* I have asked on the Remora part of the forum if the RP2040 based system (which sounds great!) is ready for prime time and I have had no responses since posting it a couple of weeks ago. Is the impression I am left with which is that it is not ready and the enthusiam for it has died out?
I saw your post on the in the Remora forum a week ago. I think that the port to RP2040 is not as developed as other port; one reason is probably that there are only few 3D printer control boards based on this mcu. As Scotta wrote in the post:
scotta post=344968 userid=24854
"This Remora port was a hotel room project when I was travelling for work."
I played a bit with it, mainly because I had some rp2040 around, but never used it to move physical axis. That's the next thing; if you want to interact with real world, a Pico might not be enough. You'll need some buffer and optocouplers. And this is something you get out of the box with the Mesa card. I guess you could also try the PicoCNC board designed for grblHAL and put Remora on it, but it's not that cheap anymore either.
For the RP2040 there's also a component called stepper-ninja that might interest you. But again, you'll not find the maturity of Mesa cards there. Really depends what you plan to do with it.
And if you go with a RPi, yo can also design a HAT for it with some SPI drivers; I designed one with TMC5160 drivers on the top and wrote a LinuxCNC component to send target velocity over SPI; I probably wouldn't use this as is on a CNC mill, but I have a Galvo Laser engraver that is mounted on a 3 axis system, which are connected to that HAT. It's been a year now and never had issue with it, but I only use it more or less an hour per week.
