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Member postings for Martin W

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

Thread: Post Office Deliveries
16/09/2021 12:50:25

We have not had any problems/delays with deliveries of letters and parcels in the Reading area of Berkshire. I have never had problems with small/medium parcels on their 48hr tracked service which I think is excellent value for money, now they will collect from your door for a small fee. For large/small letters and small/medium parcels I wouldn't consider going anywhere else. That said the local DO is close and convenient.

MartinW

Thread: Anyone know what machine tool maker uses this emblem?
31/08/2021 11:43:59

Had a look in lathes.co.uk and while there were several manufacturers with the initials JW or WJ I could not find one with this logo/emblem.

Martin W

Thread: Something to spend your pocket money on
28/08/2021 00:08:52

I always find collections at auctions a somewhat bitter/sweet affair. It invariably means that someone with a passion and/or skill has passed on and what they have made/collected is being split up, hopefully to buyers who really appreciate how much effort and skill that went into assembling that collection in the first place.

That said there are some superb models there which deserve to go to a good home.

Thanks for the pointer Jason

Martin W

Thread: A SIMPLE POINT !
27/08/2021 13:56:04

Only if they were being fitted by the company drip smile p.

Thread: Age and Realisation
24/08/2021 00:37:10

I would love to take something like that on, however I know that I have neither the skills nor the staying power to complete it and as I am in my late 70's probably would be pushed for time.frown

I hope that both projects find a good home and get completed with the same level of skill you have shown in all the engines etc. you have shown in threads on this site.

Martin W

Thread: Faulty Sieg C0 Lathe
23/08/2021 00:31:56

Paul

If you do want to pursue the restoration of this lathe then you can quickly check the speed control board by replacing the motor with a 80-100W filament bulb and varying the speed control pot. If the intensity of the bulb varies uniformly from dim/off to full brightness with the adjustment of the speed control pot then there is a fair chance that the speed control board is OK. Depending on how badly bent the lead screw and cross slide screws are bent there is a good chance that they could, with care, be straightened enough to check basic operations. What could be a problem is damage to the head, chuck spindle, chuck and head bearings though bearings are relatively cheap and can be replaced. The original sheet metal work can either be hammered into submission/shape or bits fabricated and bolted/pop rivetted in place.

If you do take it on as a project then good luck and I hope you get a working lathe.

Martin

ps:

The motor can be checked by connecting it to a low voltage DC supply, 12/24V, and if it spins up and rotates freely and evenly in both directions then it is likely to be OK

Edited By Martin W on 23/08/2021 00:35:51

22/08/2021 19:11:57

Paul

What part of the country, hopefully UK, are you in? Nearest large town will be fine. There might be someone in your vicinity that could help you out even if it is only to confirm that the lathe is beyond sensible repair.

Martin

Edit; rewording

Edited By Martin W on 22/08/2021 19:13:46

Thread: Design Award
18/08/2021 00:55:30

Great for dusting/painting the ceiling near the walls but useless once away from the wall for support. So then its back to a hop up to complete the job so why get one in the first place when one has a hop upfrownfrown? Could be used as a wishbone for tug of war teams Christmas outingswink 2. Might be useful as library steps but doesn't look that stable, health & safety wouldn't like it, especially if you have an armful of books to shelve but then libraries have purpose built stable moveable steps already.

Window cleaners often use short triangular shaped ladders, to access higher windows, with a few steps. This just looks like a cut down fancy version of one of these, no doubt with a very fancy price tag. So in no way something new but just a copy of an existing piece of equipment.

Cynical rant over.

Martin W

Edited By Martin W on 18/08/2021 00:57:34

Thread: A robot of many colours
12/08/2021 01:05:01

Thanks Michael, interesting article and one wonders what it will lead to in the future. Don't like the colour/pattern of your wallpaper/paint then just get sample for it to match to and voila a redecorated roomyessmiley. As you say significant military potential and as the colours are defined by temperature it could also break up an IR image to make it less identifiable though IR camouflage is already an established process for concealment.

