Applied-motion STM23R-2ND Manual de usuario descargar pdf (Pagina 21)

STM23R Hardware Manual

920-0056C

5/5/2015

At lower step resolutions such as 200 steps/ rev (full step) and 400 steps/rev (half step),

motors run a lile rough and produce more audible noise than when they are micro-

stepped (2000 steps/rev and beyond). e STM23R includes a feature called “mic-

rostep emulation”, also called “step smoothing”, that can provide smooth motion from

coarse command signals. If you set switch 6 to the ON position, this feature is automati-

cally employed to provide the smoothest possible motion from a less than ideal signal

source.

Because a command lter is used as part of the step smoothing process, there will be a

slight delay, or “lag” in the motion. e graph below shows an example of the delay that can occur from using

the step smoothing lter.

Step 5: Step Pulse Type

Most indexers and motion controllers provide motion commands in the “Step and Direction” format. e Step

signal pulses once for each motor step and the direction signal commands direction. However, a few PLCs use

a dierent type of command signal: one signal pulses once for each desired step in the clockwise direction

(called STEP CW), while a second signal pulses for counterclockwise motion (STEP CCW). e STM23R can

accept this type of signal if you adjust switch 8 as shown in the digram. In STEP CW/STEP CCW mode, the CW

signal should be connected to the STEP input and the CCW signal to the DIR input.

OFF

SMOOTHING

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Applied-motion STM23R-2ND Manual de usuario Pagina 21