Williams flipper assemblies

[CrazyBite2007]

Hello,

I got all the hardware issues ironed out and am now working on connecting the flipper assemblies to the mosfet controller.

but I have an issue, with one of the flipper assemblies, and the seller is not yet willing to replace.

Can someone shed some light on the following issue?

I have got the left flipper assembly working on coil 0 and 1 for pulse and hold power. and it works with the setting of 25ms and .25 duty cycle.

coil 2 and 3 are used for the right flipper assembly afor pulse and hold power, with the same values as the left one. but this assembly only works on pulse, the hold is dead.

the working assembly has the following Ohm resistances.

between terminal 1 and 2 its 4.4 Ohm. (pulse power)

between terminal 1 and 3 its 123 Ohm. (hold power)

the not working assembly has the following Ohm resistances.

between terminal 1 and 2 its 4.4 Ohm. (pulse power)

between terminal 1 and 3 its 40-45 Ohm. (hold power)

the seller is stating that my soldering or wiring is the issue. but I think the coil is dead.

What can I do next? Did I miss something? Is the coil dead?

At least I got ONE working flipper now. Should have been two tho.

[Max Power]

Start by checking if those values are correct for your coils.

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[CrazyBite2007]

The values measured on the working assembly are pretty much in the ballpark. ~4 ohms for pulse and ~132 ohms for hold (measured without diode) mine measures 4.4 Ohms and 123 Ohms, but they are with diode.

The value for the not fully working assembly is 4.4 Ohms and 40 Ohms.

After exchanging some e-mails with the seller (that at first hides behind a no warranty statement, we trust the factory promise.) I can dissasemble the defective coil from the assembly and RMA send it for replacement.

Op dinsdag 17 juni 2025 om 20:41:01 UTC+2 schreef Max Power:

[Mike Pegg Bigg Deal Custom Guitars]

So what value size coils are you using, and what Era of williams flipper mechs do you have? I'm dealing with an issue of weak coils, and realized the coils are series rather than parallel wound. Your best case scenario is just order a nice strong matching set of new coils from pinball life, or marco specialties and replace both.
Here's a good list:
Fl1-11753 yellow - short flippers close shots
FL1-11722 green - close shots, and close drops
FL1 - 11630 red - standard common coil
FL1 - 15411 orange - long playfields and long shots
FL1 - 11629 blue- long shots, and mid to high ramps

I'm using the glues since I have long shots, and ramps, and can turn down coils.

To view this discussion visit https://groups.google.com/d/msgid/mpf-users/d888a6f0-b114-482e-8a66-5e262bec2cabn%40googlegroups.com.

[CrazyBite2007]

Thank you,

I'm not sure what "era" but on the site they are called this:  Flipper Assembly Left (right) - Williams PREMIUM CHROME EDITION

CODE: 50761  - SKU: A-15205-L  - EAN: A-15849-L

• Used in the following machines:

• The GETAWAY - High Speed II
• ADDAMS FAMILY
• BLACK ROSE
• DR WHO

etc.

I got the blue coils on the assemblies. Those are the 11-629 variants.

Op woensdag 18 juni 2025 om 00:56:02 UTC+2 schreef pegg...@gmail.com:

[cobra18t]

Do you have pictures of your wiring on the coil and controller side?

[Mike Pegg Bigg Deal Custom Guitars]

Those coilsnshould definitely have enough power unless they are the series wound instead of parallel wound. If they are the FL-23-606/39-2600 or equivalent blues then take them out, and order a set of the actual 11629s

To view this discussion visit https://groups.google.com/d/msgid/mpf-users/5b26577b-7ad5-4a6c-b806-8d258125a714n%40googlegroups.com.

[CrazyBite2007]

I got some pictures. I hope they are any good tho. (and tried to add them but it makes my post "too big")

3mb photo, makes post too big. sadface.

[CrazyBite2007]

Op donderdag 19 juni 2025 om 01:00:29 UTC+2 schreef CrazyBite2007:

[CrazyBite2007]

[CrazyBite2007]

Replacement recieved. It works fine! It measures correctly. So I installed it.

Video of measuring resistances (a bit boring to watch but I recorded it.) https://www.youtube.com/shorts/U1X1jq7vPdE

Op donderdag 19 juni 2025 om 01:06:43 UTC+2 schreef CrazyBite2007: