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I have a 42 code on a RW&B S+ machine.  I have changed the reel and I have also switched reel 1 and reel 2 wires and still have 42.  Anyone know a fix for this problem?

The [42] error should have been a [41] error code - if you switched reel#1 with reel#2.
Because the code didn't change when you switched reels -
the problem either with one of the harness connector pins or the MPU.

Try switching the reel#1 Molex connector to the 2nd reel and the #2 reel connector to the #1 reel
and see if the you get a code [41]

If not, then check the pins inside the Molex reel connectors
to see if any pins got pushed back into the housing.
I'd highly suspect the #2 reel Molex pins.

Do you have a spare MPU?

If you have switched reel 1 for reel 2 and persist erros 42 then your problem is posible wire or MPU but if erros changed erros 41 or 43 then your problem is reel sense optic or motor step step.

I switched out the MPU and that fixed the problem.  Thanks

You solved one problem but you still have a bad MPU....  :5-

I have 8 extras so no problem!

Does anyone know how to repair the mpu in the case of continuous 41, 42, 43 Tilts? I hate just replacing hardware and not repairing it!

Check out the "S+ CPU 2" .pdf file attached to this post (http://newlifegames.net/nlg/index.php?topic=389.msg2355#msg2355).  There's a good "1" and "3" .pdf file in that thread, too, but "2" addresses reel tilt issues.

Most often its the stepper motor IC's as per Ozzys post - But before you replace these just confirm its not the optic side by doing a input test and moving the reel manually.
If it is the stepper IC you can steal one from the reel 4 and 5 position if you dont have any replacements - as long as You have a 3 reel chip machine wont mind.

I have an S2000 that had a Reel 1 Tilt error. I believe the SB chip failed the same way. So it's not just on the S+ platform. One hint: Don't turn the reels manually by hand when the machine is on! It might just error but in my friend's case, it fried the Stepper Base chip. His kid tried to line up the 3 Jackpot symbols and that's what happened.

Stepper motors just like regular motors can also act like a generator. If turned slowly and just a bit, would probably not cause a problem. But if someone gives it a good spin, it can generate enough juice to fry the controller.

 Wait a minute, if you have the power on, how are you going to give the reel a GOOD spin ??    :103- :103- 

Some stepper motors (like those used in slots) are not that strong. I've accidentally rubbed my arm against a reel and had it move fairly easily (and tilt of course). Now, I've built CNC machines with high torque steppers that are not going to budge under power. Point being is you can grab the reel and turn it fast enough for it to possibly do bad things.

Well the SB chip is kaput...........because of what is described above. I truly believe that. On the S+ the reels "stiffen" up when the power is applied whereas on the S2000, they don't. (I Think).

I doubt that spinning the reels on a S2000 can damage the Base chip normally.
I wont say it cant happen but I find it highly unlikely.
Spinning the reels would more likely damage logic that is connected to the stepper controllers, or reel optics.
IGT likes to use Opto Isolators when ever possible or feels the need to do so.

More likely that something was removed with the power on that caused the base chip to fail.

Mark  only two words need to be said " B S. " I'm not just going to believe something just because you say it so.  Try this, with the power off to one of your machines spin one of your reels as hard as you can. How many revolutions did it make ??  Bet you it didn't make one complete rev. more likely less than a half. Produce enough electricity to harm a base chip sure I'm really believing that one !! right

I'm not 100% sure on this statement, but I never heard of a electrical motor that will produce electricity, if it did it wouldn't be a motor it would be a generator. Now you can hook electricity to a generator and it will spin like  a motor ( that's how we use to test generators to see if they were good or bad)


Reed Yes S 2000 reels get stiff just like a S+

Hey, Buzz, Mark is correct. :89-

An electric motor can function as a generator, that's exactly the principal behind hybrid cars: The power unit functions as a motor running off the batteries to drive the car on acceleration, and functions as a generator to charge the batteries on deceleration. :186-

You also proved this with your generator test above, you were applying power to the generator and it functioned as a motor.  :3-

DC motors with brushes can generate electricity but probably not as efficiently as a generator.
Due to how they are designed and made.

