Hi,
I’m currently running my Ultimaker off of a Megatronics V3 and am thinking about picking up a SmoothieBoard.
I’m a bit unclear on a few things though.
Right now, I have a 12v PSU running my hot end, and a 24v PSU for my heated bed. Can the SmoothieBoard work in that configuration? Can I power the hot end and the bed separately?
Also, the Megatronics has a bunch of extra 12v and 5v power outputs that I use for my hot end fan and a cooling fan for the board. They are not on a mosfet, they’re just always on. Does the SmoothieBoard have that functionality?
Thanks,
Chris
Imported from wikidot
On the Smoothieboard you can indeed run multiple power and voltage inputs… For example one configuration for the items you mention is this:
Connect the 24v supply to the “Power In 1” connector and then run your heat bed off of one of the big mosfets - P2.7 or P2.5. You will want to make sure that the power jumpers are not connected in this case.
For the 12v connection you would use that to power the main “VBB IN” to power the motors and the mixed mode outputs. The hotend would be connected to the big mosfet output on P1.23.
With the above configuration you will have a second 12v output on the small mosfet P1.22 for accessories such as fans, this could be controlled via GCode, triggered by a temperature on a thermistor or configured to be always on as needed.
If you also need to control 5v accessories you could run a 5v input to “Power IN 2” and then connect those accessories to P2.4 and P2.6.
Alternatively, if the items in question are always on you could just connect them directly to the 12v / 5v supply and simplify things.
Thanks! That’s extremely helpful.
As for running the always on fans, that’s exactly right. I can just run them from my 12v PSU. Sometimes it’s the simple things that escape me!