Bearing Grinder stepper motor and control system of a stepping motor and control system on the bearing grinder is from the beginning of the nineties, more than a decade, the use of stepper motor control technology development is bearing grinder fast, at present, Wuxi, Shijiazhuang, Chengdu and several cities in Henan bearing equipment factory production stepper motor control are bearing grinder. With the bearing grinder large quantities of stepper motor control into question the market, stepper motor system control more and more of the surface, single-axis stepper motor control system problems have less, but more than two axes stepper motor system, often the two systems are not synchronized, the size difference between the unstable faults such as loose. Stepper motor system problems are manifold.
    We grinder groove ball bearing inner ring analysis done, has tried several domestic brands of stepper motor, found no synchronization of the two systems is very serious. Starting synchronization error metric PLC, position control module, stepper motor drives and stepper motors. Ball screw lead 4mm, harmonic gear reducer ratio of 1:80, the moment the step angle 0.9 °, pulse equivalent to 0.125um. Repeat positioning error of the stepper motor has exceeded the machine's accuracy test three times. Calculated in accordance with the pulse equivalent 0.125um, table positioning error in the cumulative repeat 20 times has reached 0.003. We analyzed the machine feed mechanism and the compensation mechanism, find mechanical problems are more serious.
    First, the ball screw nominal diameter smaller (Φ20), precision grade 3 and low, and feel creeping phenomenon is more serious; second feed cylinder and ball screw design quick hop over positioning, assembly position error can not be eliminated; Third, only harmonic reducer and ball screw or pin lock no linkage links; fourth, did not use the ball screw bearings and so on. And analysis of the electrical system of the machine and found that the inverter, transformer and stepper motor controller placed near bias, not shielded from the PLC output data cable with disk mixed electric and electronic cables and so on. These problems are affecting the stepper motor system instability.
    Due to the current poor anti-interference ability of the stepper motor system, these electrical design layout unreasonable direct feed system will produce occasional errors and compensation systems, coupled with systematic error of the mechanical system, the machine will be in precarious work state. Not to say that as long as the machine's hydraulic system feeding into the compensation to the compensation system, the entire overall performance machine will certainly significantly improve the stepper motor. Stepper motor to replace the original complex hydraulic feed compensation system, the original hydraulic machinery parts processing fluctuations and error elimination of the transmission chain, and the stepper motor feeding process can be divided into several phases, each can choose different the pulse frequency control the feed rate, the number of pulses can be used to control the machine table sophistication to, it is indeed the original hydraulic system than the bearing grinder progress a big step. However, the attendant is other relevant parts of the machine have to follow the updated design will meet the technical requirements of the machine grinding. Whether it is design or design of the mechanical structure of the electrical system should not be overlooked stepping cautiously systems characteristic of weak anti-interference ability. If the solutions above are questions we do not properly resolved, if the whole machine parts, especially the key parts of the machine or the original standard hydraulic system, using a stepper motor system control bearing grinder will not be improved by nature . Of course, the most thorough way is using the most advanced servo motor control system. Servo motor control system bearing grinder, will soon jump to remove the cylinder and harmonic reducer, ball screw and servo motor direct linking structure, making the mechanical system error is minimized.