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small;"><strong><span class="15" style="font-family: 宋体; letter-spacing: -1pt;">3.3.3</span><span class="15" style="font-family: 宋体; letter-spacing: -1pt;"> </span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">DXF</span><span style="font-family: 宋体; letter-spacing: 0pt;"> </span><span style="font-family: 宋体; letter-spacing: 0pt;">绘图</span></strong></span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;"><o:p></o:p></span></p> <p class="NewStyle19" style="margin-left: 0pt; text-indent: 18pt; line-height: 19.9pt;"><span style="font-size: small;"><span style="font-family: 宋体; letter-spacing: 0pt;">三维绘图软件</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">CITIA</span><span style="font-family: 宋体; letter-spacing: 0pt;">、</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">PRO</span><span style="font-family: 宋体; letter-spacing: 0pt;">/</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">E</span><span style="font-family: 宋体; letter-spacing: 0pt;">、</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">AutoCAD</span><span style="font-family: 宋体; letter-spacing: 0pt;">等均可将三维实体数据直接生成数控加工代 码。</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">DXF</span><span style="font-family: 宋体; letter-spacing: 0pt;">文件是许多</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">CAD</span><span style="font-family: 宋体; letter-spacing: 0pt;">/</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">CAM</span><span style="font-family: 宋体; letter-spacing: 0pt;">软件所共享互换的一种图形交换数据文件，系统可从 </span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">CAD</span><span style="font-family: 宋体; letter-spacing: 0pt;">/</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">CAM</span><span style="font-family: 宋体; letter-spacing: 0pt;">软件生成的</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">DXF</span><span style="font-family: 宋体; letter-spacing: 0pt;">格式文件中自动的提取关键信息，然后转化为数控系统所需 求的加工零件的指令代码，无需人工干预，形成计算机自动传输数据要求的格式</span><span style="font-family: 宋体; letter-spacing: 0pt; vertical-align: super;">[38]</span><span style="font-family: 宋体; letter-spacing: 0pt;">。基于 </span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">PMAC</span></span><b><span lang="EN-US" style="font-size:10.5pt;mso-bidi-font-size:10.0pt;font-family:"Times New Roman"; mso-fareast-font-family:宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US; mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA"><a href="http://www.bethel-cnc.com/"><span style="font-size: small;"><span lang="EN-US" style="font-family: 宋体;">加工中心</span></span></a></span></b><span style="font-size: small;"><span style="font-family: 宋体; letter-spacing: 0pt;">数控系统以</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">VisualBasic</span><span style="font-family: 宋体; letter-spacing: 0pt;">6</span><span style="font-family: 宋体; letter-spacing: 0pt;">编写稈序读取</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">DXF</span><span style="font-family: 宋体; letter-spacing: 0pt;">文件，并目</span><span style="font-family: 宋体; letter-spacing: 0pt;">.</span><span style="font-family: 宋体; letter-spacing: 0pt;">从给定段的给定 对象中提取特定代码和值，生成数控加工程序，如图</span><span style="font-family: 宋体; letter-spacing: 0pt;">3-9</span><span style="font-family: 宋体; letter-spacing: 0pt;">所示。</span></span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;"><o:p></o:p></span></p> <p><span style="font-size: small;"><span class="15" style="line-height: 19.9pt; text-indent: 18pt; font-family: 宋体; letter-spacing: -1pt;">3.3.4</span><span class="18" style="line-height: 19.9pt; text-indent: 18pt; font-family: 宋体; letter-spacing: 0pt; font-weight: bold;">手轮功能</span></span></p> <p><span style="font-size: small;"> <span style="line-height: 21.85pt; text-indent: 18pt; font-family: 宋体; letter-spacing: 0pt;">手轮功能在机床使用中占有很重要的位置，工件对刀、各轴微动控制都需要用到手轮。 