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A guide into the 70s electro machine


BF74
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Apart from cleaning there are some maintenance points to check on the electro main panel.

 

Most covered relays will not need stripping to clean as they are sealed.These relays have already run for many years and no reason for them not to continue giving good service.A relay in good condition should look like this. post-480-0-87219700-1359216900_thumb.jpg

 

However because BF electros use 240vac payslides, there are a couple of relays that do need to be checked regulary depending how often payout operations are made by your machine.

These are any of the machines payout relays.

Most machines like SNG have two,One for cash and one for tokens.post-480-0-12326800-1359218380_thumb.jpg

 

 

Even If you have a machine that is set to all cash payout, you will still need to check both the cash and token payout relays. As the jumper wire is fitted at the cash payslide end of the circuit, Any of the origional token wins are still pulsed by the token payout relay. ;)

The same procedure is required for club machines too only it will be 10p payout and 50p payout relays.

If these contacts are left without maintenance then the sparking eventually either burns off the contacts completely or welds the contacts together which results in the payside being permanently energised.As this is mains voltage the payslide will heat up and melt before the fuse blows.

 

Here are examples of 2 relays removed from payout positions(left), compared with 2 relays(right) used and removed from any other operating position on the same main panel.post-480-0-22362600-1359218002_thumb.jpg

Although they are still operating,Normally in workshops all those years ago these relays would simply be scrapped and replaced with new.

Today we don't have the same luxury so they need to be stripped and cleaned.

 

Because of age there are many cam switch spade connectors breaking and falling apart resulting in a loose connection.post-480-0-08189000-1359219351_thumb.jpgpost-480-0-55189100-1359219387_thumb.jpg

Without a secure,tight connection of these connectors to the cam switches,the machine can easily develop intermittent faults.

Any faulty connectors I will automatically replace with these.post-480-0-49502500-1359219607_thumb.jpg

 

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  • 4 months later...

Massive thank you Ron for putting this guide together.  I have only just found it and not had chance to read it all tonight but what I have seen is invaluable information for the novice like myself with their first elctro imminent.  Will bookmark this and have a good read through with fresh eyes in the morning.

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  • 8 months later...

The Variator cam and (Jackpot control cam.fitted only to club electro's)

 

The Variator is a timer controlled cam which basically stops the reels from running in a sequence.

 

Variator or scrambler described on some schematics cam is made in raised steps of unequal size,  post-480-0-93206200-1395155406_thumb.jpg   It these steps that the cam switch rolls over and in turn causes the switch to make and break a circuit.

This circuit is connected to the main game control timer.

The main game control timer has a 3 second revolution so without the variator it would normally take it 3 seconds to complete it's 360 degree in every game cycle.

 

Once the start button is pressed and the main control timer sets off on it's cycle and the game begins,Just before the reel solenoids lift to let the reels spin the switch running on the variator cam takes control of the circuit to the main control tmer motor.

 

Because of the make and break action or the variator cam switch, the circuit to the control timer motor is now switched with an on/off action as the variator cam turns.

It's during the reel spin and while the variator has control of the circuit that the control timer motor cycle is increased anywhere between 3&5 seconds.

It is this difference in the rotation time of the main control timer that in turn makes the difference in the release point of the reel solenoids.This is measured in m/sec but enough to stop the reels running in sequence.

 

The variator returns control of the main control timer to finish it's cycle once all three reels have stopped.........

 

 

 

 

The Jackpot control cam is designed to reduce the chances of gaining any of the higher jackpot wins.At best it could be called a % control.I always thought it was an illegal device.

Having said that,It was a known feature the Gaming Board were aware of at the time.

 

Again much like the variator cam,It has a similar stepped cam.The difference was that the jackpot control cam was wired to a set of studs on reel board 2.

The reel drum wipers on reel 2 passing over the wired studs would complete a circuit actually wired to the number 2 reel solenoid.

 

The jackpot control circuit wired to the studs would correspond exactly in the same position as the highest jackpot symbols position on the reel drum.

The switch on the jackpot control timer would operate with the similar make or break circuit to the wired studs.

 

If the circuit from the jackpot control switch is active when the jackpot symbol drops onto the win line,The active circuit prevents the reel 2 solenoid from dropping until the symbol has gone past the win line,The wipers have now passed by the wired studs breaking the circuit and allowing the solenoid to drop.

Players can notice this action when the second reel appears to skip.

 

Because the electro club was normally a four reel machine,the control circuit on reel two would prevent wins from left to right,right to left and all four reels where the top jackpot symbols were concerned.

To assist this action you would always find only one jackpot symbol on reel two.

 

 

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Thanks Ron, this explains alot. When I had my JPM Step up the guy I bought it off said there were two toggle switches on the main board, one was for gamble and the other was to vary the reel slip. At the time I didn't realise why you would deliberately slip the reels. I seem to remember the two way switches being labelled "Conservative" & "Liberal".

 

Like Stef says I might bypass the JP control cam and see if we can up the percent a bit.

 

 

On another note, I remember from years ago people always said they new when the clubber was going to pay the JP as the JP symbols were coming into the viewing windows a lot and was only a matter of time before they lined up, most times the JP symbols are never to be seen only lower win symbols, never new if there was any truth in this, it's just something I remember in the late 70's.

