Robot 5-DOF on Raspberry Pi

I have a 3D printed robot, 5-DOF (Melfa based) I'm planning on running off a Rasberry Pi 4, running Axis or similar GUI, visMach, over Ethernet to a Mesa card. 

Am I asking too much of a Pi?  What memory size would I need, knowing more is better but not always necessary. 

 

If you have a Rpi4 give it a go.

If you have the choice between a 5 and a 4 go for the 5.

If you do go for the 5, I'd suggest against using the Rpi5 image, as much as Rodw has put into it there are some nice things missing, installing Linuxcnc & a RT kernel isn't that hard on a Raspios image.Actually building Linuxcnc on the RPi5 is pretty quick, if you need to go that way.

If you haven't got a Raspberry Pi on hand and space isn't a issue you'll get more bang for buck with SFF system.