(Topic ID: 246507)

Is there a reason a leaf switch can't replace a micro switch?


By harryhoudini

7 months ago



Topic Stats

  • 13 posts
  • 8 Pinsiders participating
  • Latest reply 7 months ago by harryhoudini
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    #1 7 months ago

    I know micro switches have 3 terminals, which I am sort of thinking are NO, NC and COM? So it seems like that could be mechanically replicated with a leaf switch (physically closed and gets pushed open or physically open and gets pushed closed). I don't know exactly what the diode does for the micro switches (seems they mostly use them) and if that is an issue that prevents a leaf switch from being used. Is it longevity? Being able to have the wireform to fit a specific location (micro switch)?

    I guess my question is, can I replace a micro switch with a leaf switch?

    #2 7 months ago

    I think so, but with a diode.

    #3 7 months ago
    Quoted from harryhoudini:

    I guess my question is, can I replace a micro switch with a leaf switch?

    Sure can. A Microswitch is just a switch in a different form factor. Of course you'll have to add second isolated terminal if you want to mount the other end of the diode if using it in the switch matrix.

    Pop bumpers on modern games are leaf switches connected to the switch matrix. Look at those for an idea. Some Stern/Sega and DE games mounted diodes under the playfield. Ran the wires to the diodes mounted to the playfield and then to switches or lamps connected to the matrix rather than the diode being right on the device.

    #4 7 months ago
    Quoted from schudel5:

    Sure can. A Microswitch is just a switch in a different form factor. Of course you'll have to add second isolated terminal if you want to mount the other end of the diode if using it in the switch matrix.
    Pop bumpers on modern games are leaf switches connected to the switch matrix. Look at those for an idea. Some Stern/Sega and DE games mounted diodes under the playfield. Ran the wires to the diodes mounted to the playfield and then to switches or lamps connected to the matrix rather than the diode being right on the device.

    Thank ye!

    #7 7 months ago

    Could there be de-bounce issues? Leaf switches might not be as consistent as a micro switch. Depending on the application a capacitor might be helpful too.

    #8 7 months ago

    This is for a rollover on a ramp, so I would imagine it would be fairly instant and momentary.

    #9 7 months ago

    Why not just use the proper switch? Just curious.

    #10 7 months ago

    Working on a mod, need to relocate a switch, space is limited, most micro switches don't seem to come in a format that allows for more flat mounting like a leaf switch can be. Found a few right angle ones but even still they require a lot of vertical space. Easy to build a 3D part to cover the blade on a leaf switch.

    #11 7 months ago

    As others noted, yes you can replace micros with leafs. The diode is needed in most cases (if the original switch had it, your replaced leaf will too).

    Leaf switches are leaps and bounds more reliable over the long haul vs. micros I've replaced some high use micro switches with leafs for a couple of reasons (chief of which is: I needed to replace one and a leaf is what I had available) - another good reason is they are more easily tuneable (you can adjust the blades anyway you like vs. just bending the wireform or arm on a micro).

    I would never change leafs to microswitches in early SS but to each their own. Most problems with early SS games with leafs arise from someone filing them in the past removing the gold plating - they will never be 100% reliable after that occurs.

    #12 7 months ago

    The goldflash contacts have a life cycle as well. After almost 40 years the used-to-be smooth surfaces have banged into each other 100s of 1000s of times. Gold being soft, it will get worn and misshapen, leading to intermittent response. At that point the switch is bad and should be replaced, so you're not losing anything by running some 2K grit across the points instead of a dollar bill or similar. It might last a while, might not.

    #13 7 months ago

    Thanks guys, appreciate all the input!

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