NEMA 17 Non-Captive Linear Stepper Motor
Electrical Specification
The HL421 is a non-captive linear stepper motor which integrates the nut and the rotor of the motor into one. The lead screw shaft passes through the center of the rotor. Fixing the lead screw and doing anti-rotation, when the rotor rotates, the motor will move along the screw in a straight line. Fixing the motor and lead screw has an anti-rotation solution, the lead screw will move in a straight line.
For NEMA 17 linear actuator, we can also provide captive stepper motor. If you want to larger size products, we can supply NEMA 23 non-captive stepper motor.
| Motor Electrical Specification | |||||||||
| Series Model | Step Angle ( o ) | L (mm) | Rated Current (A) | Phase Resistance (Ω) | Phase Inductance (mH) | Holding Torque (N.cm) | Detent Torque (N.cm) | Lead Wire (NO.) | Motor Weight ( g) |
| HL421-02813 | 1.8 | 34 | 1.3 | 2.4 | 2.8 | 28 | 1.6 | 4 | 220 |
| HL421-02817 | 1.8 | 34 | 1.7 | 1.2 | 1.8 | 28 | 1.6 | 4 | 220 |
| HL421-02804 | 1.8 | 34 | 0.4 | 30 | 35 | 28 | 1.6 | 4 | 220 |
| Screw Specification | ||
| Screw Dia.(mm) | Travel Per Step(mm) | Lead(mm) |
| Tr6.35 | 0.0079 | 1.58 |
| 0.0158 | 3.17 | |
| 0.0315 | 6.35 | |
Mechanical Dimensions
The Advantage of Non-captive Stepper Motor
1. Allow larger installation errors
In general, if using an external driven linear stepper motor, if the parallelism of the screw and guide rail installation is not good, the system will jam. However, using through type(non-captive) linear stepper motor, this problem will be improved. Due to the characteristic of structure, it can allow larger systematic errors.
2. No limited by the speed of the lead screw
When an external linear stepper motor is used for high-speed linear motion, it is usually restricted by the speed of the screw. However, using a non-captive stepper motor, because the screw is stationary, so it will not be restricted by the speed of the screw.
3. Save installation space
Due to the structure that the nut is built into the motor, the external stepper motor will not take up extra space.
| Mechanical Dimensions |
| Standard Leadwire Configuration |
Custom Option
Custom Shaft
Screw Shaft length
External Nut
Nut Material：Plastic, Copper, Steel, POM
Connector
Molex, Harwin, Tyco/AMP, JST etc.
Special length, Protective hose
Download
HL421.pdf
Ability
Ability:
Different from other NEMA 17 Linear Stepper Actuator that I.CH manufactures, this motor series is non-captive. So the longer stroke can provide. Also, this motor has a lower moment of inertia, higher start and stop frequencies.
Advantage:
1, Different options are available.
2, High endurance.
3, Low resistance.
Service:
1, One year warranty.
2, Install instruction.
FAQ:
1, I can't find suitable motors for my applications, what should I do?
In different applications, the parameters required are different. We can custom according to the parameters that you require.
2, How is the thrust performance of this actuator?
You can learn this non-captive stepper actuator’s performance from our PDF.
3, For this non-captive linear stepper actuator, what is the application?
Applications are printers, copiers, switching systems, etc.