Sinusoidal Commutation

Brushless servo motors require sinusoidal commutation. Although many

advanced motor drives have built-in commutation capability, many lower-

cost drives require the motion controller to provide commutation. With

sinusoidal commutation, offered by the NI 7350, you can obtain the

smoothest possible motion with a brushless servo motor and a lower

cost drive.

Note that when using the sinusoidal commutation feature, use two

axis resources for each drive you connect to. This is because two analog

outputs are needed to provide the commutation.

Increasing Integration Speed with New

Breakpoint and High-Speed Capture

Enhancements

NI 7350 series motion controllers offer buffered breakpoints for precise

timing between motion and measurements or vision. Using this feature,

you can send a buffer of position breakpoints to the controller that

trigger a digital signal upon reaching the positions in the buffer. Buffered

breakpoints can trigger at rates as high as 2 kHz. For equally spaced

positions, you can use periodic breakpoints to achieve even higher

speeds of up to 4 MHz. With periodic breakpoints, you supply a position

modulus. Each time the position reaches that modulus position, the

breakpoint triggers. Another new feature that enhances integration

speed is the new buffered high-speed position capture for NI 735x

controllers. This feature captures positions based on a trigger from an

external source or from a data acquisition or machine vision device. The

high-speed capture can capture positions at rates of up to 2 kHz per axis.

Additional Features

For the NI 735x controllers, your PID update rate can be 62.5 µs for up to

two axes. This means that for multiaxis applications, the PID rates can

be twice as fast as those for previous boards. An NI 735x also has

increased resolution for analog-to-digital conversion, giving you high

resolution for analog position feedback.

High-Performance Stepper/Servo Motion Controllers

2

BUY ONLINE at ni.com or CALL 800 813 3693 (U.S.)

Feature

NI 735x

Number of Axes

2, 4, 6, 8

PAC Platforms

PCI, CompactPCI/PXI

Linear, Circular, Spherical, and Helical Interpolation; Blending



Trapezoidal, S-Curve Profiles



Closed-Loop Stepper Control



Contouring, Electronic Gearing, Onboard Programming



Sinusoidal Commutation for Brushless Servo Motors



Buffered Breakpoints, Buffered High-Speed Capture, 4 MHz

Periodic Breakpoints



Number of Axes per 62.5 µs PID Rate

2

PWM Lines/DIO Lines/Analog Input Resolution

2/64/16-bit

Maximum Step Output Rate/Encoder Input Rate

8 MHz/20 MHz

Programming API

NI-Motion Driver

Software

NI Motion Assistant,

NI LabVIEW, C, Visual Basic

Analog Reference (Output)

Analog Input 3

Analog Input 1

Analog Output Ground

Analog Output 3

Analog Output 1

Digital Ground

Breakpoint 3

Breakpoint 1

Digital Ground

Axis 4 Inhibit

Trigger 4

Axis 4 Home Switch

Digital Ground

Digital Ground

Axis 4 Dir (CCW)

Axis 3 Inhibit

Trigger 3

Axis 3 Home Switch

Digital Ground

Digital Ground

Axis 3 Dir (CCW)

Axis 2 Inhibit

Trigger 2

Axis 2 Home Switch

Digital Ground

Digital Ground

Axis 2 Dir (CCW)

Axis 1 Inhibit

Trigger 1

Axis 1 Home Switch

Digital Ground

Digital Ground

Axis 1 Dir (CCW)

Analog Input Ground

Analog Input 2

Reserved

Analog Output 2

Shutdown

Breakpoint 4

Breakpoint 2

Analog Input 4

Analog Output 4

Host +5 V

Axis 4 Reverse Limit Switch

Axis 4 Forward Limit Switch

Axis 4 Encoder Index

Axis 4 Encoder Phase B

Axis 4 Encoder Phase A

Axis 4 Step (CW)

Axis 3 Reverse Limit Switch

Axis 3 Forward Limit Switch

Axis 3 Encoder Index

Axis 3 Encoder Phase B

Axis 3 Encoder Phase A

Axis 3 Step (CW)

Axis 2 Reverse Limit Switch

Axis 2 Forward Limit Switch

Axis 2 Encoder Index

Axis 2 Encoder Phase B

Axis 2 Encoder Phase A

Axis 2 Step (CW)

Axis 1 Reverse Limit Switch

Axis 1 Forward Limit Switch

Axis 1 Encoder Index

Axis 1 Encoder Phase B

Axis 1 Encoder Phase A

Axis 1 Step (CW)

135

2

36

3

37

438

539

640

741

842

943

10 44

11 45

12 46

13 47

14 48

15 49

16 50

17 51

18 52

19 53

20 54

21 55

22 56

23 57

24 58

25 59

26 60

27 61

28 62

29 63

30 64

31 65

32 66

33 67

34 68

135

236

337

438

539

640

741

842

943

10

44

11

45

12

46

13

47

14

48

15

49

16

50

17

51

18

52

19

53

20

54

21

55

22

56

23

57

24

58

25

59

26

60

27

61

28

62

29

63

30

64

31

65

32

66

33

67

34

68

Analog Reference (Output)

Analog Input 7

Analog Input 5

Analog Output Ground

Analog Output 7

Analog Output 5

Digital Ground

Breakpoint 7

Breakpoint 5

Digital Ground

Axis 8 Inhibit

Trigger 8

Axis 8 Home Switch

Digital Ground

Digital Ground

Axis 8 Dir (CCW)

Axis 7 Inhibit

Trigger 7

Axis 7 Home Switch

Digital Ground

Digital Ground

Axis 7 Dir (CCW)

Axis 6 Inhibit

Trigger 6

Axis 6 Home Switch

Digital Ground

Digital Ground

Axis 6 Dir (CCW)

Axis 5 Inhibit

Trigger 5

Axis 5 Home Switch

Digital Ground

Digital Ground

Axis 5 Dir (CCW)

Analog Input Ground

Analog Input 6

Reserved

Analog Output 6

Shutdown

Breakpoint 8

Breakpoint 6

Analog Input 8

Analog Output 8

Host +5 V

Axis 8 Reverse Limit Switch

Axis 8 Forward Limit Switch

Axis 8 Encoder Index

Axis 8 Encoder Phase B

Axis 8 Encoder Phase A

Axis 8 Step (CW)

Axis 7 Reverse Limit Switch

Axis 7 Forward Limit Switch

Axis 7 Encoder Index

Axis 7 Encoder Phase B

Axis 7 Encoder Phase A

Axis 7 Step (CW)

Axis 6 Reverse Limit Switch

Axis 6 Forward Limit Switch

Axis 6 Encoder Index

Axis 6 Encoder Phase B

Axis 6 Encoder Phase A

Axis 6 Step (CW)

Axis 5 Reverse Limit Switch

Axis 5 Forward Limit Switch

Axis 5 Encoder Index

Axis 5 Encoder Phase B

Axis 5 Encoder Phase A

Axis 5 Step (CW)

Motion I/O Connector for Axes 1-4

Motion I/O Connector for Axes 5-8

NI 7350 Motion I/O Connector Pinouts

(two 68-pin VHDCI connectors)