Omega STM Specification

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Stepper DriveS

integrateD Stepper DriveS/MotorS With aDvanceD FeatureS anD control optionS

STM Series

l Current Output 0.5 to 5.0 A l Conﬁgurator

Conﬁguration

Software

l Conﬁgurable Idle Current

Conﬁguration

Reduction

l External Control Options l Pulse and Direction l Analog Command Signal l Host Command via RS232/485 l Fault Protection:

l Over-Voltage, Under-Voltage

l Over-Temp l External Output Shorts l Internal Ampliﬁer Shorts l Open Motor Phases l Multi-Axis System with

SINet

Hub

l Microstepping Up to 51200

Steps/Revolution

The STM is a drive + motor + control unit, fusing step motor, drive, and controller technologies into a single device, offering savings on space, wiring and cost over conventional motor and drive solutions. The “S” models offer control options such as step and direction, analog input, joystick control, and host commands using the Si Command Language (SCL). The “Q” models add the capability of standalone programmable operation using the “Q” text-based programming language. This language offers high-level features such as multi-tasking, conditional programming, math functions, register access, and much more. Both of the STM models offer RS232 and RS485 versions, as well as the option of a 1000-line encoder that is integrated into the motor housing. The encoder option provides stall detection and prevention; the controller senses rotor lag and reduces speed to avoid stalling. In addition, all models offer two different motor sizes: a 2-stack version that provides 125 oz-in of holding torque, and a 3-stack version with 210 oz-in of torque.

Software Included!

ADVANCED FEATURES

Auto Set-Up:

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

Self-Test:

At power-up the drive diagnoses mis-wires and detects any open or shorted motor phases.

Torque Ripple Smoothing:

The drive smoothes the low-speed torque ripple which is inherent in all step motor systems.

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.

Anti-Resonance/ Electronic Damping:

Step motor systems resonate at certain speeds. The STM drive + motor automatically calculates the system’s natural frequency and applies damping to the control algorithm.

SPECIFICATIONS

POWER AMPLIFIER (ALL MODELS) Ampliﬁer Type: Dual H-Bridge,

4 Quadrant

Current Control: 4 state PWM at 20 Khz Output Torque: STM23x-2 Series: To 125 oz-in with

suitable power supply STM23x-3 Series: To 210 oz-in with

suitable power supply

STM23S-3RN shown smaller than actual size.

Power Supply: External 12 to 70 Vdc power supply required

Input Voltage Range: 12 to 70 Vdc Protection: Over-voltage, under-

voltage, over-temp, motor/wiring shorts (phase-to-phase, phase-to-ground)

Idle Current Reduction: Reduction range of 0 to 90% of running current after delay selectable in milliseconds

Ambient Temperature: 0 to 40°C (32 to 104°F) (mounted to suitable heatsink)

Humidity: 90% non-condensing CONTROLLER (ALL MODELS)

Microstep Resolution: Software

selectable from 200 to 51200 steps/rev in increments of 2 steps/rev

Anti-Resonance (Electronic Damping): Raises the system damping ratio to eliminate midrange instability and allow stable operation throughout the speed range and improves settling time

Torque Ripple Smoothing: Allows for ﬁne adjustment of phase current waveform harmonic content to reduce low-speed torque ripple in the range

0.25 to 1.5 rps Auto Set-Up: Measures motor

parameters and conﬁgures motor current control and anti-resonance gain settings

Self Test: Checks internal and external power supply voltages; diagnoses open motor phases and motor resistance changes >40%; detects encoder wiring and signal faults (differential encoder only)

Microstep Emulation: Performs high resolution stepping by synthesizing ﬁne microsteps from coarse steps (step and direction mode only)

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Command Signal Smoothing: Software conﬁgurable ﬁltering reduces jerk and excitation of extraneous system resonances (step and direction mode only)

CONTROLLER (“S” MODELS) Non-Volatile Storage:

Conﬁgurations are saved in FLASH memory on-board the DSP

Mode of Operation: Step and direction, CW/CCW, A/B quadrature, oscillator, joystick, SCL, hub

