Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
mosfets [2020/10/19 06:12]
mrscott Capitalize MOSFET.
mosfets [2020/10/22 06:42]
mrscott Clarify load connection and operation.
Line 9: Line 9:
 </html> </html>
  
 +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.
  
-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.+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 : 
Line 30: Line 31:
 MOSFETs list :  MOSFETs list : 
  
-Mosfet group ^ Mosfet name        ^ Controlling pin ^ Output connector ^ Input method                 ^ Voltage ^ Current    ^ +MOSFET group ^ MOSFET name        ^ Controlling pin ^ Output connector ^ Input method                 ^ Voltage ^ Current    ^ 
-| Big mosfets   | First big mosfet    | <kbd>2.7</kbd>          | X15               | Big mosfets power input X13   | 12-24V   | 12.5A max   | +| Big MOSFETs   | First big MOSFET    | <kbd>2.7</kbd>          | X15               | Big MOSFETs power input X13   | 12-24V   | 12.5A max   | 
-| Big mosfets   | Second big mosfet   | <kbd>2.5</kbd>          | X10               | Big mosfets power input X13   | 12-24V   | 12.5A max   | +| Big MOSFETs   | Second big MOSFET   | <kbd>2.5</kbd>          | X10               | Big MOSFETs power input X13   | 12-24V   | 12.5A max   | 
-| Small mosfets | First small mosfet  | <kbd>2.4</kbd>          | X7                | Small mosfets power input X6  | 12-24V   | 3A max      | +| Small MOSFETs | First small MOSFET  | <kbd>2.4</kbd>          | X7                | Small MOSFETs power input X6  | 12-24V   | 3A max      | 
-| Small mosfets | Second small mosfet | <kbd>2.6</kbd>          | X8                | Small mosfets power input X6  | 12-24V   | 3A max      | +| Small MOSFETs | Second small MOSFET | <kbd>2.6</kbd>          | X8                | Small MOSFETs power input X6  | 12-24V   | 3A max      | 
-| Mixed mosfets | Third big mosfet    | <kbd>1.23</kbd>         | X16               | VBB ( motor ) input           | 12-24V   | 12.5A max   | +| Mixed MOSFETs | Third big MOSFET    | <kbd>1.23</kbd>         | X16               | VBB ( motor ) input           | 12-24V   | 12.5A max   | 
-| Mixed mosfets | Third small mosfet  | <kbd>1.22</kbd>         | X9                | VBB ( motor ) input           | 12-24V   | 3A max      |+| Mixed MOSFETs | Third small MOSFET  | <kbd>1.22</kbd>         | X9                | VBB ( motor ) input           | 12-24V   | 3A max      |
  
-Mosfets diagram : +MOSFETs diagram : 
 <html> <html>
 <image src='http://arthurwolf.github.io/smoothieboard-graphics/schematics/mosfet-input-output.svg' width='100%'> <image src='http://arthurwolf.github.io/smoothieboard-graphics/schematics/mosfet-input-output.svg' width='100%'>