BTT kraken support.
I would love to use RATOS but there is no config file for the BTT Kraken board yet. I have tried to go through the setup saying its a BTT Octopus board while loading the correct Kraken firmware from github onto the sd card. Consequently I have emptied the printer.cfg file and pasted the config.cfg from the BTT Kraken github.
Anybody got a clue on how to get the BTT Kraken working on RATOS?
8 Replies
I just recieved one the other day. What machine are you intending on running this on? You need at least 7.5A RMS rated steppers to make use of the first 4 drivers, anything less than that and litterally any of the other supported boards would've been a better choice (as long as you put in driverrs with a sensible sense resistor. 0.022 is too low for accurate microstepping on normal 3d printing steppers).
It's a custom V-Core 3.1 AWD machine. Running 48v, on LDO super powers. I mainly chose this board over the Octopus due to the better cooling of the stepper drivers without resorting to external drivers (which would in turn increase complexity).
There's absolutely no point in anything more than a decent fan to cool 5160 stepsticks with heatsinks when running the 2804's. Just how far past the stepper rating are you planning to push them, and who told you you need more driver cooling?
Granted, the 2804's have a torque problem, they're primarily useful on small machines to gain extra top end velocity. If it's acceleration you're after, the 2504AC's are a much better bet, and at 48V you'll have max torque up to around 800 mm/s where you'll struggle maintaining flow at any sane layer height anyway.
Ill be pushing them as fast as I can for prolonged prints, all steppers are actively cooled. Nobody told me to me to get more driver cooling, that's my own preference š
Interesting what you mention on the 2804's vs 2504AC's I do have a set of the 2504AC's laying around so I'll experiment with them. Flowrate will not be a problem for this printer though, I'm running a custom extruder/hotend combo that should be able to push around 150mm3/s, I'll show more on that in due time.
sounds interesting! I will add Kraken support at some point in 2.1.x, @MDFPereira is already working on it, just remember the caveats - you're gonna need nema36 or 42 to handle enough amps for accurate microstepping.
Iām interested in that custom hotend š
Taking care of it today.
Will send you a message š
Not yet š