Step and Direction Inputs: STEP ±: Optically Isolated, 5 to 24V;

minimum pulse width = 250 ns; maximum pulse frequency = 3 MHz; function: Step, CW Step, A quadrature, encoder following, CW limit, CW jog, start/stop (oscillator mode)

DIR ±: Optically isolated, 5 to 24V; minimum pulse width = 250 ns; maximum pulse frequency = 3 MHz; function: DIR, CCW step, B quadrature, encoder following, CCW limit, CCW jog, sensor, DIR (oscillator mode), adjustable bandwidth digital noise rejection ﬁlter on all inputs

Enable Input:

EN±: Optically isolated, 5 to 24V; minimum pulse width = 250 ns; maximum pulse frequency = 3 MHz; function: enable, reset, speed 1/ speed 2 (oscillator mode)

Output: Optically isolated, 24V, 40 mA max NPN/sinking; function: fault, motion, tach or general purpose programmable

Analog Input Range: 0 to 5 Vdc Analog Input Resolution: 12 bits Communication Interface:

RS232 or RS485

CONTROLLER (“Q” MODELS) Non-Volatile Storage: Programs, data

and drive conﬁguration are saved in FLASH and EEPROM memory

Inputs: STEP ±: Optically isolated, 5 to 24V;

minimum pulse width = 250 ns; maximum pulse frequency = 3 MHz; function: step, CW step, A quadrature, encoder following, CW limit, CW jog, start/stop (oscillator mode), general purpose input

EN ±: Optically isolated, 5 to 24V; minimum pulse width = 250 ns; maximum pulse frequency = 3 MHz; function: enable, reset, speed 1/ speed 2 (oscillator mode), general purpose input

Adjustable bandwidth digital noise rejection ﬁlter on all inputs

Output: Optically isolated, 24V, 40 mA max NPN/sinking

Function: Fault, motion, tach or general purpose programmable

Analog Input Range: 0 to 5 Vdc

torque-SpeeD curveS

STM17x-3

Drive settings: 1.8 A/phase, 20000 steps/rev

oz-in

140

120

100

oz-in

250

200

150

oz-in

100

STM23-2

STM23-3

Analog Input Resolution: 12 bits Communication Interface:

RS232 or RS485

PHYSICAL (ALL MODELS) Mass:

STM23X-2XX = 1 lb 14 oz STM23X-3XX = 2 lb 10 oz

Rotor Inertia:

STM23X-2XX = 0.0037 oz-in2 STM23X-2XX = 0.0065 oz-in2

Operating Temp Range: -20 to 50°C (-4 to 122°F)

12 V 24 V

12 VDC 24 VDC

rps

48 VDC

48 V

70 VDC

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drive #1

drive #2

drive #3

drive #4

Host

PLC

Optical

Isolation

Optical

Isolation

OUT1 OUT2 OUT3 OUT4

IN1 IN2 IN3 IN4

Model Length (L) in mm

±1

(0.8)

56.4 (2.2) max

(3.2)

75 (3)

STM17x-3

55.8 (2.1)

42.4 (1.6)

(0.6)

5.85 (0.23) flat

1.6 (0.06)

4.8 (0.19)

28.8 (1.13)

81±1

47.14 (1.85)

ø 38.1

(1.5)

ø 6.35 (0.25)

50.9 (2)

47.14 (1.85)

4 x ø 5 (0.2)

STM23X-2: Length “L” = 92.4 mm (3.63") STM23X-3: Length “L” = 114.4 mm (4.5")

24 (0.94)

(0.78)

(0.6)

ø 22

(0.86)

ø 5

(0.2)

4.50 Flat (0.17)

56.4 (2.2) max

42.3 (1.66) MAX

(1.22)

43.5 (1.7)

4-M3Depth 4.5 (0.17)

(1.22)

42.3 (1.66) MAX

ø = diameter

Dimensions: mm (inch)

Mass = 441 g (15.6 oz) Rotor Inertia = 82 g-cm2 (0.45 oz-in2)

acceSSorieS

Order

HUB 444

Separately.

Available from

OMEGA.

