{"id":1118,"date":"2016-05-18T18:31:49","date_gmt":"2016-05-18T10:31:49","guid":{"rendered":"http:\/\/www.kumouse.com\/?p=1118"},"modified":"2016-05-18T18:31:49","modified_gmt":"2016-05-18T10:31:49","slug":"a4988%e6%ad%a5%e8%bf%9b%e7%94%b5%e6%9c%ba%e9%a9%b1%e5%8a%a8%e5%99%a8%e8%b0%83%e8%8a%82%e9%a9%b1%e5%8a%a8%e5%8a%9b%e5%ba%a6","status":"publish","type":"post","link":"https:\/\/www.kumouse.com\/?p=1118","title":{"rendered":"A4988\u6b65\u8fdb\u7535\u673a\u9a71\u52a8\u5668\u8c03\u8282\u9a71\u52a8\u529b\u5ea6"},"content":{"rendered":"

\u7279\u522b\u6ce8\u610f\uff1a\u6d4b\u91cf\u7535\u538b\u7684\u65f6\u5019\u5343\u4e07\u8981\u5c0f\u5fc3\uff0c\u4e0d\u8981\u77ed\u8def\u5230\u4e0d\u8be5\u78b0\u5230\u7684\u63a5\u70b9\uff0c\u5f88\u53ef\u80fd\u4f1a\u9020\u62104988\u70e7\u6bc1!!!<\/p>\n

\u7279\u522b\u6ce8\u610f\uff1a4988\u7684\u8f93\u51fa\u7535\u6d41\uff0c\u8d85\u8fc71\u5b89\u57f9\u7684\u8bdd\uff0c\u5fc5\u987b\u52a0\u88c5\u6563\u70ed\u7247\u3002\u00a0\u8d85\u8fc71.5\u5b89\u57f9\uff0c\u9700\u8981\u518d\u52a0\u98ce\u6247\u3002\u00a0\u5c31\u7b97\u6709\u5b89\u88c5\u6563\u70ed\u7247\u3001\u98ce\u6247\uff0c\u8f93\u51fa\u7535\u6d41\u4e5f\u4e0d\u5e94\u8d85\u8fc72\u5b89\u57f9\u3002\u00a0\u5426\u5219\u6709\u70e7\u6bc1\u7684\u5371\u9669\u3002<\/p>\n

\u6839\u636ePololu\u4ea7\u54c1\u7f51\u9875<\/a>\u4e0a\u7684\u8bf4\u660e\uff0c\u4e00\u822c\u6b65\u8fdb\u9a6c\u8fbe\u4f7f\u75284988\u9a71\u52a8\u65f6\uff0c\u6b65\u8fdb\u9a6c\u8fbe\u5b9e\u9645\u6d4b\u91cf\u5230\u7684\u7535\u6d41\uff0c\u5927\u7ea6\u662f4988\u8f93\u51fa\u7535\u6d41\u4e0a\u9650\u76840.7\u500d\u3002\u00a0\u6240\u4ee5\u9700\u8981\u8bbe\u5b9a\u7684\u7535\u6d41\u8f93\u51fa\u4e0a\u9650\uff0c\u4f1a\u662f\u9a6c\u8fbe\u6807\u5b9a\u7684\u989d\u5b9a\u7535\u6d41\u9664\u4ee50.7\u3002<\/p>\n

4988\u8f93\u51fa\u7535\u6d41\u4e0a\u9650\u7684\u8ba1\u7b97\u516c\u5f0f\uff1a\u00a0I=Vref \/ 8 * Rs
\nVref\u662f\u53c2\u8003\u7535\u538b\uff0c\u5229\u7528\u53ef\u53d8\u7535\u963b\u8bbe\u8ba1\u51fa\u53ef\u4ee5\u8c03\u6574Vref\u7684\u7535\u8def\uff0c\u8ba9\u4f7f\u7528\u8005\u80fd\u591f\u81ea\u884c\u8c03\u6574\u8f93\u51fa\u7535\u6d41\u4e0a\u9650\u3002<\/p>\n

Rs\u662f\u53c2\u8003\u7535\u963b\u3002\u00a0\u76ee\u524d\u5e02\u9762\u4e0a\u4e70\u7684\u5230\u76844988\u6a21\u7ec4\uff0c\u53c2\u8003\u7535\u7ec4\u6709\u4e09\u79cd\uff0c\u8981\u81ea\u5df1\u770b\u4e00\u4e0b\u3002\u00a0Pololu\u5382\u5546\u8bbe\u8ba1\u7684\u7535\u8def\uff0cRs\u662f0.05\u6b27\u59c6\uff1bStepStick(Open Source Project)\u6240\u516c\u5e03\u7684\u7535\u8def\uff0c\u67090.2\u53ca0.1\u6b27\u59c6\u4e24\u79cd\u89c4\u683c\u3002\u00a0\u4f7f\u7528\u7684\u662fSMD \u7535\u963b\uff0c”R050″\u4ee3\u88680.05\u6b27\u59c6\uff1b”R200″\uff0c\u4ee3\u88680.2\u6b27\u59c6\uff1b”R10″\uff0c\u4ee3\u88680.1\u6b27\u59c6\u3002\u00a0(\u00a0SMD\u6676\u7247\u7535\u963b\u963b\u503c\u6807\u793a\u65b9\u6cd5<\/a>\u00a0)
\n\u4f4d\u7f6e\u5982\u56fe\uff1a<\/p>\n

