nema 23 can work in harsh environments and inherent problems in outer space motion control. The stepper motor is assembled according to AS9100 standard, tracing the origin of each component, and strictly controlling the manufacture to the final product.
Most of the components on nema 23 are metal alloys, which are not painted and can be used in vacuum. Plastic materials should be non exhaust polyamide or nylon. Sealed bearings filled with low exhaust lubricants are also acceptable. The stepper motor winding is optimized to minimize the resonant frequency at a specific operating speed. The use of components with high concentricity and dimensional accuracy helps to ensure that the rotor or shaft does not bring unnecessary vibration to the system. In space, vibration must be avoided because they affect sensors and instruments on board ships; low-level oscillations affect the quality of measurement sensors and imaging equipment. Because spacecraft or satellites have no energy to transfer in space, restraining vibration is a challenge. Each nema 23 designed for space requires the integrity of the material structure to deal with the expected forces without changing dimensional accuracy or mechanical integrity. Launching spacecraft into orbit is very violent, because the components are exposed to high amplitude vibration, low amplitude vibration and multi-direction impact. In addition, nema 23 vibrates during normal operation.