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My Ace "Casino Royale" has three switches. One for slipping a different symbol on each reel. There are three main jackpots with three symbols. Put all three switches on and odds are reduced for each jackpot. Oddly enough the slip is not done by a timer. Can't remember the exact reel or symbols but it works something like this. Say an orange coming in on the third reel will latch a relay for the slip to take place. The three contacts on the relay go through the three option switches to the index solenoid when a jackpot symbol drops on the pay line. The relay the stays on until say a lemon drops on the third reel. The relay then drops out until an other orange appears and so on. Clever Eh!

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On Bell Fruit electro clubbers it affected mainly the one jackpot symbol on reel two.

But If you own a later machine such as Pussycat or Hot dog it affects ALL the cat&dog symbols on reel two.

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My Ace "Casino Royale" has three switches. One for slipping a different symbol on each reel. There are three main jackpots with three symbols. Put all three switches on and odds are reduced for each jackpot. Oddly enough the slip is not done by a timer. Can't remember the exact reel or symbols but it works something like this. Say an orange coming in on the third reel will latch a relay for the slip to take place. The three contacts on the relay go through the three option switches to the index solenoid when a jackpot symbol drops on the pay line. The relay the stays on until say a lemon drops on the third reel. The relay then drops out until an other orange appears and so on. Clever Eh!

 

 

So it's different fruit symbols that will activate or de-activate the slip circuit? Once activated by one fruit symbol the slip circuit won't de-activate until a particular fruit symbol lands on the pay line? Have I got that right?

So I'm guessing more of a random slip than one controlled by set time ranges on a timer.

 

Interesting stuff.

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nice write up ron . I must get myself an electro clubber one of these days as it would be interesting to see the difference it make s taking this device off . A hotdog or pussy cat would be nice !

 

 

Might try removing it on my Speculator Nick, will let you know what it does to game play.

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There are 4 steps I believe, what are the on/off timings of these please Ron?

 

Is there a cam timing table available like on the schematics for the main control unit and payout timer etc?

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I have never actually timed those steps Dan only that the four steps on the red cam will operate during the 1revolution of the variator.

 

Yes the cam timer tables are shown on all BF schematics,including the settings in degrees of each cam.

They are shown on other manufactures schematics but many do not go into detail.

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  • 4 years later...

Just found this very important item last week.

For some time I could not remember for the life of me what the oil type was we used in BF workshops to soak the clutch washer in.I have always thought that something used in the 70s would be long gone.

 

Then there it was on ebay, Neatsfoot oil.

 

This is designed to soften leather and protect it from damp and turning rock hard which is the problem with all the leather reel clutch washers and the cause of reel slip.

 

I ordered this 500ml can for just over 4 pounds and arrived today so all reel clutch washers in future will get the treatment and recommend for any electro reels.

 

 

F.A.O Nick (Sulzerned)

 

Nick everything you need to know for reel strip and servicing is here from post #74

 

Let me know how it goes.

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  • 1 year later...
On 7/23/2012 at 2:42 PM, BF74 said:

Just found this very important item last week.

For some time I could not remember for the life of me what the oil type was we used in BF workshops to soak the clutch washer in.I have always thought that something used in the 70s would be long gone.

 

Then there it was on ebay, Neatsfoot oil.

 

This is designed to soften leather and protect it from damp and turning rock hard which is the problem with all the leather reel clutch washers and the cause of reel slip.

 

I ordered this 500ml can for just over 4 pounds and arrived today so all reel clutch washers in future will get the treatment and recommend for any electro reels.

post-480-0-59240400-1343050789_thumb.jpg

In JPM production Assembly we always soaked reel unit, leather clutch washers in neatsfoot overnight.

Regards, Frank Bird.

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  • 2 years later...

At JPM we once had a lorry turn up from Ireland that had delivered frozen goods to a local establishment and had been paid to pick up machines for the return journey.

The lorries compressor unit was stuck on, so the the thing was like a huge fridge and the guys loading the lorry with sack trucks soon had coats on, although as the machine were in those huge plastic bags no one was unduly worried.

Unfortunately the contraction coefficient of solder is much different to the relay base metal tags so the vast majority of them fell off and even those that didn't were suspect.

The relay base has 11 soldered connections as I remember and the club machine had 20+ relays and there were 40 machines delivered. 

That's somewhere near 9,000 questionable connections!

It took us days to solder the bloody things back on, but at least the Guinness and craic were good.          

Ha just remembered another funny incident. Martin Stork and I were in Ireland and we were working on a couple of machines, don't forget this is in the 80's.

We were modifying product and terminating cables using 'bomb ends'.

https://www.rivval.com/Product.aspx?p=RP00454/1

The look on peoples faces when I shouted to Martin to chuck me a couple of bombs!

    

Edited by Frank Bird
another funny tale!
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Frank, Can you remember what were the last JPM electro machines manufactured.

I think the last AWP was One And ALL as Each Way Nudger was advertised just a month or so later in 79.

It's the club machine I can't track down, the nearest I can guess is Jackpot Gambler.?

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Honestly can't remember, sorry!

I know this is going to sound strange but I was never interested in the games themselves, just the figures they produced, the mechanisms within them and the design process.

 

 

 

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