While attending the KISS launch party issues were encountered with the VUK
First issue was the ball catching the back wall of the VUK and peening it.
Here you can see where the ball had been catching the VUK.With the bad camera its hard to see.
In this pic you can see the shiny "Peened" area
What causes this?
My first guess was the misalignment of VUK and its Popper unit but it goes further that that.
I believe its due to no ball aligning cup on the plunger. There is a fair amount of distance from the plunger tip to the VUK Shaft giving the ball plenty of room to move around on its upward travel.
A ball cup would keep the ball in line all the way to the VUK Shaft.
Issue two the ball would not register as being in the VUK Kickout hole
The switch simply stopped registering in switch test but was working fine with a DMM
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Issue three ball would eject weakly in gameplay but very strong in test mode.
Possible coding issue causes that?