手轮功能的实现难点在于手轮和被控轴运动的跟随性，跟随性可分为两个方面，移动距离 和移动速度。基于</span><span class="16" style="line-height: 21.85pt; text-indent: 18pt; font-family: 'Times New Roman'; letter-spacing: 0pt;">PMAC</span></span><span style="font-size: small;"><b><span lang="EN-US" style="font-family: 'Times New Roman';"><a href="http://www.bethel-cnc.com/bethel/cnc/">CNC<span lang="EN-US" style="font-family: 宋体;"><span lang="EN-US">加工中心</span></span></a></span></b><span style="line-height: 21.85pt; text-indent: 18pt; font-family: 宋体; letter-spacing: 0pt;">数控系统研究了一种基于</span><span class="16" style="line-height: 21.85pt; text-indent: 18pt; font-family: 'Times New Roman'; letter-spacing: 0pt;">VB</span><span style="line-height: 21.85pt; text-indent: 18pt; font-family: 宋体; letter-spacing: 0pt;">和</span><span class="16" style="line-height: 21.85pt; text-indent: 18pt; font-family: 'Times New Roman'; letter-spacing: 0pt;">PMAC</span><span style="line-height: 21.85pt; text-indent: 18pt; font-family: 宋体; letter-spacing: 0pt;">实现数控系统 手轮控制的方法，利用</span><span class="16" style="line-height: 21.85pt; text-indent: 18pt; font-family: 'Times New Roman'; letter-spacing: 0pt;">VB</span><span style="line-height: 21.85pt; text-indent: 18pt; font-family: 宋体; letter-spacing: 0pt;">编写实现手轮功能的上位机软件，实现手轮数据的获取与处理, 利用</span><span class="16" style="line-height: 21.85pt; text-indent: 18pt; font-family: 'Times New Roman'; letter-spacing: 0pt;">PMAC</span><span style="line-height: 21.85pt; text-indent: 18pt; font-family: 宋体; letter-spacing: 0pt;">控制各轴的运动，实现了数控系统的手轮控制</span><span style="line-height: 21.85pt; text-indent: 18pt; font-family: 宋体; letter-spacing: 0pt; vertical-align: super;">[39]</span><span style="line-height: 21.85pt; text-indent: 18pt; font-family: 宋体; letter-spacing: 0pt;">。</span></span></p> <p class="NewStyle20" style="margin-left: 0pt; text-indent: 18pt; line-height: 21.85pt;"><span style="font-size: small;"><span style="font-family: 宋体; letter-spacing: 0pt;">手轮通过串口与上位机相连接并实现通讯。手轮相当于一个旋转编码器，旋转手轮即 可发出连续的八位十六进制数</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">A</span><span style="font-family: 宋体; letter-spacing: 0pt;">，</span><span style="font-family: 宋体; letter-spacing: 0pt;">每一个手轮位置都有独立的位置数</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">A</span><span style="font-family: 宋体; letter-spacing: 0pt;">。</span><span style="font-family: 宋体; letter-spacing: 0pt;">上位机接收到当 前手轮位置</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">A</span><span style="font-family: 宋体; letter-spacing: 0pt;">1</span><span style="font-family: 宋体; letter-spacing: 0pt;">之后，将其与上一次的位置</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">A</span><span style="font-family: 宋体; letter-spacing: 0pt;">0</span><span style="font-family: 宋体; letter-spacing: 0pt;">做差，得到差值</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">A</span><span style="font-family: 宋体; letter-spacing: 0pt;">，</span><span style="font-family: 宋体; letter-spacing: 0pt;">若</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">A</span><span style="font-family: 宋体; letter-spacing: 0pt;">>0</span><span style="font-family: 宋体; letter-spacing: 0pt;">则代表手轮正 转，若</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">A</span><span style="font-family: 宋体; letter-spacing: 0pt;"><0</span><span style="font-family: 宋体; letter-spacing: 0pt;">则代表手轮反转。然后将</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">I</span><span style="font-family: 宋体; letter-spacing: 0pt;"> </span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">A</span><span style="font-family: 宋体; letter-spacing: 0pt;"> </span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">I</span><span style="font-family: 宋体; letter-spacing: 0pt;">作为手轮移动距离。