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<table cellpadding="3" cellspacing="0" width="100%" class="forumline"> <thead> <caption><table border="0" cellspacing="0" cellpadding="0" width="100%" class="forumheader"> <tr> <td align="left" valign="bottom" width="25"><img src="http://picsrv.fora.pl/AcidTechTiger/images/hdr_left.gif" width="25" height="27" alt="" /></td> <td align="center" class="forumheader-mid">Topic review</td> <td align="right" valign="bottom" width="25"><img src="http://picsrv.fora.pl/AcidTechTiger/images/hdr_right.gif" width="25" height="27" alt="" /></td> </tr></table></caption> </thead> <tbody> <tr> <th class="thCornerL" width="22%" height="26">Author</th> <th class="thCornerR">Message</th> </tr> <tr> <td width="22%" align="left" valign="top" class="row1"><span class="name"><a name=""></a><b>lompiacv</b></span></td> <td class="row1" height="28" valign="top"><table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="100%"><img src="http://picsrv.fora.pl/AcidTechTiger/images/post_old.gif" width="12" height="9" alt="Post" title="Post" border="0" /><span class="postdetails">Posted: Wed 10:14, 01 Dec 2010<span class="gen"> </span> Post subject: MAC Wholesale Slant-hole drilling of small diamete</span></td> </tr> <tr> <td colspan="2"><hr /></td> </tr> <tr> <td colspan="2"><span class="postbody">Slant-hole drilling small aperture computer control system research and development <br /> <br /> <br />Development of the external circuit,<a href="http://www.mac-wholesaler.com/" target="_blank">MAC Wholesale</a>, lap 4 for zero-crossing detection and thyristor trigger circuit schematic sine wave crossing synchronization signal into the op-amp buck filter comparator output square wave signal generated by the optical isolation, all the way to the computer as a synchronization signal input The other way is to trigger the circuit to prevent false triggering SCR. To Figure 4, optical coupling 【zero-crossing detection circuit with SCR trigger port) l ~ N a two slant-hole drilling diameter 4qL computer control system research and development 29 jump was: l Factory sync signal two wins Kun output signal l0l0il amidine lIj main circuit schematic in Figure 6 together with the larger power devices Tsui components (, m a 150mA), will trigger the drive circuit with optical isolation integrated circuit has a strong anti-interference ability in Figure 5 is synchronized with the trigger pulse voltage signals waveform, the figure shows f. ~ F time can be output trigger pulse, and in the ~ period is not. DC motor speed control system main circuit diagram shown in Figure 6, the loss protection, in the excitation circuit in series between a small selection of the relay, when compared to motor field excitation power supply voltage plus the rated relay coil voltage and. Also in the rectifier circuit of the common circuit, generally increases, R SCR AC and DC side as overvoltage protection,<a href="http://www.sheepskinuggbootsaustralia.com/" target="_blank">sheepskin ugg boots</a>, overcurrent protection to quickly fuse as silicon,<a href="http://www.wholesale-puma.com/puma-mens-shoes/trionfo-low-baylee" target="_blank">PUMA trionfo baylee shoes</a>, but silicon will still be damaged,<a href="http://www.mac-wholesaler.com/mac-eyeshadow-14-eyeshadow-c-1_13/mac-88-color-eyeshadow" target="_blank">MAC 88 color eyeshadow</a>, the contactor off Open an instant, the transformer secondary release of energy generated in the high-voltage discharge between two contacts, so, s hard work leaving SCR damage. The R can be ruled out with this failure. Velocity feedback is shown in Figure 7, A / D converter circuit, the first analog signals into digital signals, and then enter the computer interface by the optical isolation. Consider the requirements of the speed control system, using A / D conversion set anonymous 7A / I) turn radius touch computer interface device into a schematic block ADC0809, and to form their own separate circuit NE555 clock signal, because only the way the analog signal input, Address line using switches. The conversion circuit the system completely solve the interference problem. 5 Conclusion This system has been put into production use, the actual proof, the aircraft high degree of automation, simple operation, to ensure accuracy and efficiency to address the special alloy processing small aperture slant-hole problem in this process, the product stable at 92% of qualified efficiency increased by 10 times, with very important practical significance and promotional value. L2 Guangdong Mechanical College Study Reference 1CecilLi. Smith. DIGITALCOMPUTERPROCESSCONTROL. Copyright1972, byinternationaltextbookcompany2 Chen Boshi. Automatic control system. Machinery Industry Press, Beijing. 19813 Huang Jun. Semiconductor converter technology. Beijing: China Machine Press. 19804 New Tang Lu. A good anti-jamming performance low cost A / D converter. Machine Tool & Hydraulics. 1989. (5) RESEARCHANDDEVELOPMENTOFMICRO-COMPUTERCONTROLSYSTEMOFALLTILTEDHOLEDRILLINGMACHINETangLuxinAbstractThispaperprovidesamethodofmachhaingalloyforsmalltiltedholedtillingma-chinewithhighaccuracy-Byincorporatingmicro - computercont, rolandfastcontrolmethod, shaftcontrol,<a href="http://www.mac-wholesaler.com/" target="_blank">mac cosmetics wholesale</a>, whichbelongstosmallcapacityspeedclosed-loopDCcontrolwithdigltaltrigger, isachieved. Cuttingoutputsandindexingareoptimized ・ Thusitim-provesmathiningqualRyandautomaticdegree ・ Ita1s. getsagoodeconomicalbenefit ・ Keywordsjmicro - computercontrol; optimize; digitaltriggerDCspeedregulation; tiltedholedrillingmachine <br /> <br />相关的主题文章： <br /> <br /> <br /> <a href="http://www.goldfashion.hk/bbs/viewthread.php?tid=601734&extra=page%3D1&frombbs=1" target="_blank">ugg boots australia DSTBC-DF-based wireless sensor network energy efficiency of</a> <br /> <br /> <a href="http://www.newssc.tv/plus/view.php?aid=123271" target="_blank">MAC 120 color eyeshadow Fluorene and oxadiazole im</a> <br /> <br /> <a href="http://www.wlzjx.gov.cn/Review.asp?NewsID=78" target="_blank">Practical GaInP-AlGaInP visible quantum well semiconductor lasers _476</a></span></td> </tr> </table></td> </tr> <tr> <td colspan="2" class="spaceRow"><img src="http://picsrv.fora.pl/AcidTechTiger/images/spacer.gif" alt="" width="1" height="1" /></td> </tr> </tbody> </table>
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