Hi MarkG
good topic, good post-1. I fully agree. Think of "Humpty Dumpty ... Space Walk" - evolution, advancement. It is hard to make a machine foolproof - it is impossible to make a pin to run under any condition. Over the years the engineers did a lot of work to handle the silly / strange things "players did at the arcade times" - like pressing the Start-Button when the pin in play is busy giving 500 points (and so the motor is running to help making the 500 points - at that time the motor cannot do a complete startup). My Ice Revue (1965) is wired the same as Your Sweet Sioux.

To stick to the problem --- Coin-Reflectors were invented - and the Coin-Lockout-Coil (should be called STOP-Coinlockout-Coil (thats its functionality)) --- I have seen it in late Bally pins - whenever the motor runs: This Coil moves its armature (back) so temporarily Coins are reflected. JUST BECAUSE some people at the arcade times were so stupid to throw-in some coins at times they should not.
(((When I study an schematics and I do not understand "what is this switch for" - it usually is for to handle "extraordinary situations caused by weird behaviour of players". Greetings Rolf

So how is the motor reset to home position?

Coin-lockout has always interested me. I have it on my Bally Solid State machines and often wondered why people would coin an obviously powered off machine (as kids we certainly wouldn't try in the arcade). Now I have a Bally EM (no power toggle switch) if it is powered I can turn the lights on and start a game with a coin, so the first player illuminates the machine for the operator so perhaps people still had this idea with later games.

Hi astyy
do You know the lovely feature on Bally and Williams pins "pressing the left flipperbutton turns on the Playfield- and the Backbox-Lights" ? These pins may look toggled-off / unplugged --- but they have current to the transformer - they come alive when pressing the left flipperbutton / throwing-in a coin - they may need an operater-note on the pin "Out of order" (so people do not throw-in a coin). So some people "had this idea with later games". (((In the arcade times walking up to an unlighted Bally / Williams pin: I always tried the "left flipperbutton feature" - if it did light-up I then threw-in a coin. I only did throw-in a coin on an Gottlieb pin when it was lit - at least the Tilt-Light in the Backbox.)))
What model is Your Bally EM-Pin ?
In the arcade times all Servicemen knew "motor must be in Home-Position for to minimize problems" --- they turned the motor manually or they did the "throwing-in a coin" trick. Greetings Rolf

IIRC, on my Gottlieb EM games that have a coin slot for multiple games per coin, I can insert a coin and this will cause the motor to return to its normal position. It may or may not add the correct number of credits on the replay wheel, depending on how far the motor had to turn to get to normal.

Rolf, it is Rocket III. It does light on left flipper button, coins (I bought old ones especially) or replay button will light and start game. Since I converted it to DIY AAB (you remember the thread!) if credits are on the Replay unit it is in free play and Replays never decrement in AAB.

MarkG apologies for derailing your thread and talking about Bally's.

The 1953 Gottlieb Flying High, that I have been working on. Would not start unless the motor was at a Home Position. Found a contact on the E Relay which was out of adjustment. After the adjustment, the motor would stop in the right place every time.

Your on to something. If the power supply is cut, during the motor spinning. Then turned back on, the replay button will not reset the game. Had to on a few occasions, reach in and rotated the motor to start up the game.

The 2 motor 1c switches need to be clean and adjusted properly for the machine to work properly. The n.o. 1c switch is the motor runout and keeps the motor running until it finds a home position.