touchscreen looks fun but may be alien to the engineers desire for micron accuracy.

All fascinating stuff and as is usual I am sure we have members who can help guide through all of this! There are talented stars on this forum, as well as highly trained and experienced individuals.

Thread: Hello - coming out of the shadows!
28/09/2020 16:33:19

+1 for Mdro and also Easson. Both have been very good for me. I actually prefer the magnetic readers to the optical ones though as they are rather more tidy - being more compact, they are also slightly less critical as regards installation tolerances. You can keep down costs by using optical where there is plenty of room.

Thread: Customs payment is it a scam
22/09/2020 10:29:05

Thanks for raising this David - it helps alert us all to such low life attempts to defraud (including the Chinese evasion of customs Duty which it would appear is rife!!)

Thread: varifocals
31/08/2020 21:15:32

I have a special pair of varifocals that have larger area dedicated to the two ‘closer focus’ filters and a very narrow band of long range.

useless for driving but excellent for careful workshop use and also for working my on the computer. I think they referred to them as task lenses or something to that effect.

31/08/2020 21:15:31

I have a special pair of varifocals that have larger area dedicated to the two ‘closer focus’ filters and a very narrow band of long range.

useless for driving but excellent for careful workshop use and also for working my on the computer. I think they referred to them as task lenses or something to that effect.

Thread: Electronics for the Cognoscenti
30/08/2020 22:38:17

It could prove an excellent investment should we experience another wave of Covid and renewed panic buying ( given the specification of the paper used - hopefully many sheets)

Thread: Elliot 10m shaper weight
13/08/2020 15:06:42

I had a 10M some years ago and transported it in a small car trailer.

I can confirm what Brian says about 'top heavy'. I had to strap it down very firmly. Thereafter making sure the tyres were inflated to 45PSI and taking great care over uneven ground and round bends.

Definately not a load to take liberties with.

I eventually sold my 10M as Id dint seem to use it very often.

My main use was preparing iron castings and removal of large chunks of metal before finishing with my (small) mill.

As commeted above the simplicity and easy of sharpening tool bits was its greatest asset for me.

Clamping could be a challenge as if the work can move it will.

Thread: Cleaning emergency !
04/08/2020 21:24:19

We have loose laid rubber backed washable carpet in our van and it works really well, even when we have the dogs with us. It can be taken out and scrubbed if necessary and is kind under foot. I turned yew plugs to fit the table leg sockets so that they finish level with the 'depressed' pile of the carpet.

The carpet is what is used for commercial venues and old folks homes where unfortunate accidents happen with regularity.

The sheet vinyl flooring remains below to help prevent spillages getting into the floor timbers.

Edited By John Paton 1 on 04/08/2020 21:25:35

Edited By John Paton 1 on 04/08/2020 21:27:22

Thread: Hi All.
22/07/2020 20:41:59
Posted by Phil McAvity on 20/07/2020 16:01:29:

Just a quick introduction from a former 'lurker' having just registered on the forum.

I'm new to model engineering although it's always been of interest to me, I often regret not taking the engineering path as a career having chosen the Army and Fire Service instead. I've always been interested in automobile mechanics with a sporadic sortie into the arena over the years and have returned more recently to RC Model aircraft now that time, family and financial commitments are less than in past years.

I plan on purchasing a mini lathe after realistically thinking about my needs and doing some research including online resources and reading the Nieil Wyatt book which led me to here.

Anyway, I doubt this will be my only post as I have too much to learn which even the magic of YouTube cannot fully explain!

Hi Phil, I seem to recall your namesake and another Scotsman Ben Doon featuring in Rag Mags back in the early 70s. Doubt you will see such publications ever again as most of the content would now now be taboo. Did you eventually qualify as a dentist?

Thread: Sourcing Belzona Fluid Metal Materials
07/07/2020 17:02:26

Good grief I didn’t know they were still in business. I last used their products in about 1976 and haven’t heard their name since despite being in the same area of work ever since!

Thread: Storage of files
12/06/2020 11:58:09

When rearranging your storage how about a quick spray paint of the handles to remind you which ones 'for best and brass' so that you don't mash them up on hard materials or clog them with alloy.

Thread: Jumping in
11/06/2020 15:12:45

Have a look at Geo Thomas book 'The Model engineers Workshop Manual' which has some excellent, well designed and very useful accessories in. He also gives such clear instructions on their manufacture that they serve as great beginner exercises too.

Thread: Damp proofing floor
11/06/2020 14:57:14

And watch out also for moisture coming up at the junction of the slab and the wall. Once you seal the top of the slab the concrete will end up being wetter than before so the moistire will tray and escape around the edges.

At best this will be a narrow band of damp but if the top of the floor slab is above the damp proof course in the wall the moisture can track across and migrate up the wall. Ideally the DPM on the floor should connect to the DPC in the wall. If it is at the same level as the floor surface then consider grinding a bit of a chase between the two , blow out any dust with an airline, prime with special primer and fill the crack with polysulphide mastic or other slightly resilient compound with good adhesive and water resistant properties.

If rising damp in your wall does not concern you (typically a bit of a tide line up the wall often with salt crystals) then don't worry about this detail but if you want paint to hang onto the walls or if there is timber there you will be well advised to look at the interconnection. It is a common problem and as Russ correclty points out there is considerable hydrostatic pressure which builds up one the slab is no longer able to 'breathe' to release the moisture.

The the detail you are adopting the slab will tend to have less thermal insulation value too but that is a minor consideration. Also use chemical (resin) anchors and non ferrous / stainless fixings if bolting down machinery etc as the floor will be relatively wet below the 'paint'.

All 'doable' but not as straightforward or reliable as having the DPM below the slab.

Thread: Look what I Found
19/05/2020 23:13:09

The asbestos was called 'Rawlplastic' if I remember correctly.

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