x axis not moving - blown fuse shorted FET


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Thread: x axis not moving - blown fuse shorted FET

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    Default x axis not moving - blown fuse shorted FET

    I have an Ajax CNC mill with a Centroid all in dc control (Linux version). Hit the end of travel on the X axis today and suddenly the X axis is dead - will not jog - nothing. Started digging and found a blown fuse swapped fuses between X and Y axis and then both would not move. Blew two fuses. in the X axis. Started looking arond with the ohm meter and have at least one shorted power FET - Since this machine has a 4th axis that I do not use I pulled it to see what part number the FET's are. Looks like IXYS 42n20. About 11.50 each from DigiKey - in stock - already ordered 4. My question is there looks like a FET driver chip for each FET. Anyone have any experience repairing one of these boards? The part number on the chip does not come up in a search The markings are A 3101 0323. Hoping the shorted FET didn't take any of these out with them -

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    Default Re: x axis not moving - blown fuse shorted FET

    Got the 4 FET's replaced - glad I have a decent desoldering setup. Looks like I'm back in business.



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x axis not moving - blown fuse shorted FET

x axis not moving - blown fuse shorted FET

x axis not moving - blown fuse shorted FET