Board that remove the noise coming from limit switches in order to eliminate all the false positive signal.Designed by Late Night Works in Italy
I designed this board in order to eliminate all the false positive that my CNCcontroller board receives from mechanical switches during normal operation because of electromagnetical interferencies ...Read More…
I designed this board in order to eliminate all the false positive that my CNCcontroller board receives from mechanical switches during normal operation because of electromagnetical interferencies or vibration.
This board implement a noise filtering system in order to have a clear output signal when hard limits are triggered ignoring noise and all the weak signal that will cause otherwise false positive. This feature is provided by the cores of this board: optocouplers. They provide:
physical isolation between switches and controller board because of there is no direct galvanic connection
filtering effect because are current driven element so they require a huge energy from the noise to pass and that means that in normal operating conditions, optocouplers cut out all the noise. Short glitches will not pass at all.
How it works? When the couple of pins of the desired axis are wired together (so, contact is closed), the diode will turn on and the light will activate the base of phototransistor in order to get it into conduction. In the other hand, output pin of corresponding axis will put LOW, otherwise it will remain HIGH thanks to a pullup resistor.
Suitable for every kind of switches.
If you are looking for stable limit switches that cant't be affected by noise, you can look at those Magnetic Limit Switches !
For more detailed information please check the datasheet attached. If you have some question, feel free to contact me.
Available in two versions:
I USUALLY SHIP IN MOST COMMON DESTINATION BUT IF YOUR COUNTRY IS NOT ON MY LIST, PLEASE CONTACT ME FOR FINDING THE BEST SOLUTION.
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Poste Italiane: Standard Ground Rate
Poste Italiane: Standard Ground Rate +tracking
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