 <\/p>\n

\u53c2\u8003\u7535\u538b\u6d4b\u91cf\u65b9\u5f0f<\/strong><\/p>\n

\u53ef\u53d8\u7535\u963b\u7684\u91d1\u5c5e\u87ba\u4e1d\u5934\uff0c\u5c31\u662fVref\u7684\u6d4b\u91cf\u70b9\uff0c\u7528\u4e09\u7528\u70b9\u8868\u7684\u6b63\u6781\u505a\u6d4b\u91cf\u3002\u00a0\u63a5\u5730\u70b9\u5728\u56fe\u4e2d\u6700\u53f3\u4e0b\u89d2\u7684pin\u9488\uff0c\u65c1\u8fb9\u7684\u4e1d\u5370\u8bb0\u53f7\u6709\u6807\u6ce8”GND”\u3002<\/p>\n

\u4e3e\u4f8b\u8bf4\u660e<\/strong><\/p>\n

\u5982\u679c\u4f60\u4e70\u5230\u7684\u6b65\u8fdb\u9a6c\u8fbe\uff0c\u989d\u8ba2\u7535\u6d41\u662f1.5\u5b89\u57f9\uff0c\u90a34988\u8f93\u51fa\u7535\u6d41\u4e0a\u9650\u4f1a\u662f1.5\/0.7 = 2.14 \u5b89\u57f9\u3002
\n\u7136\u540e\u518d\u67e5\u770b4988\u6a21\u7ec4\u4e0a\u7684Rs\uff0c\u5982\u679c\u662f0.2\u6b27\u59c6\uff0c\u90a3\u4f60\u9700\u8981\u628aVref\u8c03\u6574\u6210(1.5\/0.7)*8*0.2 = 3.43 \u4f0f\u7279\u3002<\/p>\n

\u53c2\u8003\u7535\u538b\u901f\u67e5\u8868<\/strong><\/p>\n

\u7f16\u6309\uff1a\u00a0Vref\u53d7\u5230\u63a7\u5236\u677f\u4e0a\u5206\u538b\u7535\u8def\u7684\u9650\u5236\uff0c\u4e0d\u4e00\u5b9a\u80fd\u8c03\u6574\u51fa\u8868\u5217\u7684\u7535\u538b\u3002<\/p>\n