Multi-Axis Systems

Connect up to 4 drives on a mult-axis system using SiNet Hub Programmer your sequence of events, then download to the hub for a stand-alone system or send serial commands to the drives from a PC, PLC, HMI, or other host controller.

Hub 444. Use SiNet

software to develop

HUB 444 shown smaller than actual size.

HUB 444

for Multi-Axis

Systems

HUB 444 DIN RAIL with DIN rail mounting kit shown smaller than actual size.

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ST5-Q

OMRC-050 shown smaller than actual size.

RC050 Regen Clamp— For Stepper Drive Power Supply Protection

l Voltage Range

24 to 80 Vdc

l 50 W Power Dissipation l Regen Present LED l Power LED l 76 x 102 x 6.4 mm (3 x 4 x 2.5")

SPECIFICATIONS

Input Power Cont: 50 W Input Power Peak: 800 W Voltage Range: 24 to 80 Vdc

Order

OMRC-050

Separately.

Available from

OMEGA.

when using NEMA

deceleration rate is

OMPS150A24 shown smaller than actual size.

Recommended

23 motors @

speeds >1- rps

> 100 rev/sec

Order Power

Supplies

Separately.

SoFtWare St conFigurator

l Simple Drive Set-Up

Software

Included

Free with Purchase of STM Drives!

l Store and Download

Conﬁgurations

To Order

MODEL NO. DESCRIPTION “S” MODELS

STM17S-3AN Integrated stepper drive/motor, 85 oz-in max torque, RS232 STM17S-3RN Integrated stepper drive/motor, 85 oz-in max torque, RS485 STM17S-3AE Integrated stepper drive/motor, 85 oz-in max torque, RS232, endcoder STM17S-3RE Integrated stepper drive/motor, 85 oz-in max torque, RS485, endcoder STM23S-2AN Integrated stepper drive/motor, 125 oz-in max torque, RS232 STM23S-2RN Integrated stepper drive/motor, 125 oz-in max torque, RS485 STM23S-2AE Integrated stepper drive/motor, 125 oz-in max torque, RS232, encoder STM23S-2RE Integrated stepper drive/motor, 125 oz-in max torque, RS485, encoder STM23S-3AN Integrated stepper drive/motor, 210 oz-in max torque, RS232 STM23S-3RN Integrated stepper drive/motor, 210 oz-in max torque, RS485

STM23S-3AE Integrated stepper drive/motor, 210 oz-in max torque, RS232, encoder STM23S-3RE Integrated stepper drive/motor, 210 oz-in max torque, RS485, encoder

“Q” MODELS STM23Q-2AN Integrated stepper drive/motor, 125 oz-in max torque, RS232 STM23Q-2RN Integrated stepper drive/motor, 125 oz-in max torque, RS485 STM23Q-2AE Integrated stepper drive/motor, 125 oz-in max torque, RS232, encoder STM23Q-2RE Integrated stepper drive/motor, 125 oz-in max torque, RS485, encoder STM23Q-3AN Integrated stepper drive/motor, 210 oz-in max torque, RS232 STM23Q-3RN Integrated stepper drive/motor, 210 oz-in max torque, RS485 STM23Q-3AE Integrated stepper drive/motor, 210 oz-in max torque, RS232, encoder

STM23Q-3RE Integrated stepper drive/motor, 210 oz-in max torque, RS485, encoder

ACCESSORIES

OMPS150A24 Power supply for STM drive, 24 Vdc, 6.3 A OMPS300A48 Power supply for STM drive, 48 Vdc, 6.7 A HUB 444 DIN RAIL Multi-axis motion serial hub with DIN-rail mounting kit OMRC-050 Motor regeneration clamp

Comes complete with software and download cable. Note: Power supply is required (sold separately). Ordering Examples: STM23S-2AE, integrated stepper drive/motor with 125 oz-in holding torque and RS232 interface plus 1000-line encoder

and OMPS150A24, 24 Vdc power supply. STM23S-2RN, integrated stepper drive/motor with 125 oz-in holding torque and RS485 interface and OMPS150A24, 24 Vdc power supply.

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