Ok - I have a new I3v Makerfarm Prusa 8", I want to convert it to 24v. I have a 30 amp 24v power supply, a Mk2 heated bed for 24v, a 24v heater for my Hexagon Hot end and a 12v converter to run the fans.
What, if anything am I forgetting, overlooking, or is there any reason anyone knows it won’t work?
Check electronics board components for max voltage rating. There may be some caps with 12v max rating.
@Brian_Wilson Yes - caps are 35v - Thanks!
The voltage regulator on the Arduino is only rated up to 20V (absolute maximum). So make sure you snip the pin on the Ramps that reaches down to the Arduino’s Vin pin and either power it through USB or connect the output of your 12V converter to the Arduino’s Vin (or the Arduino’s power jack).
The Ardunio’s 5V rail supplies all of the printer’s logic, like the stepper drivers, endstops, thermistors, LCD and of course, the Arduino itself. So if you’re powering it from USB, make sure you use a good cable and a beefy supply (or a USB3 or charging port).
@Thomas_Sanladerer I had a feeling there was going to be something like that - Thanks! My other 24v printer never had that connection and always had to be plugged into the usb.
@Thomas_Sanladerer So it will not be bothered if I shove 12v into it instead of 5v?
Connect it to the power jack, not the USB.
@Doug_Rector , yes, the 12V is fine and the regulator will run a little hotter. 9V is optimum because you have to account for some voltage loss across the regulator. Like @Thomas_Sanladerer said, the voltage regulator will be toast at around 20V for an extended period of time.