Arcade Collecting > Pinball
The Shadow
ChadTower:
Okay, got the parts... picked up 6 bushings and 6 coil stops. Don't need 6 but I don't want to have to find time to get over there when I do Black Knight either.
The new bushings are in the main flippers. After cleaning and new bushing, the right flipper is kicking serious ass. Now it's pounding parts so hard I want a little less power in it. :laugh2:
The left flipper is vastly improved but still not hitting the upper ramp as nicely as I'd like it. I'm going to see if I can't coax a bit more amperage into it. I did notice I didn't align the flipper bat perfectly so fixing that will add a bit. I'll clean the button optos, check the driver transistor, one or two other things. Beyond those it's pretty much replace the plunger/linkage and there's nothing else I can do.
So the machine is 100% functional now. Needs a cleaning/waxing and the video screen has some gassing. Good stuff, good stuff. :cheers:
ChadTower:
Hrm. Just pulled the flipper button opto PCBs so I could clean the optos. Sometimes dirty optos are a bit intermittent, fluctuating power to the flippers, making them weaker. Sitting the two boards side by side I noticed the two resistors are different on one than on the other.
So I whip out the DMM and test them. Sure enough, the PCB from the right flipper has resistors that match the schematic... but the PCB from the left has resistors roughly 50% stronger.
BOINK.
Seeing as how these flipper opto boards are pretty much just a pair of infrared sensors, a molex header/connector, and two resistors, those 50% overrated resistors would have a substantial effect on the power of that flipper. It would lower the power, to be exact.
So, I should replace those resistors with resistors at spec... or should I?
I've noticed, now that the flippers are working better, that the right flipper tends to slam the ---steaming pile of meadow muffin--- out of everything. It feeds the closer ramp and closer targets. I was thinking the other day that the optimal powering for these flippers would be full strength left (to hit the upper ramp) and lowered strength right.
What I have now is full strength right and lowered strength left. I think I will swap the two opto boards and see if that accomplishes the power mix...
ChadTower:
Swapped out the boards... no difference. My theory was mistaken. The experiment shows and my research bears out that changing those resistors has no effect at all on flipper power.
ChadTower:
Won a DMD on Ebay.
It's local, and about a third of the price for a new one, supposedly unused.
ClubNinja:
Nice!
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