Martin W

Thread: Can one buy pliers with parallel jaws that lock like mol
30/07/2021 18:37:13

blushblush And I thought it was a wind up!!!!

30/07/2021 17:37:40

Methinks pgk may have a vested interest in this unique design. That said it is an interesting combination of approaches to solve a problem and must have been relatively difficult to blend these designs into an apparently functional unit. I look forward to developments that may be forthcoming that could solve as yet undiscovered problems.

Martin

'Martin K'

It wasn't so much getting ones teeth into a problem as getting the remains of strangers teeth from the burrs!!!!

30/07/2021 12:38:17

Used to scrounge used burrs and diamond drills from my dentist before his demise. They have come in very useful at times for a variety of projects. Yeah I know 'Off Topic' but pertinent to the posts immediately prior.

Martin

Thread: Fulfilled by Amazon
18/07/2021 00:58:23

OOPS

Yes Phil 30mA is correct, my excuse is I was typing too quickly and reading slowly!! Thanks for the correction, 300mA would be a trite too exciting for the recipient.

Cheers

Martin

17/07/2021 19:02:12

RCDs work by detecting any differential current between Live and Neutral and when this exceeds a preset level the unit activates and disconnects the mains supply within a specified time. Therefore if one touches a live wire and their body completes a return path i.e. damp shoes and wet grass then the unit will trip if the current exceeds the specified maximum which is nominally 300mA. This provides protection for the user irrespective of whether the system is two wire or 3 wire.

There is a popular misconception that these units work by measuring current flowing in the earth wire. Earth wire current is not measured by RCD units, in fact the earth connection totally bypasses the active circuitry of an RCD.

 

edit: Last para

Edited By Martin W on 17/07/2021 19:09:31

Thread: Map Scale mystery
30/06/2021 14:28:04

Michael

Is that 34min 30sec east or west of the Greenwich Meridian as was. devil

Martin W

Thread: Surface finish when turning.
27/06/2021 01:10:00

All the gibs tightened/snugged up, half nuts clean and locking firmly, gear train driving the lead screw clean with no swarf/muck in the gears? Can't think of anything else other than obvious problems like tool chatter/spring, spindle bearings, belts etc.

Thread: How Elgin made Jewels for Chronometers
23/06/2021 11:02:13

Thanks for that Michael, no wonder that jeweled chronometers were so expensive to produce in those days with so much manual input required just to produce the bearings let alone the rest of the instrument. All I can say is thank goodness we don't live in the same world today. What with naked flames, exposed moving parts on machines, toxic/corrosive chemicals, and no PPE modern day HSE would have had a fit.

That said it is always interesting to look back to see how things were done, especially in times of need. Workshops with banks of lathes and their operators are now a thing of the past with cnc machines each producing more output and to a far higher standard than those workshops, progress yes I think so. You only have to look at modern car engines that run for over 200,000 miles and other than having a regular service never needing to be worked on.

Thanks again Michael for another interesting look at the world.

Martin W

Thread: Flintlock pistol plans
19/06/2021 10:15:44

OOPS

Sorry for my digression from topic Bob but the memory flashback reminded me of the fun we had as kids. That said I am glad you were entertained by the diversion.

Mick B1 that just raises a lot more memories, but nuff said for now.

Martin W

19/06/2021 00:39:21

Noel

Probably a blessing that I wasn't aware of the existence of rocket rook scarers when I was younger as my digit count might not be the same as it is now, a full set.

Martin W

18/06/2021 17:08:09

Buffer

That takes me back 50-60 years to the wilds of Wiltshire and bangers, bird scarers, on a rope. They certainly had a lot more thrutch than any legal firework you could get your hands on. Different times with different rules but we had a lot more fun it would seem and didn't harm anybody except maybe ourselves occasionally.

Thanks for the memory.

Martin

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