Hi,
I am trying to figure out the current limit for one motor on the rambo v1.3 board.
I found the specs below on the reprap site.
I can't determine if the 5 amp limitation below is cumulative or is it for each stepper driver?
I am assuming it's 5 amps cumulative because if a dual extruder setup was used then 5 stepper motors can be used
and that's a total of a possible 25 amps that the board would have to support and that's not including a heated bed.
Also the rated voltage seems to be confusing since I am running stepper motors rated at 4.2 volts and 1.5 amps.
For a dual extruder setup that would mean I can be using a total of 7.5 amps (so I am assuming at that point I use a 10 amp fuse)
What I don't understand is can a lower voltage motor be used based on the 12 volt rating shown below for the rambo board.
[
reprap.org]
Three independent power rails for flexible input power configurations
Heated Bed, 15A 12-35V
Extruders + fans and logic, 5A 12-35V (fuse can be exchanged for up to 10A capacity)
Motors,
5A 12-28V (fuse can be exchanged for up to 10A capacity)
Built in SMPS for 5V generation from Extruders + fans and logic
