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EMI Ferrite and GRBL

Discussion in 'Laser Cutters' started by syl, Mar 9, 2019.

  1. syl

    syl Well-Known
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  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Ferrites help filter high frequency EMI very succesfully.
    But a good RC filter as a first line defense is even better: Solving Endstop Woes with a Simple Analog Filter

    both together - can run withing half a meter away from my cheap junk plasma inverter with HF start (;
     
  3. syl

    syl Well-Known
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  4. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Blackbox supports inductives natively, plug and play! Check the documentation :) docs.openbuilds.com/blackbox

    No need for a adapter kit as in that link! Expensive! We added the components onboard already (why they charge $70 for $3-6 sensor, and diode or two resistors, plug and 3d printed box (maybe another $0.60) baffles me. Faith in humanity lost lol. We added them onboard for you as its literally a few 0.01s lol
     
  5. syl

    syl Well-Known
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    Thank you Peter!

    BTW are inductive sensors susceptible to emi interference like the mechanical endstops?
     
  6. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    About the same, its the wires that act like antennas (;

    But the Blackbox filters basic EMI via an onboard RC filter (;
     
  7. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Well, about the same can be rephrased to, about the same as properly wired mechanicals... Depending on the type and config, inductives might be way better come to think if it.
     

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