I'm planning on building a JGRO-a-like, but with some minor mods.
It looks like most people on the site use Nema 17 - 23 size (100-200 oz/in, 8-16 kg/cm Holding Torque) motors for the build. I'm curious to know what is the smallest motor that can be used to drive the JGRO at a reasonable speed without loosing steps? Will cheap 2.1kg/cm work?
Another query I have is the fact that everyone seems to be using 24V power supplies, but most of the motors like the one mentioned above are rated 3V - 6V to run at about 1A - 2A... Can someone please explain?