Step into the operation of the system accuracy problem

If we talk about sports an accuracy of a system, you will find many factors have influence on the. In view of the system accuracy, the engineer must know how to rotary joints give into motor, drive or controller coordination to get the ideal operation precision.
A common error is an accuracy of a system error all boil down to motor problems. From the point of view of the stepping motor, it need to meet some tolerance standard, including mechanical tolerance and electrical tolerance. Phase winding inductance of disequilibrium is the important factors, some other causes include pole shoe and rotor misalignment, fixed rotor air gap between the heterogeneous, stator tooth relationship, and torque ripple, etc. To attain and continue to control these parameters is not very difficult.
High precision first from the stepping motor design, Lin Enigneering company's high precision 5709 type stepping motor whole at every step pitch Angle is 0.9 degrees, base number is NEMA23 (2.3 inches) matching RMS specially designed for the special smooth motion control design of high precision drive R325, constitute perfect stepping motor system, avoid the current waveform distortion.
We know, the motor stator winding inductance is proportional to the square of the number of turns of winding, as long as the appropriate winding process can guarantee the consistency between phase inductance. A lot of stepping motor manufacturers have been used to be automatic winding equipment to ensure the consistency. Of course, rotor magnetic material also should have good consistency so as to
rotary union ensure each phase inductance motor consistent. Some other specification index, and mechanical relevant. As long as manufacturers use reliable and high quality parts and excellent process control to guarantee fixed rotor uniform grinding quantity, you can obtain satisfactory accuracy. As Lin Engineering company Belal Azim said, due to ensure the two phase bipolar stepper motor phase inductance between the error in the plus or minus 5% less than, so 0.9 degrees stepping motor in the use of 64 microstep driving mode, positioning error can reach 1.5 mm arc points, including precision and accuracy. Meet the above conditions, stepper motor can fully meet the index requirements.
The rest of the task is to
fiber optic rotary joint make the drive/controller tell stepping motor should exercise where and how to exercise, and not due to drive their accuracy is not high and reduce the accuracy of the motor. A subdivision driver motor winding through to provide specific excitation current, tell motor need to run many micro step. Stepping motor operation in the whole step mode, the highest accuracy, because just and motor mechanical design features coincide. The stator tooth just completely aligned, and the winding through the current maximum. With the fine fraction increases, step moment Angle decreases, right now it is increasingly difficult to guarantee the accurate positioning.