torque requirements

[prad]

hi!
i would like to use the FW 7344 to control a 48V linear stepper motor...the maximum load i would be applying is around 1N and my maximum displacement would be something around 0.5". could you give me any suggestions as to which motor i should use? would they all be compatible with the motion controller i have? i will be using a UMI 7764 and CENTENT CN0142 step drive...how do i find out my torque requirements?
i shall look forward to your advice...thank you very much in advance...
regards,
sailesh pradhan.

[Buechsenschuetz]

The torque finally yielded by the stepper motor highly depends on the motor design and can be varied by drive current variation. The latter usually is done by configuration pots or switches on the driver unit and NOT by the motion controller (unless you build some interface between the current control and the motion controller but this would be an unusual approach).

You should check the stepper motor's manufacturer data sheet for driver current/torque relationship. In any case, the drive current selected must not exceed the max drive current as stated by the motor manufacturer.

All motor driver units I have seen will accept the motor control signals supplied by the NI motion controller. In most cases they use step/direction signals but it is also possible to obtain clockwise/counterclockwise (CC/CCW) signals from the NI motion controllers.