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Electro-hydraulic servo stepping control of synchronous

Axis) rotation, drive screw 12, rotation control, control, reverse axial displacement shaft 11. Attached to the control of the mandrel sleeve 5 on the reverse displacement. Close the control hole, the parts enough to stop oil flow l Bu movement in order to move a piston rod Yin is the input clock by the number and frequency control Kun stepper motor movement, the piston rod should have _f head displacement and velocity of movement, change the direction of movement of the stepper motor. The corresponding reverse movement of the piston rod of the two arrows indiscriminately in the external circuit for the entrance and the flow direction, the sensor 10 for non-contact proximity switch, the prosecution removed the signal of a torque limiting Ⅱ. . With 1 for, the induction ring block 9 to leave the sensor,[link widoczny dla zalogowanych], proximity switch no signal output. When the hydraulic cylinder piston rod 8 feet or overloading is blocked. Axis of the rod 6 can not move Sou. Il continue to control stepper motor drive shaft for axial movement. When the displacement reaches a certain value so that inductive proximity sensor ring block 9. Close to the switch 10 output overload signal. Stepper motor control device to stop the movement even if the proximity switch failure. The output of valve spool displacement signal, the control valve opening 【_I size, so that one ... _ a hydraulic cylinder. . Generate displacement rod. In the body every 2 digital valve Lian internal block diagram of the hydraulic cylinder position 0 and the formation of negative feedback, where u win: If a flow gain, the effective surface of the piston has a secret. A hydraulic damping ratio, a hydraulic undamped natural frequency c = (2) curly Kql x by (3) shows that the stepper motor angular displacement 0 and the displacement of hydraulic cylinder piston rod has a linear relationship, the transfer function is a typical I-system, the system step input without steady-state error, left foot ramp input} steady-state error under the time-honored values, its value and mechanical open system 8 4 1999 residue amplification factor is inversely proportional to the system. From the theoretical analysis, the system less subject to interference factor, easy to control, which is very conducive to simultaneously control 3-axis body works anonymous synchronous mechanism for the folding machine 3 horizontal movement direction of the axis body processing simultaneous movement diagram, activity by the dual-die axis electro-hydraulic servo synchronized stepper drive. Work, the corresponding two stepper motor driven hydraulic valve is synchronized, the drive along parts of its hydraulic cylinder piston rod wide _l encoder bored Figure 3-axis digital synchronous movement organizations arrows indicate the direction parallel to the Kids in the stepper motor moves, the two pressure Workpiece middle sacral mold processing, processing activities, workers die clamping plate to the left into the movement. Fixed hourly air-way release the steel die, fast right back to the beginning: the parallel shift in the bias is only allowed within a narrow range: detection of movement axis rack and pinion rotary encoder |; i connected to the hydraulic cylinder moving parts. Schematic diagram of dual-axis synchronous control organizations such as 4 follows: pre-industrial control stepper motor proud of machines running the control pulse acceleration and deceleration curves, and simultaneous output to two stepper motor drive power for a given client, so that the two step synchronous motor and servo hydraulic cylinder movement. Adjustment is used when the treatment would be independent or simultaneous control of each axis movement by the rotary encoder to monitor the location of the axis a = 4 control and testing ... __--] rotary encoder! Around 4 dual-axis synchronous control signal solid-driven organization servo-hydraulic cylinder with two-phase hybrid stepping motor stepper motor, with torque, current,[link widoczny dla zalogowanych], and smaller high-frequency characteristics is good. The drive power was a new type of highly integrated power electronic devices, small size, low power consumption, drive current rises rapidly, torque, drive frequency up to 30KHz to 』:. Drive power input side are all controlled by optical isolation, anti-interference ability here to feed stepper motor step angle is 0.9. ,[link widoczny dla zalogowanych], Driven by servo-hydraulic cylinder pulse equivalent 0.05ram, when the operating frequency reaches 6KHz,[link widoczny dla zalogowanych], through the die on the activities of the synchronous digital servo-controlled hydraulic cylinders and testing them simultaneously run error ≤ 0.1mm. If a shaft is not enough oil pressure or external movement is blocked, the error may exceed 0.1mm,[link widoczny dla zalogowanych], can stop the alarm, adjust, or troubleshoot problems before it can continue running. Figure 5 shows the block diagram of synchronous control signal the main program. Shown, the setting, the work permit \necessary step to avoid the motor of each channel opening or block the operation. \, slow, uniform, or even manually track working condition. As a result of modular programming. to wear convenience. encoders for real-time monitoring of the location of motion axes, such as the detection of motion and control does not match the given requirements, will be carried out especially in the position compensation start and stop movement from Ha l load change is not synchronized with the encoder synchronization error is detected, real-time location of a corresponding adjustment to the output pulse control procedures to ensure the synchronization error compensation.
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