I had people over to play pins this past weekend. Whirlwind developed three issues. Two of the three are solved. Any suggestions for #3 below would be appreciated.
1. The left flipper stopped working. I recently brought back the WW from TPF and had just completed rebuilding the flippers (upgrading to the Fliptronics style).
Diagnosis: The new end of stroke switch was not making good contact. After burnishing the contacts, everything was back to normal.
2. The three spinning discs were slow, and would stop spinning when touched.
Checked: fuses were good, the motor was receiving power, and there were no cracked solder joints on the 10 Ω ceramic resistor located on the motor controller pcb. Diagnosis: both set screws (#02-4419) in the pinion gear were backed out from the shaft. See pictures below for detail of the location of the set screws. To access them, you will need to remove compass arrow circuit board lamp assembly. See pictures below.
3. Right orbit spinner not registering each rotation of the spinner.
Checked: Switch edge test working properly for the spinner.
Adjustments: I removed the switch and ran it through an ultrasonic bath with citrus based cleaner to remove out 20+ years of gunk - reinstalled and verified switch registered properly. The blade was adjusted so that the slightest rotation of the spinner target would cause the switch to register. The spinner points of contact (arms and shaft & switch blade) were lightly lubricated with spout oil.
Result: When a ball rips through the spinner, not every rotation registers as a switch hit. I am not sure if there is too much internal wear and therefore friction within the switch and/or the spinner shaft and switch blade have too much friction.
Any suggestions would be appreciated. I'll put a new switch on the shopping list.
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