Re: [CAD_CAM_EDM_DRO] Dead encoder???

On 10/12/06, Marcus <implmex@...> wrote:
>
> Hi All:
> I have a brand new problem with my Defiance 3 axis CNC mill that I'm
> hoping one of you can help me out with.
> It's a servo machine, with a DX32 (Bridgeport) PC based controller.
> Today, it started faulting out part way through a program...it gave me a
> following error message.
> The control thinks there's an obstruction that's making the table lag
> behind
> the commanded position.
> The machine boots up and homes normally when it's cold; it will also run
> part way through a program, and then it quits.
> It always quits at a different place in the program, so it's not the code.
> As the machine warms up, the fault will occur sooner and sooner, and
> eventually the machine won't even home anymore.
> Nothing is mechanically wrong so far as I can tell, and I can jog all
> three
> axes from limit to limit using the manual pulse generator.
> I can't tell from the error message which axis is tripping the shutdown,
> but
> when the machine is warm enough to fault during the homing sequence, it's
> the X axis that trips it.
> How would I begin to narrow down the problem?
> The machine is an orphan; Defiance Corporation no longer exists, so I'm on
>
> my own with this one.
> Could this be an axis encoder?
> Is it more likely a board ?
> How would I differentiate and pin this puppy down.
> I can give it pulses using the manual pulse generator, and it responds to
> those...does that make it more likely to be an encoder?
> Any and all help will be greatly appreciated.
> Cheers
>
> Marcus
>
>
>


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