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IndustryArena Forum > CNC Electronics > CNC Machine Related Electronics > Need help with noise on limit switch cables. Elco or AC cap?
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  1. #1
    Join Date
    Aug 2007
    Posts
    5

    Need help with noise on limit switch cables. Elco or AC cap?

    I am currently working on a machine with a lot of noice on the limit switch cables and the swicthes are trigered once every few seconds. I have used the search function on the forum and came up with the solution that you need to put a capacitor over the input and gnd with 0.1uF capacity.

    The question i have is is this capacitor a DC Elco capacitor or a AC capacitor. In my collegue years we have looked at a schematic of a power supply and there i think the elco was for buffering and the normal cap for filtering but i am not shure anymore.

  2. #2
    Join Date
    Aug 2007
    Posts
    5
    The condensator i have in mind is the FKS3 will this be ok to use?

  3. #3
    Join Date
    Jan 2005
    Posts
    15362
    Hi riva

    Put shielded cables in & ground one end of the shield only normally the input end leave the switch end unconnected & trimmed
    Mactec54

  4. #4
    Join Date
    Aug 2007
    Posts
    5
    I already planned to put shielded cable on the machene but also want to put some capacitors in thetoolbox so if there is still noise on the lines i can filter it out but for this i need to now if it are DC elco capacitors or AC capacitors.

  5. #5
    Join Date
    May 2006
    Posts
    1469
    Cap like this. It will have "104" on it.
    Attached Thumbnails Attached Thumbnails cap.jpg  

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