MID-7654/7652Servo Power Motor Drive User Guide 18 ni.com
Dependingon your motor, you may need to reverse the connections shown
in Figure 7, as there is no industry standard for direction of movement
relativeto the positive and negative motor inputs. Table 8 shows the
National Instruments motion control standard directional polarity.
Figure 8 showsclockwise and counter-clockwise motor rota tion.
Figure8. Clockwiseand Counter-Clockwise Motor Rotation
Table8. NationalInstruments Standard Directional Polarity
Commanded
Direction Description
Motor Signal
Relationship
Command
Signal
Forward Clockwise (CW) facing
motor shaft
Motor –isgreater than
Motor +
Positivevoltage
Reverse Counter-clockwise(CCW)
facingmotor s haft
Motor + is greater than
Motor –
Negativevoltage
CCW CW