Having some issue with the mini-stepper unit for match in Gottlieb Sure Shot, I’ve cleaned it up and now all electrical connections are good, match will “match” as appropriate and so forth, but often does not advance, the plate that is activated by the relay, which has the small plastic teeth comes off center, misaligns, and no longer advances the stepper, if I put pressure on the front of this plate and manually activate from the rear, by pushing down near the spring all works fine, without the pressure on the front of the plate, when activated the plate does not settle back correctly on the gear axil and fails to drive forward the stepper, wondering if I’m missing something, like another spring, or something that helps keep these little plastic components aligned correctly. Pictures below of unit.

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I’ll look at the links sent from Howard, but to answer the other two questions, I have only one spring, so if two are needed, I can’t see where the 2nd would go, and in regards to the spring being original, I have no idea but looks like the others on the other relays hanging next to it.

Upon closer look, you are correct, it is a different spring, so would seem that’s correct. Regardless using either spring it does not work, the pallet moves forward off the gear, away from the spring and won’t re-sit properly, I just can’t seem to understand what keeps this from happening, if the spring is removed by example the whole pallet just falls out, would seem some sort of pressure from above or the front would be required to keep it in position.

Assembled now and working again, but I think this is short lived, I believe the tab end of the armature has worn, such that when the spring lifts the tab end up and into position, as shown in the first picture below, within the housing it does not lock-in, and has the ability to slide forward, thus disengaging from the gear drive, seems PBR no longer sells this armature, either raw or assembled, I’ll post a pic of the drawing for reference should anyone else have a similar issue. You can see in the drawing the tan end is slotted, I assume this allows the armature to stay in position when activated.

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Thanks for all of the suggestions.

Matt

You are correct, the “red” in your drawing is the area that’s worn, and I believe the root cause of the slippage, I’ll take a look and see if I can peen these areas as you suggest. Thanks again.