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IndustryArena Forum > Machine Controllers Software and Solutions > UCCNC Control Software > Intermittent Issue With Z Probing Direction - UCCNC & UC300ETH-LPT5
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  1. #1
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    Intermittent Issue With Z Probing Direction - UCCNC & UC300ETH-LPT5

    Using a CNCRouterParts PRO4848, I recently converted from the standard Smoothstepper/Mach3 to UCCNC and the UC300ETH-LPT5 with UCCNC Screenset 2017. I'm using the probing macro supplied in this thread...

    https://www.cnczone.com/forums/cnc-r...-software.html

    Conversion was fairly uneventful and everything initially work very well. A few weeks ago, I was measuring tool length using "Auto Zero Initialize" and the tool started moving upwards. I checked all the setting and confirmed that nothing changed. Restarted UCCNC with no change. Shut down and restarted everything and still had the same problem. I needed to cut a project , so I just set the Z-workpiece manually. Everything cut fine, so I'm sure it's strictly a probing based issue. When I tried again a few days later, probing worked as expected. Well it happened again yesterday and I'm scratching my head. Any ideas?

  2. #2
    Community Moderator ger21's Avatar
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    Re: Intermittent Issue With Z Probing Direction - UCCNC & UC300ETH-LPT5

    So, it worked fine for a while, and then started going backwards?

    Did anything change in your system?
    Do you by chance have a CNC Drive pendant? A small number of people with these pendants have had issues with the probing macros.

    I don't believe I've ever heard of this happening to anyone.

    The way the probing works, is the macro first reads the Z axis DRO. It then subtracts the Firs Probe Distance, and tells the machine to probe to that position. So it should always probe downwards.

    When it's moving up, is the Z axis DRO value increasing?

    Do you ever have any other issues with Z axis direction? A bad connection on the Z axis dir wire could possibly cause this.

    Can you post a screenshot of the Auto Zero settings, and the run screen DRO's when you start to probe?
    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

  3. #3
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    Re: Intermittent Issue With Z Probing Direction - UCCNC & UC300ETH-LPT5

    Quote Originally Posted by ger21 View Post
    ...Do you by chance have a CNC Drive pendant? A small number of people with these pendants have had issues with the probing macros....
    Thanks for the reply Gerry. I really like your Screenset.

    Yes. I am using a VistaCNC iMach3 P4-S. I hadn't thought of this as a possible cause. I do use the pendant to move to the tool measurement position. Have you seen any resolution to the probing macro when used with a pendant?

    DRO values work as expected.

  4. #4
    Community Moderator ger21's Avatar
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    Re: Intermittent Issue With Z Probing Direction - UCCNC & UC300ETH-LPT5

    Try disabling the pendant plugin and see if the probing will then work correctly. Restart UCCNC after disabling the pendant.
    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

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