Hi all, I have yet another PS_On Question!
My cooling fans are always on, and I tend to run prints while I'm away at work, so I want to kill the power supply at the end of my prints.
I want to power my Mega off the +5V Standby line from the PS, and have the mega switch the main 12V lines on the PS. The On/Off rocker switch S1 on the control panel switches the Mega/LCD/PS Off.
The 5V line from the PS is regulated, but I'd prefer to run it through the Megas regulator before going on to the mega board, just in case I accidentally connect a +12V to it / short it / whatever, so I want to use the Vin pin rather than the 5V Pin.
Firstly, am I right in thinking the +5V pin on the Mega is on the board side of the voltage regulator, whereas the Vin pin is regulated down to 5V and then outputted onto the 5V line?
My proposed wiring diagram is here:
![s210.photobucket.com]( "s210.photobucket.com")
So I'd turn on the Rocker to power the Mega, then navigate through the Menus on the LCD Screen to turn on the Power Supply, at which time the PS goes on, and the +12V lines going into the RAMPS would go high, turning on the Fans and Print bed lighting etc.
Then at the end of the print, I'll use a G4 S180 command to wait 3 minutes for the hot end to cool before the fans and lighting switch off again (I don't want to get heat soaking back up the hot end and giving me extrusion problems on start-up)
I'm thinking if D1 is on my board I can leave it in, since I'm wiring onto the forward side of the diode anyway, so my +5V won't back-feed the RAMPS.
Alternatively, I can put the +5V switched via S1 into a barrel connector and put that into the Mega power jack, which will go into the regulator and then power the board? This may be a more elegant solution than soldering a line under my stepper drivers onto D1.
Will i kill my board (again 8-) ) wiring it like this? And will powering up the mega give the LCD power and allow me to navigate the menus and switch PS_ON ?
Thanks in advance guys:)
My cooling fans are always on, and I tend to run prints while I'm away at work, so I want to kill the power supply at the end of my prints.
I want to power my Mega off the +5V Standby line from the PS, and have the mega switch the main 12V lines on the PS. The On/Off rocker switch S1 on the control panel switches the Mega/LCD/PS Off.
The 5V line from the PS is regulated, but I'd prefer to run it through the Megas regulator before going on to the mega board, just in case I accidentally connect a +12V to it / short it / whatever, so I want to use the Vin pin rather than the 5V Pin.
Firstly, am I right in thinking the +5V pin on the Mega is on the board side of the voltage regulator, whereas the Vin pin is regulated down to 5V and then outputted onto the 5V line?
My proposed wiring diagram is here:
So I'd turn on the Rocker to power the Mega, then navigate through the Menus on the LCD Screen to turn on the Power Supply, at which time the PS goes on, and the +12V lines going into the RAMPS would go high, turning on the Fans and Print bed lighting etc.
Then at the end of the print, I'll use a G4 S180 command to wait 3 minutes for the hot end to cool before the fans and lighting switch off again (I don't want to get heat soaking back up the hot end and giving me extrusion problems on start-up)
I'm thinking if D1 is on my board I can leave it in, since I'm wiring onto the forward side of the diode anyway, so my +5V won't back-feed the RAMPS.
Alternatively, I can put the +5V switched via S1 into a barrel connector and put that into the Mega power jack, which will go into the regulator and then power the board? This may be a more elegant solution than soldering a line under my stepper drivers onto D1.
Will i kill my board (again 8-) ) wiring it like this? And will powering up the mega give the LCD power and allow me to navigate the menus and switch PS_ON ?
Thanks in advance guys:)