Stepper Motors ??

Hi,

I am currently building a Mendel. I ran into a small problem here. I am looking for the stepper motors that should be used. Is there any certain specs.

As far as I know that what really matters is the frame size, either a NEMA 17 or NEMA 14 motor. Also the torque should be 1400 g-cm or more. What about other factors such as the stepping angle size, weight of the motor, the voltage. I have seen a lot of people posting various motors with various specs.

I am looking for a decent motor, which would give me the best printing quality. So what are the important factors I am looking to??

Another thing !! I have known that the lower the step angle, the better. However, I don't think it is irreparable if the step angle is 1.8deg/step or even 3.6deg/step.I believe the stepper motor drivers are capable of micro-stepping. Meaning, it can control the current going to the phases of the stepper, allowing it to accurately do half or even quarter stepping. IS THAT POSSIBLE To BE DONE in A mendel ??


Thanks,
Khaled

I ordered in six different motor samples for testing.... five of them worked. The only one that didn't work is a motor that had no specs published. Some of the motors that worked also had no specs published (just the physical size, number of wires, and 1.8degrees per step)

my favorite is a nema 17 motor that didn't have much for specs published, it works like a charm, with plenty of torque, the only drawback is that it only has 6" long wires (usually not a problem... but it could be)

anyway. If you want to see my post for those motors for sale, see the for sale forum.