Specifications

SPECIFICATIONS
ADVANCED MICRO CONTROLS INC.
2
16
Stepper Motors
AMCI offers a total of 21 different stepper motor configurations. Three different NEMA sizes are available,
size 23, 34, and 42. The size 23 and 34 motors are available in one, two, and three stack configurations. All
motors have single and dual shaft configurations, and the dual shaft models can have an incremental optical
encoder factory installed. The part numbers are given below.
Outline drawings for all of the motors are available on our website, www.amci.com.
Additional information on our motors is available in Appendix A: CHOOSING YOUR MOTOR, starting on
page 45. This information includes guidelines for sizing your motor, torque curves for all AMCI motors, and
information on determining current settings for non-AMCI motors.
1) The Holding Torque specification assumes that the motor is attached to an SD17063 with the
windings in series, and the motor current is set to the maximum value for the motor. Using a different
drive may vary your holding torque significantly.
2) Specification is for dual shaft motors without factory encoders.
Table 2.5 Stepper Motor Specifications
Encoder Option
All AMCI dual shaft stepper motors can have an optical incremental encoder factory installed. A metal dust-
cover that covers the encoder and shaft is installed with the encoder. Motor outline drawings that include the
dimensions for the encoder are available on our website, www.amci.com. Table 2.6 lists the main specifica-
tions of the incremental encoder. A complete specification sheet is included with the motor when it ships
with the encoder option.
Table 2.6 Optical Encoder Specifications
Specification SM23-90 SM23-130 SM23-240 SM34-250 SM34-425 SM34-650 SM42-1250
NEMA Size 23 23 23 34 34 34 42
Max. Parallel Current 2.8A 2.8A 4.0A 4.3A 6.4A 7.7A 12.0A
Max. Series Current1.4A1.4A2.0A2.2A3.2A3.8A6.0A
Holding Torque
A
110 (oz-in) 160 (oz-in) 280 (oz-in) 210 (oz-in) 380 (oz-in) 496 (oz-in) 1125 (oz-in)
Motor Length w/o
shafts
1.8 in. 2.2 in. 3.1 in. 2.5 in 3.7 in. 5.1 in. 7.7 in.
Rotor Inertia
B
(oz-in-sec
2
)
2.0X10
-3
3.5X10
-3
6.1X10
-3
9.1X10
-3
17.0X10
-3
26.5X10
-3
114.0 X10
-3
Motor Weight
B
17 oz. 24 oz. 37 oz. 48 oz.
84 oz.
124 oz. 18.6 lbs.
For The Dual Shaft Option, Add “D” To The Given Part Number
For The Dual Shaft / Factory Encoder Options, Add “DE” To The Given Part Number
Specification Value
Resolution 1,000 lines
Output Drivers 5Vdc Differential
Input Power 135mA @ 5Vdc ± 5%
Moment of Inertia (oz-in-sec
2
) 17X10
-5
max.
Operating Temperature -10°C to +85°C