将当前手轮控制的机床 轴号存放在变量</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">Axis</span><span style="font-family: 宋体; letter-spacing: 0pt;">中，手轮关闭时</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">Axis</span><span style="font-family: 宋体; letter-spacing: 0pt;"> = 0,</span><span style="font-family: 宋体; letter-spacing: 0pt;">手轮切换到</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">X</span><span style="font-family: 宋体; letter-spacing: 0pt;">、</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">Y</span><span style="font-family: 宋体; letter-spacing: 0pt;">、</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">Z</span><span style="font-family: 宋体; letter-spacing: 0pt;">、</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">A</span><span style="font-family: 宋体; letter-spacing: 0pt;">时</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">Axis</span><span style="font-family: 宋体; letter-spacing: 0pt;">分别等 于1、2、3、4。将手轮的倍率存放在变量</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">Mag</span><span style="font-family: 宋体; letter-spacing: 0pt;">中，手轮倍率为1、10、100时，</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">Mag</span><span style="font-family: 宋体; letter-spacing: 0pt;">分别 等于1、10、100。</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">VB</span><span style="font-family: 宋体; letter-spacing: 0pt;">软件具体运行过程如下：</span></span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;"><o:p></o:p></span></p> <p class="NewStyle19" style="margin-left: 0pt; text-indent: 18pt; line-height: 21.85pt;"><span style="font-size: small;"><span class="18" style="font-family: 宋体; letter-spacing: 0pt;">在 </span><span style="font-family: 'Times New Roman'; letter-spacing: 0pt;">VB</span><span class="18" style="font-family: 宋体; letter-spacing: 0pt;"> </span><span class="18" style="font-family: 宋体; letter-spacing: 0pt;">软件中，通过命令 </span><span style="font-family: 'Times New Roman'; letter-spacing: 0pt;">retum_value</span><span class="18" style="font-family: 宋体; letter-spacing: 0pt;"> </span><span class="18" style="font-family: 宋体; letter-spacing: 0pt;">= </span><span style="font-family: 'Times New Roman'; letter-spacing: 0pt;">PmacGetResponseA</span><span class="18" style="font-family: 宋体; letter-spacing: 0pt;">(</span><span style="font-family: 'Times New Roman'; letter-spacing: 0pt;">DeviceNumber</span><span class="18" style="font-family: 宋体; letter-spacing: 0pt;">, </span><span style="font-family: 'Times New Roman'; letter-spacing: 0pt;">response</span><span class="18" style="font-family: 宋体; letter-spacing: 0pt;">, </span><span class="18" style="font-family: 宋体; letter-spacing: 0pt;">2</span><span class="18" style="font-family: 宋体; letter-spacing: 0pt;">55, "#1 p")实现轴的选择。通过给字符串变量 bl 赋值，实现倍率的控制，即：bl = Mag *</span><span class="18" style="font-family: 宋体; letter-spacing: 0pt;"> </span><span class="18" style="font-family: 宋体; letter-spacing: 0pt;">△。</span><span class="18" style="font-family: 宋体; letter-spacing: 0pt;">通过命令</span><span class="18" style="font-family: 宋体; letter-spacing: 0pt;"> </span><span class="18" style="font-family: 宋体; letter-spacing: 0pt; font-weight: bold;">return_value = PmacGetResponseA(0, response, 2, "#" + Str(n) + "j:-" & bl)</span><span class="18" style="font-family: 宋体; letter-spacing: 0pt;">实现</span></span><span style="font-family: 'Times New Roman'; letter-spacing: 0pt; font-size: 11.5pt;"><o:p></o:p></span></p> <p class="NewStyle20" style="margin-left: 0pt; text-indent: 0pt; line-height: 21.85pt;"><span style="font-size: small;"><span style="font-family: 宋体; letter-spacing: 