This is giving me flashbacks (from 4 years ago)... Figured I'd share my saga (short novel incoming... ). Back then I posted a lot about it, troubleshooting steps, what helped, what didn't etc. in this other forum topic if you want to look them up.
Quoted from Rensh:Thanks. This in combo with reducing the power appears to have fixed it. At least 25 tries in a row now 100% OK
Thanks again.
Yup that's a great way to fix the issue and those changes alone seems to work best for most. I was very skeptical about this change back when I was having so many rejects but in the end that, in tandem with some other adjustments worked out.
In regards to adjusting the #256 AUTO-PLUNGER POWER setting. For me the magic number ended up being 182 (190 is the default), here's my post where I was testing multiple power levels.
Quoted from Wildbill327:When your ball is in the shooter lane how is it resting against the auto launch forks. They may need to be opened or closed a bit to make sure both sides of the forks contact the ball evenly.
I had to touch this area as well. During my LE troubleshooting, it did appear that the ball wasn't resting evenly in said launch fork. I did end up "opening" mine a bit. Then IIRC I also made some other alignment adjustments in that part of the mechanism to ensure the ball started on a straight path to begin with. However, after much frustration bending this way and that, I think I ended up making matters worse. At the time, my LE was still under warranty so Stern kindly ended up sending me an entire new shooter assembly.
Other factors and things that helped me overcome the issue:
- Divot in the shooter lane wood: Over less than a year of owning my LE, a divot began to form in the wood -- Created over time as the ball pops out of the trough. I believe this wear happened so quickly b/c my LE's wood wasn't well coated (PHOTO). I also believe it was contributing to the issue of the ball not being sent on a straight path out the gate. So I at first bought one of those plastic lane protectors. But I felt that wasn't helping, possibly making matters worse. So in the end I installed Cliffy's metal lane protector (photo HERE by another pinsider). I highly recommend this as for me, it's keeping that divot from growing and also helping to align the direction of the ball out the gate.
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Half-pipe PF screws: In addition to plunging rejects, I also had a lot when shooting the ball from the left flipper to the halfpipe. So in addition, I replaced the two more rounded-top, stock screws where the half-pipe connects to the PF, with flatter-top screws (similar to the stock screws at the end of the metal lane fork).
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Cliffy's carbon fiber ramp entrance protectors: Unsure if the half-pipe one has made a difference as far as rejects but I recommend getting the whole kit anyway as pictured HERE on his website.
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Magnetized / not well-formed Balls: Others might think I'm crazy to say this... but after more meticulous testing I narrowed remaining issues down to the balls themselves. During more shooter testing I started keeping track of / noting which of the 6 balls rejected most often. I found that 2 of the balls would reject like 80% of the time, whereas the other 4 would almost never reject. My tech at the time (who was just as baffled as me throughout all the fix attempts) determined that it must be a magnetizing issue with those 2 balls in particular. In other words, the magnetic buildup on those balls was enough to pull them just enough off of their direct path up the metal lane and into the halfpipe. I suppose it was either that or maybe those 2 balls were not as "well-formed" as the others, difficult to know for sure. In any case, I replaced those 2 balls with new ones and BAM! rejects cut down immensely.
Nowadays with all those changes, both shots to the half-pipe and launches are far more consistent for me. Sometimes 1 reject for every 25 shots, other times no rejects up to 50. Hope this helps, thanks for reading!