Problem with Erskine unit on Bridgeport.
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  1. #1
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    Default Problem with Erskine unit on Bridgeport.

    Morning,

    Our powerfeed on the X axis of our Bridgeport isn't working.

    There is a 110v supply to the Erskine unit, which reads ok, although the transformer was pretty hot this morning. No idea what it's normal temperature is.

    The potentioneter goes from 0-50k ohms as if it is new.

    The fast travel button shorts out the pot, as expected.

    Both microswitches have been tested at the crimps just below the mircoswitches, both has 1x NO & 1x NC contacts, all good. When connected back up, they seem to switch polatity as they should.

    All cables have been tested end to end, and between each other. All good.

    Motor armature and field have resistances that you'd expect (I've forgotten readings!).

    Reset button in Erskine unit has been pressed possibly a hundreds times!

    When powered on (switch for powerfeed on, main on button pressed & direction selected via lever connected to microswitches), there is no voltage to microswitches from Erskine unit, nor any voltage to armature or field.

    Any advice please?

    I'm presuming it's a new Erskine unit needed?

  2. #2
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  3. #3
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    Sorted machine sales in Bristol do these on an exchange basis if thats any help?
    Erskine Control Unit Service Exchange


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