If you are planning to move that large bed in the Y axis, a NEMA-17 motor won't do the job. They top out at about 100 oz in torque, which won't be enough to control the motion of a large, heavy bed unless you plan to print very slowly. You need to estimate the moving mass of the bed, undercarriage, heater, and belt, then decide on the speed/acceleration you want and the precision you want, and plug all those numbers into the motor sizing tools at Oriental Motor's web site. It will then calculate the required torque. You then shop for a motor that can deliver that torque, and then you look for the electronics that can drive the motor.
↧