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  1. 06-12-2017 #3
    PaisleyPCdoctor's Avatar
    Lives in Paisley, United Kingdom.
    PaisleyPCdoctor
    Last Activity: 17-06-2018 Has been a member for 7-8 years. Has a total post count of 95. Received thanks 8 times, giving thanks to others 22 times.
    Second (and probably the biggest of the lot)- SHIELDING- or lack of it!

    Absolutely nothing is shielded not even the VFD cable!

    I started with external cables to Spindle and Stepper motors.

    Supplied VFD cable looks nice flexible rubber 'pond flex' cable. It's plain unshielded 0.75mm2 3 core and earth. The earth wire IS connected to spindle (thank god), but no shielding.

    I replaced the entire cable with shielded 1.5mm2 CY control cable. To be extra careful, I also added external copper braid shield. It's now double screened.

    I didnt replace the stepper cable, I suply added a copper braid sleeving to the entire length. Obviously, the sleeve is connected to earth....

    Actually, no. The aviation connector barrel on the chassis is making contact with paint, not metal. NO EARTH CONNECTION! I had to scrape off paint inside the case to sort that.

    Next job is shielding the cables inside the control box, then probably moving VFD to its own enclosure.

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    Last edited by PaisleyPCdoctor; 06-12-2017 at 09:06 PM.
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