Stepper motors are AC devices, I doubt they can produce any electricity if they can it would be on the order of mV to maybe 1V.
They do not spin very much by hand with power applied. now with power off they will spin more freely.
 

This is incorrect.

Stepper motors are DC devices which function by using a ferrous core in the rotor ( this can be a permanent magnet in the case of a PM stepper motor or a non-magnetic design in the case of a variable reluctance motor, or both can be used in the case of a hybrid stepper motor), and the rotor is moved by energizing stator windings in sequence. In the case of a variable reluctance motor, there will be no electricity produced if you spin the rotor, since there is no magnetic field present. Note that both the PM and hybrid steppers will generate electricity if you spin them, since you're rotating a magnet past electrical coils and we all know what happens when magnetic flux fields move past electrical conductors.

Here's a pretty good technical description of stepper motors and their functions:
http://www.engineersgarage.com/articles/stepper-motors (http://www.engineersgarage.com/articles/stepper-motors)

Actually I have read they are AC or DC (pulsing DC which is is really a form of AC)

http://en.wikipedia.org/wiki/Stepper_motor (http://en.wikipedia.org/wiki/Stepper_motor)

According to the S+ MPU schematic they feed 24VAC to the TY40477 Stepper controllers.
Why would IGT do that if they are not AC

I agree that the only thing likely to be damaged is the stepper driver chip and to a lesser degree the optics circuit or drivers for back lit reels if equipped if the reel is unplugged/plugged in under power

AC is defined as current flow that periodically reverses. DC NEVER reverses, pulsed or not. When DC is pulsed, it will go from 0 to some value either negative or positive, and back to 0.

I looked up a data sheet for the TY404 series stepper controller you mention above (http://pdf1.alldatasheet.com/datasheet-pdf/view/156973/RALTRON/TY4045AD3.html (http://pdf1.alldatasheet.com/datasheet-pdf/view/156973/RALTRON/TY4045AD3.html)), the supply voltage is listed as 3.3 or 5v. You may want to revisit the schematic.

Well, if one really wants to get technical, AC is alternating current. Pulsed DC without a common ground reference would indeed be considered a form of AC. Many modified sine wave inverters work on this exact principal.

I have spun the reels on both the S Plus and S2000 machines on many occassions and never have i blown any components. This was with the power on. I do this when i clean reels optics and place a small piece of Cotton dabbed in non alcoholic cleanser on the inside of the reel to run through the optic.

Show your waveform.

Pretty basic stuff. I built an inverter out of spare parts 20 years ago. DC in - AC out. No common ground so the amplified output is AC. The originating sqare wave would go from 0V to 12V (or whatever your input voltage is). Even if it did not go through a step up transformer for isolation, the sqare wave would still be 12V AC across the output (i.e. measured with a non grounded meter).

I'm disappointed you fell for that. :208- :208- :208- :208-


That's a voltage waveform. Before you can have a technical discussion about electricity, you need to understand the difference between voltage and current.

OK, but we have not pinned down the answer: Does spinning the reels when the machine is on ruin anything or not?

If I hook it up to the engine in my motorcycle and spin it at 13000 rpm, I can guarantee it will ruin something... :71- :89- :79-

Is it normal for a reel being spun by hand with power applied to cause a Base Chip, Game Chip, Version Chip, SP or SS chip to fail no way.
Can it happen yeah but not very likely.

I think the Base chip just happened to fail either at the time the reels where moved by hand or afterwords.
Anything man made will fail or breakdown eventually.

I'm not going to get into an argument about this, but I was an electronics instructor in the military for many years. Voltage and current have a direct relationship. Simply put, if you put a load on the output you will be drawing current I=E/R. The amount of current of course will depend on the design. This is basic electronics.

