National Instruments nuDrive 2CF-001, Руководство пользователя

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nuDrive Accessory User Guide 8 www.ni.com
Figure 2. Typical Full-Coil Stepper Motor (2-Phase Type)
Terminal Block Pin Assignment
It is recommended you use shielded, 20 AWG wire or larger for the motor
power cable. If available, you should connect a case ground wire to pin 3
(Ground/Shield); this helps to avoid ground loops and signal noise
problems. (Case ground connects to the motor housing, and not to any of
the motor power terminals.)
The stepper nuDrives contain bipolar chopper drivers. The stepper motors
must be wired in a four-wire configuration as shown in Figure 2. Unused
lead wires must be isolated and not connected. See
Stepper Motor
Configurations for additional information on connecting
6- and 8-wire motors and on the alternate half-coil configuration.
Caution Never connect unused center taps or winding terminals to pin 3.
Encoder Terminal Blocks
For quadrature incremental encoder signals, each nuDrive axis has a
separate 8-position terminal block with removable screw terminals.
Where applicable, the nuDrive accepts two types of encoder signal
inputs: single-ended (TTL) or differential line driver. You can
accommodate open-collector output encoders by using 2.2 k
Ω
pullup
resistors to +5 VDC.
Figure 3 shows the typical encoder wiring pin assignment for single-ended
signal input. Figure 4 shows the typical encoder wiring pin assignment for
differential line driver signal inputs.
1
2
3
4
5
Winding A Start
Winding B Start
Winding B End
Winding A End
Motor Case Ground
Shield
Stepper Motor