Stepper motors are known for their accurate positioning capabilities and high torque delivery at low speeds, but they require careful sizing to ensure the motor matches the load and application parameters, to minimize the possibility of lost steps or motor stalling. Adding a gearbox to a stepper motor system can improve the motor’s performance by decreasing the load-to-motor inertia ratio, increasing torque to the load, and reducing motor oscillations.
One cause of missed steps in stepper motor applications is inertia. The ratio of the load inertia to the motor inertia determines how well the motor can drive, or control, the load — especially during acceleration and deceleration portions of the move profile. If the load inertia is significantly higher than the motor inertia, the motor will have a difficult time controlling the load, and overshoot (advancing more steps than commanded) or undershoot (missing steps) can occur. A very high load-to-motor inertia ratio can also cause the motor to draw excessive current and stall.
One way to reduce the inertia ratio is to use a larger motor with higher inertia. But that means higher cost, more weight, and trickle-down effects on other parts of the system such as couplings, cables, and drive components. Instead, adding a gearbox to the system reduces the load-to-motor inertia ratio by the square of the gear ratio.
Gearbox Ratio: 5, 7.5, 10, 15, 20, 25, 30, 40, 50, 60, 80, 100
Nema34 Geared stepper motors 1800OZ.IN Specification:
| Model No. | Step Angle | Motor Length | Current /Phase | Resistance /Phase | Inductance /Phase | Holding Torque | # of Leads | Detent Torque | Rotor Inertia |
| | ( °) | (L)mm | A | Ω | mH | N.m | No. | Kg.cm | g.cm |
| JK86HS155-6204 | 1.8 | 155 | 6.2 | 0.75 | 9 | 12.2 | 4 | 3.6 | 4000 |
| JK86HS155-4208 | 1.8 | 155 | 4.2 | 1.25 | 8 | 12.2 | 8 | 3.6 | 4000 |
Small stepper motor high torque Wiring Diagram:
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- We offer one year warranty.
- Within the warranty period, if your item has any problems when you use it, please send us an e-mail with photos or video to show the problem.
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Applications
Computer controlled stepper motors are a type of motion-control positioning system. They are typically digitally controlled as part of an open loop system for use in holding or positioning applications.
In the field of lasers and optics they are frequently used in precision positioning equipment such as linear actuators, linear stages, rotation stages, goniometers, and mirror mounts. Other uses are in packaging machinery, and positioning of valve pilot stages for fluid control systems.
Commercially, stepper motors are used in floppy disk drives, flatbed scanners, computer printers, plotters, slot machines, image scanners, compact disc drives, intelligent lighting, camera lenses, CNC machines and, more recently, in 3D printers.