Here is a very simple inverter design. The source is 12V DC. The Q1 & Q2 oscillate at a frequency depending upon the RC network used. The resulting waveform (more of a sine wave in this case) will vary between 0V and 12V. This gives you an AC voltage across the primary of T1. So even if you did not use the secondary winding, there is still an AC current flow through the primary. The transformer steps up the voltage (and reduces the current) and you now have 120V AC on the secondary. The same can be done using a square wave but depending on the frequency, the primary winding may overheat. Hence the use of modified sine waves in most common inverter designs.

And to simplify it even further, here is a simple square wave (pulsed DC) at 60Hz. Assuming a 12 ohm load is connected to this, during the rise time from 0v to 12V you will draw increasing current across the resistor until it peaks at 1 amp (I=E/R). During the fall time back to 0V that current will decrease to 0 amps. Hence you have alternating current (AC). The only difference between a square wave and a sine wave is the square wave has a faster rize time and will stay at it's peak current and zero current levels longer. Increase the square wave (pulse) frequency enough, and the difference becomes negligable (which is the basic concept used in a switcher power supply). 

http://encyclopedia2.thefreedictionary.com/Alternating+Current (http://encyclopedia2.thefreedictionary.com/Alternating+Current)
 
Can't make it any simpler than that.   :88-

Mark, you're right. You can't make it any simpler than that, and I see where you're making your error.   :96-

The current flow must REVERSE, not simply drop to 0, in order to be alternating current. You state in your example that since current flow drops to 0 that the criteria for AC has been met, but it has not according to the definition you reference.

<edit>

Don't get caught up in thinking the waveform shape itself has anything to do with whether it is AC or not. Sine, square, modified sine, sawtooth, etc., matters not one bit, it is simply the direction of current flow that is the determining factor.

Are audio signals considered AC, yes

Then Ponder this: In the simplest AM radio they use a diode to detect the Audio portion.

I can guarantee that that audio is not crossing 0 but is still considered AC.

 :182-

It does reverse. If one were to take a 12V battery and generate a square wave (or sine wave), then you would indeed have AC measured across the output. This is the fundamental reason inverters work. All of the criteria has been met.

But here is proof. I set up my signal gen to produce a square wave with a zero volt reference. Put it on my scope and then measured the AC voltage across it with my Fluke (which has no common zero reference). Factoring RMS, it's right on the money. And even if it did have a common ground, it would still be AC. AC does not have to go below ground (zero) to be defined as alternating current. As long as the current rises and falls - by definition it is AC. If I would have put a resistor or inductor or whatever across those leads the current would indeed be reversing as far as the component is concerned. The 'zero' point would be 1/2 of whatever the peak to peak of the signal is.  

But this is getting way off topic and I'm not going to keep trying to explain basic electronics. I've been doing this for too long. :96-

edit - Foster makes a good point. If I were to connect this signal to a speaker (which is current driven) it would hum along just fine as the coil would need AC to work.

Your mistake lies in the fact that you state audio waveforms are AC (which is correct), but it is not correct to state that ALL audio waveforms are AC.

Just so we're clear on this, take a look at
http://www.ece.cmu.edu/~ee321/spring00/lab3.pdf (http://www.ece.cmu.edu/~ee321/spring00/lab3.pdf)

Look at the waveform after the diode in Fig. 3.4, you'll plainly see that it is a DC waveform that is input to the earphone, and even though it is DC, it is perfectly capable of driving the earphone.

They have to be AC or the speaker coil would not work. You keep confusing ground reference for some reason as part of the criteria when it's not.  :7- I could take that signal I showed above, stick two 100K ohm resistors in series across it and use the tie point as 'zero'. I would then have a signal going positive and negative in relationship to that point. That didn't make it any more or less AC then it started.

Except Twinkies.

(http://i52.tinypic.com/5n3hit.jpg)

You are  :79-  :208-