3. The positioning monitoring situation is as follows: To ensure that the axis reaches the specified point within the predetermined time, the time set in MD: POSITIONING_TIME (fine positioning delay) is started after the end of one block operation (position quantity = 0), and here Check if the movement error is lower than the limit value of STOP_LIMIT_FINE after the end of the run. If the position control gain factor is too small, change the position control gain adjustment machine data MD: POSCTRL_GAIN(N) setting value; if the positioning window (precise stop) does not match the position monitoring time and position control gain coefficient, change MD: STOP_LIMIT_FINE (Exact stop), MD: POSITIONING_TIME (precise stop delay time), MD: POSCTRL_GAIN (N) These parameters are set.
4. In the switching output circuit, the power contactor and the solenoid valve of the strong circuit are controlled by the intermediate relay, and the protection diode is added in parallel to provide a release circuit for the current when the coil is cut off to protect the numerical control driving circuit.
5. In order to improve the anti-interference ability of the whole system, the weak electric signal and the strong electric drive signal are routed as much as possible in the wire trough, and the RC arc extinguisher is connected in parallel near the AC contactor coil. To ensure the reliability of the CNC system.
V. Conclusion
The high-pressure water jet machine adopts Siemens SINUMERIK 802S numerical control system to solve the instability of the original domestic machine tool numerical control system, and fully utilizes the rich error compensation function of the system, which greatly improves the reliability of the whole machine and the function of the machine tool.
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