General vintage slot machine related topics.
garythegolfer
Posts: 12
Joined: Mon Nov 20, 2006 8:54 pm
Location: Essex

Re: Uniselector wanted

Postby garythegolfer » Mon Dec 28, 2015 2:30 pm

Hi,
Did you have any luck getting hold of a Siemens uniselector? It turns out that I could really do with one of these as well.....for the same reason! I have finally found the real reason that my Electrodart was scrapped.

Yours hopefully,
G :(

User avatar
slotalot
Posts: 1816
Joined: Mon Apr 21, 2008 1:53 pm
Location: Halifax West Yorkshire
Contact:

Re: Uniselector wanted

Postby slotalot » Mon Dec 28, 2015 5:08 pm

Hi Gary, not got the right one yet :cry:
surprised to hear of Siemens uniselectors being used in an Electrodart !PUZZLED! have you got a photo of your machine? what problems do you have with it??
Regards Stuart.

garythegolfer
Posts: 12
Joined: Mon Nov 20, 2006 8:54 pm
Location: Essex

Re: Uniselector wanted

Postby garythegolfer » Mon Dec 28, 2015 11:08 pm

Stuart,

Earlier photo attached showing the 2 (black-faced) Siemens uniselectors. This was part-way through the rewiring. The machine had been cannibalised and had much of the wiring missing/damaged. I used your wiring diagram to try to work out how it should have been wired (Thank you!). I have uploaded my revised diagrams (based on your work) to the resources section. There are some minor revisions still to come. The rewiring is just about complete now and the machine does sort of work. The biggest problem now turns out to be the Left hand uniselector......the machine runs and pays out sometimes. Mostly it pays out double or doesn't payout or pays out continuously. All the faults are a function of the faulty left hand uniselector.

The left hand uniselector has damaged wipers tips. They had been butchered and are of uneven lengths so that is currently impossible to get all the wipers to simultaneously sit somewhere near the middle of the bank contacts.

I do have a very nice 6-way (GEC?) uniselector but that needs about 50 volts and the Siemens variety (and my whole electrodart) function on 24 volts. Making the LH uniselector (alone) work from 50 volts turns out to be a real pain.

The easiest solution for me would be to replace the LH Siemens.....preferably whilst retaining the existing uniselector bank and wiring.

Gary
Electrodart 4.JPG

User avatar
slotalot
Posts: 1816
Joined: Mon Apr 21, 2008 1:53 pm
Location: Halifax West Yorkshire
Contact:

Re: Uniselector wanted

Postby slotalot » Tue Dec 29, 2015 12:21 am

Hi Gary, that range of jamieson machines can be tricky buggers to set up at the best of times, I wish you luck, I am sure you will get it sorted given time, if I do manage to find any siemens uniselectors I will let you know, it is only the lower half / rotor of the selector that I need, looks like someone has had this apart and lost the lower section :dammit:
I am sure one will turn up :cool:

garythegolfer
Posts: 12
Joined: Mon Nov 20, 2006 8:54 pm
Location: Essex

Re: Uniselector wanted

Postby garythegolfer » Mon Feb 15, 2016 11:52 pm

OK. There's good news and bad news. I finally bit the bullet and rewound the 50v GEC 8 way uniselector to work from my Electrodart 24 volt system. It turns out that (for me at least) 2070 turns of 0.22mm wire can be replaced with 1040 turns of 0.31mm wire. This steps 50v down to 24v whilst keeping the power about the same (~30 watts). ie the same magnetic pulling power :D This was all the 0.31mm wire that would fit on the bobbin.
[Incidently an excellent primer on rewinding can be found here: http://www.qsl.net/ki7cx/Coilrewind.htm and an excellent calculator, if you want to be more technical, can be found here: http://www.daycounter.com/Calculators/C ... ator.phtml ]

That was the good news. The bad news is that I now have to unsolder all the left hand (Siemens) uniselector connections and reconnect them all to the replacement GEC uniselector...... !!GRUMP!!

User avatar
badpenny
Forum Moderator
Posts: 6011
Joined: Thu May 05, 2005 12:41 pm
Location: East Midlands
Contact:

Re: Uniselector wanted

Postby badpenny » Tue Feb 16, 2016 10:23 am

Here's to you Gary !THUMBS!
Woo Hoo for the good news.

Good luck regarding the bad news. !!UHOH!!

User avatar
pennymachines
Site Admin
Posts: 4750
Joined: Wed Nov 06, 2002 12:12 am
Location: The Black Country
Contact:

Re: Uniselector wanted

Postby pennymachines » Tue Feb 16, 2016 1:46 pm

I'm still trying to track down a SIEMENS 25 x 4 UNISELECTOR No 15A, 1950s Yes, Slotalot was trying to source one for my Dial For Money. Unfortunately, he's otherwise engaged of late and no longer has time to fix machines. :cry: so I'm going to have to get my fingers dirty (or more likely burned :zapa: ) on this one. But first I have to find that uniselector... !SEARCH!
siemens-uniselector.jpg

User avatar
badpenny
Forum Moderator
Posts: 6011
Joined: Thu May 05, 2005 12:41 pm
Location: East Midlands
Contact:

Re: Uniselector wanted

Postby badpenny » Tue Feb 16, 2016 2:05 pm

Image

This is currently on ebay at the moment eBay Click
GEC and Siemens are related, I can't comment on suitability especially regarding model numbers. The vendor appears to be savvy about electronicalness so maybe could advise you.

BP :didact:

garythegolfer
Posts: 12
Joined: Mon Nov 20, 2006 8:54 pm
Location: Essex

Re: Uniselector wanted

Postby garythegolfer » Tue Feb 16, 2016 4:05 pm

I believe the Siemens uniselectors were nominally about 24 volt whilst the GEC uniselectors were nominally about 50 volt. So they are not really interchangeable except if you take the original coil windings off and replace them with the right number of turns of the correct and different diameter coil wire. This is what I have done in desperation a couple of posts above.

Regards
G

User avatar
badpenny
Forum Moderator
Posts: 6011
Joined: Thu May 05, 2005 12:41 pm
Location: East Midlands
Contact:

Re: Uniselector wanted

Postby badpenny » Tue Feb 16, 2016 6:33 pm

Good point, of course we don't know the voltage Mr P's machine is feeding on nor if there is a resistor in line.

Edited to point out to myself that even if there were one it wouldn't control voltage - fool. !PUZZLED!


Who is online

Users browsing this forum: No registered users and 3 guests