nema stepper motor 34? What motor is used in CNC machine?

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nema stepper motor 34? What motor is used in CNC machine? 

All kinds. Depends on type, application, required tooling, footprint, costs, finish/tolerances, industry, MTBF/lifetime.

DC stepper motors prevail in small-footprint/benchtop soft material CNCs for axial positioning while AC motors with VFD are used for spindles. For the room-sized, million dollar shop floor CNCs, you will find a combination of high torque AC machines along with BLDCs for tool camera/tool changer/coolant flow positioning actuators. All industrial CNC motors use feedback - so the motors get categorized as servomotors. Many of the 12DOF and greater machines use additional motors for workpiece positioning - depending on capacity, those could use DC or AC. Almost no one (except hobby grade) uses DC steppers without any feedback. The next generation machines are likely to use elastic actuation/tool temperature feedback techniques to sense compliance in workpiece/tool fixturing or work in unprotected locations for completely automated controls (no need to muck around with feed/speed RPMs).

Almost all high-end CNCs implement advanced versions of vector control strategies (different types of FieldOrientedControls/DirectTorqueControls; for example Fanuc talks about a 'high response vector strategy' which is a FOC type) and system specific feedback/forward control strategies. This requires high resolution, high bandwidth and statistical feedback and some extremely advanced DSP capabilities. Such capabilities reduce dependence on the nature of motor used.

Cloudray Stepper Motor Series has set the standard for quality, reliability, and durability in stepping motors. The precision of our Torque Power motors is matched only by the dependability of their performance. All Torque Power motors are bi-directional and totally enclosed with permanently lubricated ball bearings for long-lasting, smooth operation.

High Torque, High Precision and Long life is Cloudray's core advantage
Low vibration,Low heating, No loss of step
Fast Response,Better Acceleration Performance
Thanks to a robust design they can be selected for the harshest environments. Precise, open-loop, speed and position control can be achieved with the application of full step, half step, or microstepping electronics.
Higher Resolution,Avoidance of Resonance Regions
Stepping angle is adjustable( rang in 18°±5%), 0.9 °stepper motor's stepping angle is smaller, fineness is higher and positioning is more accurate.Avoiding vibration,runs more smoothly and gets lower noise.
Sturdy structure, extremely long life
High quality materials including bearings and shaft made in Japan
Robust assembly, high speed range, and exceptional performance in even the harshest environments make Cloudray Stepper Motors the perfect solution for demanding positioning applications.
Short length and light weight allow them to be used in highly integrated systems
Cloudray stepper motor factory video
Stepper motor application
Cloudray stepper motor and Stepping Motor Driver are widely used in engraving machine, cutting plotter, textile machine, 3D printer, medical devices,stage lighting equipment, robot, CNC machine, music fountain and other industrial automatic equipment.

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