11

6

STM23-2 Torque Curves

80

100

120

140

STM23-2

12 VDC

24 VDC

48 VDC

70 VDC

0

20

40

60

0

10

20

30

40

50

rps

150

200

250

STM23-3

12 VDC

24 VDC

48 VDC

70 VDC

0

50

100

0

10

20

30

40

50

rps

Dynamic Current Control

At start-up the drive measures motor parameters, including the resistance and inductance, then uses this information to

optimize the system performance.

Command Signal Smoothing

Command Signal smoothing can soften the effect of immediate changes in

velocity and direction, making the motion of the motor less jerky. An added

advantage is that it can reduce the wear on mechanical components.

Delivers smoother system performance

Torque Ripple Smoothing

All step motors have an inherent low speed torque ripple that can affect the

motion of the motor. By analyzing this torque ripple the system can apply

a negative harmonic to negate this effect, which gives the motor much

smoother motion at low speed.

Delivers smoother motion at lower speeds

Microstep Emulation

With Microstep Emulation, low resolution systems can still provide smooth motion.

The drive can take low-resolution step pulses and create fine resolution micro-step

motion.

Delivers smoother motion in any application

1.8° Steps

Synthesized

Microsteps

Step motor systems have a natural tendency to resonate at certain speeds.

The STM drive+motor automatically calculates the system’s natural frequency

and applies damping to the control algorithm. This greatly improves midrange

stability, allows for higher speeds, greater torque utilization and also improves

settling times.

Anti-Resonance/Electronic Damping

Delivers better motor performance and higher speeds

Self Test & Auto Setup

System runs cooler

Allows for three current settings to help the motor run cooler and reduce

power consumption.

▪

Running Current - the current the drive will deliver for continuous

motion.

▪

Accel Current - the current the drive will deliver when accelerating or

decelerating.

▪

Idle Current - reduces current draw when motor is stationary.

I/O Connections

3 digital inputs

1 digital output

1 analog input

3 digital inputs

1 digital output

C

IP

C

IP

C

R IP

C

R

3 digital inputs

1 digital output

C

IP

C

IP

C

R IP

C

R

STEP+

STEP-

DIR+

DIR-

EN+

EN-

OUT+

OUT-

+5V

AIN

GND

6

5

4

3

3

2

IN1+

IN1-

IN2+

IN2-

IN3+

IN3-

OUT+

OUT-

- +

STEP+

STEP-

DIR+

DIR-

EN+

EN-

OUT+

OUT-

V+

V-

C

IP

C

IP

C

R IP

C

R

3 digital inputs

1 digital output

1 analog input

3 digital inputs

1 digital output

1 analog input

C

IP

C

IP

C

R IP

C

R

C

IP

C

IP

C

R IP

C

R