A non-captive linear stepper motor is an electric motor that transforms electrical pulses into linear motion in discrete steps. Unlike captive linear stepper motors, which feature a fixed nut or mechanical component that prevents any movement of the nut off the lead screw, non-captive linear stepper motors utilize a floating nut. This design allows the nut to move freely along the lead screw as the motor operates.
In a non-captive system, the nut is not secured within a housing, allowing it to slide along the screw shaft while the motor spins. This flexibility facilitates various motion configurations and provides the ability to accommodate different load setups, enhancing the motor's versatility.
Jkongmotor offers a selection of lead screw options, which include:
Additionally, Jkongmotor provides linear motors available in Nema sizes 8, 11, 14, 17, 23, 24, and 34.
| Model | Step Angle | Phase | Shaft Type | Wires | Body Length | Current | Resistance | Inductance | Holding Torque | Leads No. | Rotor Inertia | Weight |
| (°) | / | / | / | (L)mm | A | Ω | mH | mN.m | No. | g.cm2 | Kg | |
| JK20HSC30-0604 | 1.8 | 2 | Through Screw | Connector | 30 | 0.6 | 6.5 | 1.7 | 18 | 4 | 2 | 0.05 |
| JK20HSC38-0604 | 1.8 | 2 | Through Screw | Connector | 38 | 0.6 | 9 | 3 | 22 | 4 | 3 | 0.08 |
| Model | Step Angle | Phase | Shaft Type | Wires | Body Length | Current | Resistance | Inductance | Holding Torque | Leads No. | Rotor Inertia | Weight |
| (°) | / | / | / | (L)mm | A | Ω | mH | g.cm | No. | g.cm2 | Kg | |
| JK28HSC32-0674 | 1.8 | 2 | Through Screw | Direct Wire | 32 | 0.67 | 5.6 | 3.4 | 600 | 4 | 9 | 0.11 |
| JK28HSC45-0674 | 1.8 | 2 | Through Screw | Direct Wire | 45 | 0.67 | 6.8 | 4.9 | 950 | 4 | 12 | 0.14 |
| JK28HSC51-0674 | 1.8 | 2 | Through Screw | Direct Wire | 51 | 0.67 | 9.2 | 7.2 | 1200 | 4 | 18 | 0.2 |
| Model | Step Angle | Phase | Shaft Type | Wires | Body Length | Current | Resistance | Inductance | Holding Torque | Leads No. | Rotor Inertia | Weight |
| (°) | / | / | / | (L)mm | A | Ω | mH | g.cm | No. | g.cm2 | Kg | |
| JK35HSC28-0504 | 1.8 | 2 | Through Screw | Direct Wire | 28 | 0.5 | 20 | 14 | 1000 | 4 | 11 | 0.13 |
| JK35HSC34-1004 | 1.8 | 2 | Through Screw | Direct Wire | 34 | 1 | 2.7 | 4.3 | 1400 | 4 | 13 | 0.17 |
| JK35HSC42-1004 | 1.8 | 2 | Through Screw | Direct Wire | 42 | 1 | 3.8 | 3.5 | 2000 | 4 | 23 | 0.22 |
| Model | Step Angle | Phase | Shaft Type | Wires | Body Length | Current | Resistance | Inductance | Holding Torque | Leads No. | Rotor Inertia | Weight |
| (°) | / | / | / | (L)mm | A | Ω | mH | kg.cm | No. | g.cm2 | Kg | |
| JK42HSC34-1334 | 1.8 | 2 | Through Screw | Direct Wire | 34 | 1.33 | 2.1 | 2.5 | 2.6 | 4 | 34 | 0.22 |
| JK42HSC40-1704 | 1.8 | 2 | Through Screw | Direct Wire | 40 | 1.7 | 1.5 | 2.3 | 4.2 | 4 | 54 | 0.28 |
| JK42HSC48-1684 | 1.8 | 2 | Through Screw | Direct Wire | 48 | 1.68 | 1.65 | 2.8 | 5.5 | 4 | 68 | 0.35 |
| JK42HSC60-1704 | 1.8 | 2 | Through Screw | Direct Wire | 60 | 1.7 | 3 | 6.2 | 7.3 | 4 | 102 | 0.55 |
| Model | Step Angle | Phase | Shaft Type | Wires | Body Length | Current | Resistance | Inductance | Holding Torque | Leads No. | Rotor Inertia | Weight |
| (°) | / | / | / | (L)mm | A | Ω | mH | N.m | No. | g.cm2 | Kg | |
| JK57HSC41-2804 | 1.8 | 2 | Through Screw | Direct Wire | 41 | 2.8 | 0.7 | 1.4 | 0.55 | 4 | 150 | 0.47 |
| JK57HSC51-2804 | 1.8 | 2 | Through Screw | Direct Wire | 51 | 2.8 | 0.83 | 2.2 | 1.0 | 4 | 230 | 0.59 |
| JK57HSC56-2804 | 1.8 | 2 | Through Screw | Direct Wire | 56 | 2.8 | 0.9 | 3.0 | 1.2 | 4 | 280 | 0.68 |
| JK57HSC76-2804 | 1.8 | 2 | Through Screw | Direct Wire | 76 | 2.8 | 1.1 | 3.6 | 1.89 | 4 | 440 | 1.1 |
| JK57HSC82-3004 | 1.8 | 2 | Through Screw | Direct Wire | 82 | 3.0 | 1.2 | 4.0 | 2.1 | 4 | 600 | 1.2 |
| JK57HSC100-3004 | 1.8 | 2 | Through Screw | Direct Wire | 100 | 3.0 | 0.75 | 3.0 | 2.8 | 4 | 700 | 1.3 |
| JK57HSC112-3004 | 1.8 | 2 | Through Screw | Direct Wire | 112 | 3.0 | 1.6 | 7.5 | 3.0 | 4 | 800 | 1.4 |
The operation of a non-captive linear stepper motor is similar to other stepper motors, but with distinct features:
The motor receives electrical pulses from a controller, sequentially energizing its coils. This generates a magnetic field that attracts or repels the rotor, causing it to rotate in small increments (typically between 0.9° and 1.8° per step, depending on the motor type).
The motor's rotational motion is transferred to a lead screw, a threaded shaft that engages with the nut. In a non-captive linear stepper motor, the nut is free to move along the lead screw without being fixed in place.
As the motor turns, the nut shifts incrementally along the lead screw, creating linear motion. The amount of linear displacement corresponds to the number of steps the motor takes, with each step contributing to the total distance traveled by the nut.
In a non-captive setup, the nut can move freely along the lead screw, allowing it to cover longer distances unimpeded. This provides smoother movement and enhances flexibility in various applications.
Selecting a non-captive linear stepper motor presents several advantages, particularly for applications that require precision, flexibility, and cost-effectiveness. The ability to allow the nut to move freely along the lead screw enables longer travel distances, smoother motion, and reduced friction. The straightforward design also makes it a more affordable and reliable choice compared to captive systems. Additionally, non-captive motors typically exhibit reduced backlash and high efficiency, making them ideal for industries that prioritize accurate movement.
A non-captive linear stepper motor comes with several advantages, which make it suitable for various applications:
Non-captive linear stepper motors are highly suitable for a wide range of applications, particularly where precise and dependable linear motion is essential. Key applications include:
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