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離心泵的設計及其密封(doc畢業(yè)設計論文)-資料下載頁

2025-06-28 21:05本頁面
  

【正文】 put signal, EA and EB signal used for position, the signal for the origin EZ index signal. Each axis has a switching signal origin through the mechanical origin of the signal input shaft to find the original point of origin can be set through the software switchmode. Each axis has two locations spacing signal EL + (positive spacing) and EL(reverse Limit), the limit set by switchmode software. In this system, the Xaxis and the Zaxis servo motor feedback encoder pulse signal have access Motion Control Card. Since the initial movement of each axis there is a start bit, it was necessary to signal to the original point, the search software to determine the origin signal the start bit. X axis rotation direction, do not limit pros and cons, using only a signal origin. Apart from the Zaxis origin signal, but also limit access plus or minus two position signals from the two limit protection. I universal digital input and output can also be used to access some of the switch signal. The single campaign, according to campaigndistance, the motion control card, the mode of operation and continuous operation mode. According to the velocity, the trapezoidal motion control card that runs at Scurve pattern and operation mode. Scurve model used to run a shaft that runs at the Scurve designated pulse number of Scurve model can be run effectively and to improve acceleration and deceleration eliminate the vibration, so that movement is very smooth. Figure 4 shows the following: Figure 4 Scurve velocity and acceleration Since S curve in a trapezoidal mode runs at the merits of this system are used in the operation mode Scurve. Before the start of the scan, in order to measure the floor straight shoe last longer need to shoe last turn certain angle, and then use fixedlength operation mode. In the scanning process, the Zaxis and the Xaxis but at the same time the implementation of an independent movement, and movement is continuous. This twoaxis at the same time guarantee a certain percentage of the speed sports. Actual circumstances, the Motion Control Card of the system can meet the requirements of shoe last of the threedimensional data scanning, and thus gained threedimensional data files shoe last. servo motor control and choice Since the control system for the realtime requirement is relatively high, motion control card sent to the motor drive pulses to the pulse motor immediately, not delayed, not wrong. Thus the control system could not be used stepper motor and servo motor systems must be used. At the same time servo motor control with high accuracy, strong Guozainaili, speed response performance, and reliable operation of a series of advantages. In this system, we have selected Panasonic Digital MSDA0231A1A AC servo drives, servo motor configuration for MSM022A1. Bring the drive motor rated output power of kw, incremental rotary encoder for the P2500 / r, 3phase input power for 220 V, rated speed of 2000 r / m. Request to place the system more accurate rapidly, as in the shoe last lap to (Xaxis rotation lap) needs hundreds of sampling point, the response of the servo system requirements relatively high. At the same time, the servo motor parameters on the quality of scanning has a certain impact. Used in the control system mode, the servo motor will be adjusted to the parameters of a better situation, mainly the following parameters. 1. parameters (location of the first loop gain) definition of the position control response curve, the higher gain settings, the faster positioning time. 2. parameters (first speed loop gain) and the parameters servo system with access to the total response curve. As far as possible, highgain settings. 3. parameters (speed feedforward) to set the pace in the position control of feedforward. In the constant speed motor running, if this value as a 100% position deviation almost zero. This value is set higher, so to a lesser position error was faster response, but it may lead to overshoot. By , parameter settings can be very convenient with a variety of mand pulse frequency matched to achieve the desired control resolution (angle / pulse). The value of the difference between the two caused the decline in control accuracy. It is remended settings (ie: electronic gear ratio): 1 / 50 electronic gear ratio 20. optical grating choice and control    In the control system, grating Yaxis device for the collection of data, it installed in the back of scanning round, the scanning process, moving around constantly scanning round, which will stimulate mobile device grating, grating device to collect feedback to the pulse signal movement control card. With practical applications, considering the accuracy, reliability, economy, and other factors, we selected FAGOR MVX225 linear optical grating. It uses the glass chrome scale Ceju 20 um, accuracy of 177。 5um, a resolution of 1 um, the differential output signals to TTL signal, the output signal cycle T for the 4 um, maximum speed of 60 m / min. In this system, nonstop around the grating device needs mobile, and the grating first mobile device using Rolling reading can be minimal decrease wear and tear, greatly improved life, the grating foot mobile life over 9,000 km. FAGOR feedback system provides signals through the plating carved in the chrome line ruler grid through photoelectric conversion signal processing. FAGOR feedback system using infrared lightemitting diodes as a light source, the light source is safe, reliable and long life characteristics. To provide a measurement of the absolute reference point, linear optical grating feedback carved lines near the location of certain reference points marked signal. This signal is marked by a specific line carved a pulse when running through the machine points to determine the absolute position, which is to pr
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