0pt;">选定轴的轮动，实现手轮功能流程图如图</span><span style="font-family: 宋体; letter-spacing: 0pt;">3-10</span><span style="font-family: 宋体; letter-spacing: 0pt;">所示：</span></span><span style="font-family: 宋体; letter-spacing: 0pt; font-size: 11pt;"><o:p></o:p></span><span style="font-size: small;"><br /> </span></p> <p class="NewStyle21" style="margin-left: 0pt; text-indent: 0pt; line-height: 14pt;"><span style="font-size: small;"><span style="font-family: 宋体; letter-spacing: 0pt; font-weight: bold;">3.4</span><span style="font-family: 宋体; letter-spacing: 0pt; font-weight: bold;">本章小结</span></span><span style="font-family: 宋体; letter-spacing: 0pt; font-weight: bold; font-size: 14pt;"><o:p></o:p></span></p> <p class="NewStyle20" style="margin-left: 0pt; text-indent: 18pt; line-height: 19.9pt;"><span style="font-size: small;"><span style="font-family: 宋体; letter-spacing: 0pt;">基于</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">PMAC</span></span><b><span lang="EN-US" style="font-size:10.5pt;mso-bidi-font-size:10.0pt;font-family:"Times New Roman"; mso-fareast-font-family:宋体;mso-font-kerning:1.0pt;mso-ansi-language:EN-US; mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA"><a href="http://www.bethel-cnc.com/bethel/news/"><span style="font-size: small;"><span lang="EN-US" style="font-family: 宋体;">数控加工中心</span></span></a></span></b><span style="font-size: small;"><span style="font-family: 宋体; letter-spacing: 0pt;">数控系统利用</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">VB</span><span style="font-family: 宋体; letter-spacing: 0pt;">6.0</span><span style="font-family: 宋体; letter-spacing: 0pt;">开发简单合理的人机界面，阐述了上位机与 下位机</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">PMAC</span><span style="font-family: 宋体; letter-spacing: 0pt;">运动控制器的通讯动态链接库</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">Pcomm</span><span style="font-family: 宋体; letter-spacing: 0pt;">32</span><span style="font-family: 宋体; letter-spacing: 0pt;">中常用的函数，如何在</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">VB</span><span style="font-family: 宋体; letter-spacing: 0pt;">环境下 对</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">PMAC</span><span style="font-family: 宋体; letter-spacing: 0pt;">卡初始化，重点阐述以宏程序为例分析如何把</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">FANUC</span><span style="font-family: 宋体; letter-spacing: 0pt;">格式的程序转成</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">PMAC </span><span style="font-family: 宋体; letter-spacing: 0pt;">卡识别的程序，加工程序仿真图形中</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">R</span><span style="font-family: 宋体; letter-spacing: 0pt;">编程，读取</span><span class="16" style="font-family: 'Times New Roman'; letter-spacing: 0pt;">DXF</span><span style="font-family: 宋体; letter-spacing: 0pt;">文件，利用上位机实现手轮功能。</span><span style="font-family: 宋体; letter-spacing: 0pt;"><br clear="all" style="page-break-before:always;mso-break-type:section-break" /> </span></span></p> <p class="MsoNormal"><span style="font-size: small;"><span style="font-family: 宋体;">本文采摘自“基于</span><span lang="EN-US">PMAC</span><span style="font-family: 宋体;">的加工中心开放式数控系统研究”，因为编辑困难导致有些函数、表格、图片、内容无法显示，有需要者可以在网络中查找相关文章！</span><br /> </span></p> <p class="NewStyle20" style="margin-left: 0pt; text-indent: 18pt; line-height: 19.9pt;"><span style="font-size: small;"> </span></p> <p class="MsoNormal"><span style="font-size: small;"><span style="font-family: 宋体;">本文由伯特利数控整理发表文章均来自网络仅供学习参考，转载请注明！</span></span></p></div> <div class="blank30"></div> <!-- tag --> <div class="blank10"></div> 标签： <a href='/index.php?case=tag&act=show&tag=%E5%8A%A0%E5%B7%A5%E4%B8%AD%E5%BF%83' target='_blank'>加工中心</a> <a 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