Building a slot machine from scratch? You're not alone in your madness.
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wembleylion
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Re: Bryans Worlborl

Postby wembleylion » Tue Jan 07, 2014 10:20 am

Thank you for the information, Mr.PM; your photo of the complete machine is very helpful. !THUMBS! It shows the pin positions below the ball release hole really well and this is something I had been pondering about for some while.
It's such a shame when all the effort that goes into the works of a machine is spoiled because somebody thinks stained pine will pass for good old English oak.
I agree, unless cost is a consideration then why not have the best, after all the same amount of work goes into making the case regardless of whether it is knotty pine or oak.
I find oak much easer to work with less chance of splitting the wood during machining than with softwood and of course there is greater satisfaction derived from producing a quality product.

John

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wembleylion
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Re: Bryans Worlborl

Postby wembleylion » Wed Jan 15, 2014 12:02 pm

I have managed to get a bit more of the Worlborl done.
I said in an earlier post that I would have to make the operator plate in three sections; this is the first part completed.
Worlborl-Progress-4.jpg
John

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JC
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Re: Bryans Worlborl

Postby JC » Wed Jan 15, 2014 3:44 pm

Excellent work, John !THUMBS!
I guess the profile was CNC machined or laser cut, but how did you achieve the relief work - was it spark/wire eroded or was it also machined?

Jerry

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wembleylion
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Re: Bryans Worlborl

Postby wembleylion » Wed Jan 15, 2014 8:25 pm

Thank you for your kind comments JC. :woops:

I only have a small model engineer’s workshop with no modern electronic gadgets.
The panel was rough cut from 3mm thick stainless steel plate using a bandsaw; then the finishing cuts and the recesses were machined out using endmills in a 60 year old manually operated vertical milling machine. The plate was then polished using progressively finer grades of wet & dry paper and finally buffing it on a polishing mop; the same process as the strips used on the playing surface. I had to cheat with the lettering though; the letters are stainless steel earrings, with the studs clipped off, stuck in the recesses with structural adhesive; a coat of enamel paint finished it off.

John

slotsoffun
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Re: Bryans Worlborl

Postby slotsoffun » Wed Jan 15, 2014 9:00 pm

What a fantastic and I bet, rewarding project. Love following this post and can't wait for the finished item. Thanks too for the detailed explanations of how you are making the thing, as for using the ear rings for letters.. genius!!!

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wembleylion
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Re: Bryans Worlborl

Postby wembleylion » Wed Jan 15, 2014 9:19 pm

Polishing the Stainless Steel strips; Out-take.
Linisher-vs-Garage-Door-1.jpg
Or perhaps this photo should be ‘Spot the Deliberate Mistake’
Linisher-vs-Garage-Door-2.jpg
Linisher-vs-Garage-Door-3.jpg
Answer: Don’t put the linisher in front of a window.

The surface of most metals as they come from the rolling mills have a myriad of tiny pits and troughs which need to be removed before the metal is buffed on the polishing mop. Normally this is done using progressively finer grades of abrasive belts on a belt sander (linisher in engineering speak).
I couldn’t get any ready polished stainless steel so had to do this job myself. The strips for the playing surface were 12mm wide by 3mm thick by 1 metre long and the surface was quite badly marked so I decided to start off with a run on the linisher. Unfortunately, I allowed the strip to run under the stop at the end of the belt and the stop gave sufficient down pressure on the strip for the belt to drive it through the Georgian wired glass panel at about 20mph and propel it nearly 10 meters across the garden. The resulting rectangular hole in the glass is only 2mm larger than the strip.

I suppose I should now say ‘Don’t try this at home’

John

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badpenny
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Re: Bryans Worlborl

Postby badpenny » Wed Jan 15, 2014 9:25 pm

Fantastic John, that's my kind of engineering.
Good job your garden is long enough for us not to be reading about you in the papers.

BP

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slotalot
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Re: Bryans Worlborl

Postby slotalot » Wed Jan 15, 2014 9:31 pm

wembleylion wrote: the letters are stainless steel earrings, with the studs clipped off, stuck in the recesses with structural adhesive;
John
BRILLIANT!!! I like your thinking !!THUMBSX2!!

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jimmy55
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Re: Bryans Worlborl

Postby jimmy55 » Wed Jan 15, 2014 10:09 pm

I think Chris Houghton was caught wearing a pair of those 'GOAL' earrings last weekend John. Good to see you sticking to Canary colours too!

13rebel
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Re: Bryans Worlborl

Postby 13rebel » Wed Jan 15, 2014 10:40 pm

On the ball city! Fantastic job,John.


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