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  1. #21
    what is EMI Clive ?

  2. #22
    EMI is Electromagnetic interference

    Is it just the new axis driver that's moving on its own ?

    does your break out board look like this TX14175
    Click image for larger version. 

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    John

  3. #23
    Quote Originally Posted by Clive S View Post
    Then that sounds like EMI
    Clive is spot on here.
    The EMI often tracks up the mains lead from the spindle motor/driver and back down the lead to the PSU for the control system, separating the two to plug-in points opposite ends of the ring main can help, or running the spindle motor/driver from the furthest possible socket via an extension lead.
    Ideally you'd fit separate EMI filters to the mains inputs close to the equipment.
    You think that's too expensive? You're not a Model Engineer are you? :D

  4. #24
    thanks for the replies. i did a quick search and found these

    https://www.cnc4you.co.uk/Electrical...FI-Suppression

  5. #25
    They should work, but if you have any particularly sensitive drivers they might still jitter a bit, I had some particularly sensitive drivers and ended up using filters and the long lead to a remote plug trick ;-)
    Last edited by magicniner; 29-05-2019 at 06:15 PM.
    You think that's too expensive? You're not a Model Engineer are you? :D

  6. #26
    I am going to just throw in a blanket response here.
    We have a 6040 CNCEST parallel (TX14175 BOB) and started to have Z problems intermittently.
    At some point I discovered that the stepper wire on the gantry was janky; you could wiggle the wire
    and the stepper would change tone. We cut out a section of the black 4-wire where it doubled back on
    the drag chain, and spliced in a proper section and it fixed it. Then it started to do it again about a week later.
    On closer inspection, I found on of the four wires from the motor itself where it went into the connector was
    hanging by a thread because it had been over-crimped at the factory, so only one tiny filament was making contact
    and that was actually separated and only mechanically touching the crimp of the pin.
    We replaced the motor connector with a proper Molex 4-pin aviation connector and no problem.
    Later it happened again, this time on the gantry axis, and when continuity testing with a multimeter, we found one of
    the runs (on the gantry (Y)) had one wire broken inside 'somewhere'.
    That was the last straw, so we replaces ALL the wire runs from the controller with PROPER aviation 4-C shielded wire
    from the controller to each motor AND replaced ALL the remaining motor connectors to get rid of the HORRIBLE Chinese wire.
    There was more to the troubleshooting nightmare, including swapping stepper drivers, AND purchasing a used TX14207 stepper driver
    off eBay because we 'thought' the stepper driver was the fault (it was not).
    So sharing this lesson before you tear all your hair out in futility.
    -Christian

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