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mosfets [2020/10/19 06:19]
mrscott Capitalize MOSFET.
mosfets [2020/10/22 06:42] (current)
mrscott Clarify load connection and operation.
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-Smoothie has up to 6 MOSFET controls ( 6 on 5X, 4 on 4X and 2 on 3X ). You have to connect ​your PSU to the power input connector for those FETs, and connect your power consuming element ( be it heating element, spindle, etc... ) to the power outputs of those same FETsEssentially ​Smoothie connects/​disconnects the element ​( connected to the MOSFET connector ) from the PSU ( connected to the power input connector ) as needed to maintain temperature or as requested by G-codes.+Smoothie has up to 6 MOSFET controls ( 6 on 5X, 4 on 4X and 2 on 3X ).  The MOSFETs act as switches ​to ground: ​ loads must be connected between the power source and the MOSFET switched terminal. ​ When the MOSFET is switched on, power will be applied to the load.  When the MOSFET is switched off, power will be removed, because one load terminal will be essentially disconnected and current cannot flow.  The exception being inductive load '​flyback'​ switching transients, discussed above. 
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 +Connect ​your PSU to the power input connector for those FETs (providing power to the load), and connect your power consuming element ( be it heating element, spindle, etc... ) between ​the power output terminal and the MOSFET terminal. Smoothie connects/​disconnects the element's ground ​as needed to maintain temperature or as requested by G-codes.
  
 There are three main pairs of MOSFETs on the board :  There are three main pairs of MOSFETs on the board :