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<blockquote data-quote="Zaphod77" data-source="post: 127985" data-attributes="member: 2101"><p>99% likely the issue is the trough entry switch and solenoid are not implemented properly. here's the proper way to handle a williams multiball trough.</p><p></p><p>Have two stacks. one of balls waiting on the entry solenoid, and one of the balls in the trough.</p><p></p><p>When a ball drains, add the ball to the entry solenoid stack, and depress the entry switch</p><p></p><p>when the game fires the entry solenoid, release the entry solenoid switch momentarily, remove the ball from the entry stack and add it to the main trough. Then redepress it if there's still a ball. </p><p></p><p>To avoid confusing the software, travel time of the balls must be simulated. balls shouldn't jump to the first open switch, but should roll across the other ones in the way as well. That said, some games are more tolerant than others.</p><p></p><p>The 6 ball troughs i believe are different, and have no entry solenoid. drained balls simply roll to their proper position by gravity.</p><p></p><p>Single ball troughs are usually different. sometimes there is just one switch, one ball feed solenoid, and no entry switch or solenoid. Bad Cats ins an example. the ball is slung directly form outhole to plunger. check the manual when in doubt.</p><p></p><p>Gottlieb (premiere) games handle things differently. they DO have an entry solenoid and switch by it, but only one switch in the actual trough, which closes when the trough is FULL in most cases. If, after locking a ball and plunging, the game serves another ball, and ends your ball when one drains, it is because you mistakenly assumed the trough switch only opens when the trough is empty, and need to do things the way I just said. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p>Stargate is a special exception. it uses a three ball trough and an entry solenoid, but has four balls! it leaves the fourth ball on the entry switch. It's trough also seems to behave differently. i haven't figured it all out.</p></blockquote><p></p>
[QUOTE="Zaphod77, post: 127985, member: 2101"] 99% likely the issue is the trough entry switch and solenoid are not implemented properly. here's the proper way to handle a williams multiball trough. Have two stacks. one of balls waiting on the entry solenoid, and one of the balls in the trough. When a ball drains, add the ball to the entry solenoid stack, and depress the entry switch when the game fires the entry solenoid, release the entry solenoid switch momentarily, remove the ball from the entry stack and add it to the main trough. Then redepress it if there's still a ball. To avoid confusing the software, travel time of the balls must be simulated. balls shouldn't jump to the first open switch, but should roll across the other ones in the way as well. That said, some games are more tolerant than others. The 6 ball troughs i believe are different, and have no entry solenoid. drained balls simply roll to their proper position by gravity. Single ball troughs are usually different. sometimes there is just one switch, one ball feed solenoid, and no entry switch or solenoid. Bad Cats ins an example. the ball is slung directly form outhole to plunger. check the manual when in doubt. Gottlieb (premiere) games handle things differently. they DO have an entry solenoid and switch by it, but only one switch in the actual trough, which closes when the trough is FULL in most cases. If, after locking a ball and plunging, the game serves another ball, and ends your ball when one drains, it is because you mistakenly assumed the trough switch only opens when the trough is empty, and need to do things the way I just said. :) Stargate is a special exception. it uses a three ball trough and an entry solenoid, but has four balls! it leaves the fourth ball on the entry switch. It's trough also seems to behave differently. i haven't figured it all out. [/QUOTE]
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