National Watch Cleaning Machine. Restoration and repair.

[Moose 30]

3 hours ago, m1ks said:

I think you'll find there are polarising views on the necessity of PAT testing for home use. 
Apologies, i'll get my coat.
Looking very nice and neat, looking forward to the first test run, will you be doing a video?
Also, PAT testing, it's one of those bugbear acronyms like PIN number, because, the T already stands for testing, yet we all do it, so we're saying portable appliance testing testing............(I suppose that applies acceptably to musical equipment, especially microphones?)

Yup for the video, all done and dusted. 

[m1ks 93]

2 hours ago, Moose said:

Yup for the video, all done and dusted 

Thank you very much, I certainly found it useful. In fact. Like that bloke with the shaving equipment I was so impressed I bought the co......... Erm one of them.

It answers another question I had which was to which rotational direction the basket spins. I wasn't sure if it was designed to force cleaner down or create a vacuum to sick such it upwards. Going downward makes sense logically as the debris stays low but you never know.

Thanks for the videos and that sounds impressively quiet in use.

[Moose 30]

Glad you found it useful. 

I was impressed at how quiet it was as well. For such an old machine, I sort of expected wear in bearings or something to perhaps create some imbalance and vibration, but no, steady as anything.

Certainly downward force on these older machines, but mostly nowadays they are automatic and bi-directional and as far as I know the “rotor” part does not exist anymore, so there is no imparting of a flow direction when it rotates.

I think for the average hobbyist, just using a machine, even of this vintage, is going to make a such a difference to cleanliness, that it won’t really matter.

still can’t wait to hear about you starting on your machine. I wish you well with it.

G.

Edited June 22 by Moose

[m1ks 93]

Will throw some pics in here as soon as I get it. 

[Moose 30]

I would particularly be interested in viewing the rheostat. I have a theory about the later editions of the model 1, like yours, with the additional on/off switch for the motor.

My thinking is that they changed the design of rheostat which necessitated the addition of an on/off switch, as the new version did not have an “off” position, like the one originally fitted  in mine.

[m1ks 93]

No problem. I'll get some pics and if there's anything specifically you want to see in detail let me know.

[Moose 30]

But will Elma attachments fit the Lanzetter National?

(No...) 

The problem is simply size related. Whilst the two baskets look to be very close, the measurements are different enough to matter. Now - IF I had a lathe, and IF had the inclination...

In these photos you can see the size differences.

The inner diameter of the Elma baskets are 64 mm. The outer diameter of the National attachment point is 67 mm. Also the wall thickness of the Elma basket is only 2.2 mm, so there is insufficient thickness to be able to reduce it to allow the National head to fit, as there would be insufficient material left to provide enough strength.

As can also be seen, unlike the Elma Basket arrangements, the National basket holder and impeller, are both an integral part of the shaft. The Elma basket holder attaches to it's motor shaft via a metal bush and grub-screw, so it would need more "metal bashing" in order to fit an Elma Basket support to the National motor spindle.

Now - If I had a lathe, and IF I had the inclination, it should be possible to either:

• Turn down the National basket support to fit the Elma basket holder. After all, it only needs about a mm or 2 taken off to fit. But - I would have to remove the 3 mounting studs during turning and then likely re-drill the newly-turned basket support to fit new ones. OR,
• I could manufacture a new shaft for the National, bored out at one end to fit on the motor shaft, and turned down to fit the Elma Basket support. (I think someone actually did this, in another post on here somewhere.)

But I don't have a lathe and, crucially at the moment anyway, also do not have the inclination. In any case, we are currently packing up to move house by the end of the month, so it would in any case, have to wait until after we were settled, until I decided if I was tackle this, or just leave things as they are.

Anyway - there it is for anyone else wondering if these things might fit...

(Anyone want to buy a surplus to requirements Elma Basket holder?) 

[m1ks 93]

That's a shame, I'm planning to 'heath robinson' some dividers for my main basket, probably from good old poundland tea strainer mesh because it's the only thing on the machine in not overly happy about. One large open basket for the heavy bits to roll around in.

The current idea is a straightforward cross piece or 3 sectional which will simply drop in. Hopefully it will be adequate enough for separating parts and stopping them bashing each other.

Cleaner and rinse first though and recover from my holiday break before deciding which practise movement gets the first try.

[Moose 30]

That sounds like a good idea. I have a very fine mesh colander which is big enough to get quite a bit of mesh material from to fashion dividers.

But, I also fancy a bit of a challenge. Once I get moved I will see if I can manufacture a shaft. I have a mate with a lathe and I’m sure he would let me loose on it for the usual “consideration”. It also depends if I can get together the Elma bits at a lot less money than they seem to be advertised for. On the plus side, I already have the basket holder...

But, it will have to wait till the move is over with and I’m settled again.

So I’m keeping my eyes open in the meantime. And, my wife’s colander may well bite the dust in the meantime.