Resharpen wire chopper Mits FA20
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  1. #1
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    Default Resharpen wire chopper Mits FA20

    Looks like we could grind the carbide blades between centers and lower the bushing by however much we grid off the blades. Anyone done it? Any tricks I should know about? We have already reversed the blades in the housing to expose a fresh edge of the blades, but you can only do it once as far as I can tell. Our newest Fanuc wire doesn't have a chopper (first wire EDM I've ever had that doesn't) and other than the used wire being harder to handle, I don't see any down side to not having one. Avoids a whole maintenance issue.

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    Why don't you just buy a new unit? They are £300.00 here in the UK, they last for a couple of years, that's only 1/2 of a £ per day.

  3. #3
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    Work is fairly slow in the shop, if I can save $400.00 (the cost here) with a few hours work, its worth it to me.

  4. #4
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    Our shop manager removed the chopper off of our Mits shortly after it was purchased. He was afraid it would cause problems. The wire just runs into a large tub.

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    We removed the choppers from our machines as well. Too much of a hassle.

  6. #6
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    Does the wire lay flat and coil, or just end up in a huge birds nest and short out? When chopper fails on our machine its the latter. Maybe without the unit on it would act differently.

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    Quote Originally Posted by RJT View Post
    Does the wire lay flat and coil, or just end up in a huge birds nest and short out? When chopper fails on our machine its the latter. Maybe without the unit on it would act differently.
    We have a plastic bin behind our Makino it comes out and lays flat for the most part. As long as you empty it each week never seems to be an issue


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