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Input / Output 4-5MN1921
4.3 Stepper outputs
The NextMove ST provides three 37VDC (max), 2A stepper axes drive outputs, operating at
10Hz to 200kHz. Logic level outputs are provided to control a fourth stepper axis.
If required, the output current for individual axes can be derated. This can only be achieved by
making precise alterations to the NextMove ST circuitry. Please contact Baldor Technical
Support for details.
4.3.1 Stepper axes 0-2 drive outputs
D2 C2 B2
A2
ST
L298
Driver
ST
L297
Controller
Step
Direction
Motor
outputs
Shield
AXIS 2
5
4
3
2
1
Figure 4 - Stepper output - axis 2 shown
The stepper axis drive outputs operate in half stepping mode.
4.3.1.1 Connecting a 4-wire motor
Four-wire bipolar motors can be used with the NextMove ST. Connections are shown in
Figure 5. If the motor turns in the wrong direction, reverse the connections from one of the
phase outputs AB or CD, but not both.
Phase 1
Phase 2
Motor
NextMoveST
axis output
Shield
Dx Cx Bx
Ax
Figure 5 - Connecting a 4-wire motor