(what stands NEMA for?)
National Electrical Manufacturers Association
> Can these motors drive the threaded rods direct?
YES
The nice thing about having a standard for motors, NEMA23 or
otherwise is that you can get a larger, more powerful motor and it
will fit in directly.
as a kinda-sorta general rule of thumb, a round body NEMA23 motor
that is roughly 2.3 inches long is a SINGLE STACK and has about 50-
oz in toruque.
a unit that is about 5 inches long and round body is about 100 in-oz
torque.
The newer motors have a more square body, not round and are often
much higher tourque.
And look on the net for drivers.
the linistepper seems a board that fits our group nicely.
also, check the Allegro A3977 chip. very simple.
Dave