Re: Servo Direct Drive?
A little misleading, for a given frame size steppers are usually have more torque, but the torque curve for a servo and stepper of the same torque, the servo is superior, this is due to the relatively flat continuous torque curve that is maximum at zero rpm right up to the max. rated rpm.
Whereas the stepper torque curve drops off rapidly as rpm increase, there are steps to overcome this in the drive, by maintaining the rated current, but still lower top end rpm torque compared to a servo.
As previously stated, the higher max rpm of a servo allows a more economical frame and drive size to be applied when some kind of gearing is used.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.