Rs = 0.2\u00a0\u03a9<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u9a6c\u8fbe\u989d\u8ba2\u7535\u6d41(A)<\/td>\n4988\u8f93\u51fa\u7535\u6d41\u4e0a\u9650(A)<\/td>\nRs(\u03a9)<\/td>\n4988\u53c2\u8003\u7535\u538bVref\u5e94\u8bbe\u5b9a\u6210(V)<\/td>\n<\/tr>\n
2<\/td>\n2.86<\/td>\n0.2<\/td>\n4.57<\/td>\n<\/tr>\n
1.9<\/td>\n2.71<\/td>\n0.2<\/td>\n4.34<\/td>\n<\/tr>\n
1.8<\/td>\n2.57<\/td>\n0.2<\/td>\n4.11<\/td>\n<\/tr>\n
1.7<\/td>\n2.43<\/td>\n0.2<\/td>\n3.89<\/td>\n<\/tr>\n
1.6<\/td>\n2.29<\/td>\n0.2<\/td>\n3.66<\/td>\n<\/tr>\n
1.5<\/td>\n2.14<\/td>\n0.2<\/td>\n3.43<\/td>\n<\/tr>\n
1.4<\/td>\n2.00<\/td>\n0.2<\/td>\n3.20<\/td>\n<\/tr>\n
1.3<\/td>\n1.86<\/td>\n0.2<\/td>\n2.97<\/td>\n<\/tr>\n
1.2<\/td>\n1.71<\/td>\n0.2<\/td>\n2.74<\/td>\n<\/tr>\n
1.1<\/td>\n1.57<\/td>\n0.2<\/td>\n2.51<\/td>\n<\/tr>\n
1<\/td>\n1.43<\/td>\n0.2<\/td>\n2.29<\/td>\n<\/tr>\n
0.9<\/td>\n1.29<\/td>\n0.2<\/td>\n2.06<\/td>\n<\/tr>\n
0.8<\/td>\n1.14<\/td>\n0.2<\/td>\n1.83<\/td>\n<\/tr>\n
0.7<\/td>\n1.00<\/td>\n0.2<\/td>\n1.60<\/td>\n<\/tr>\n
0.6<\/td>\n0.86<\/td>\n0.2<\/td>\n1.37<\/td>\n<\/tr>\n
0.5<\/td>\n0.71<\/td>\n0.2<\/td>\n1.14<\/td>\n<\/tr>\n
0.4<\/td>\n0.57<\/td>\n0.2<\/td>\n0.91<\/td>\n<\/tr>\n
0.3<\/td>\n0.43<\/td>\n0.2<\/td>\n0.69<\/td>\n<\/tr>\n
0.2<\/td>\n0.29<\/td>\n0.2<\/td>\n0.46<\/td>\n<\/tr>\n
0.1<\/td>\n0.14<\/td>\n0.2<\/td>\n0.23<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Rs = 0.1\u00a0\u03a9<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u9a6c\u8fbe\u989d\u8ba2\u7535\u6d41(A)<\/td>\n4988\u8f93\u51fa\u7535\u6d41\u4e0a\u9650(A)<\/td>\nRs(\u03a9)<\/td>\n4988\u53c2\u8003\u7535\u538bVref\u5e94\u8bbe\u5b9a\u6210(V)<\/td>\n<\/tr>\n
2<\/td>\n2.86<\/td>\n0.1<\/td>\n2.29<\/td>\n<\/tr>\n
1.9<\/td>\n2.71<\/td>\n0.1<\/td>\n2.17<\/td>\n<\/tr>\n
1.8<\/td>\n2.57<\/td>\n0.1<\/td>\n2.06<\/td>\n<\/tr>\n
1.7<\/td>\n2.43<\/td>\n0.1<\/td>\n1.94<\/td>\n<\/tr>\n
1.6<\/td>\n2.29<\/td>\n0.1<\/td>\n1.83<\/td>\n<\/tr>\n
1.5<\/td>\n2.14<\/td>\n0.1<\/td>\n1.71<\/td>\n<\/tr>\n
1.4<\/td>\n2.00<\/td>\n0.1<\/td>\n1.60<\/td>\n<\/tr>\n
1.3<\/td>\n1.86<\/td>\n0.1<\/td>\n1.49<\/td>\n<\/tr>\n
1.2<\/td>\n1.71<\/td>\n0.1<\/td>\n1.37<\/td>\n<\/tr>\n
1.1<\/td>\n1.57<\/td>\n0.1<\/td>\n1.26<\/td>\n<\/tr>\n
1<\/td>\n1.43<\/td>\n0.1<\/td>\n1.14<\/td>\n<\/tr>\n
0.9<\/td>\n1.29<\/td>\n0.1<\/td>\n1.03<\/td>\n<\/tr>\n
0.8<\/td>\n1.14<\/td>\n0.1<\/td>\n0.91<\/td>\n<\/tr>\n
0.7<\/td>\n1.00<\/td>\n0.1<\/td>\n0.80<\/td>\n<\/tr>\n
0.6<\/td>\n0.86<\/td>\n0.1<\/td>\n0.69<\/td>\n<\/tr>\n
0.5<\/td>\n0.71<\/td>\n0.1<\/td>\n0.57<\/td>\n<\/tr>\n
0.4<\/td>\n0.57<\/td>\n0.1<\/td>\n0.46<\/td>\n<\/tr>\n
0.3<\/td>\n0.43<\/td>\n0.1<\/td>\n0.34<\/td>\n<\/tr>\n
0.2<\/td>\n0.29<\/td>\n0.1<\/td>\n0.23<\/td>\n<\/tr>\n
0.1<\/td>\n0.14<\/td>\n0.1<\/td>\n0.11<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Rs = 0.05\u00a0\u03a9<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u9a6c\u8fbe\u989d\u8ba2\u7535\u6d41(A)<\/td>\n4988\u8f93\u51fa\u7535\u6d41\u4e0a\u9650(A)<\/td>\nRs(\u03a9)<\/td>\n4988\u53c2\u8003\u7535\u538bVref\u5e94\u8bbe\u5b9a\u6210(V)<\/td>\n<\/tr>\n
2<\/td>\n2.86<\/td>\n0.05<\/td>\n1.14<\/td>\n<\/tr>\n
1.9<\/td>\n2.71<\/td>\n0.05<\/td>\n1.09<\/td>\n<\/tr>\n
1.8<\/td>\n2.57<\/td>\n0.05<\/td>\n1.03<\/td>\n<\/tr>\n
1.7<\/td>\n2.43<\/td>\n0.05<\/td>\n0.97<\/td>\n<\/tr>\n
1.6<\/td>\n2.29<\/td>\n0.05<\/td>\n0.91<\/td>\n<\/tr>\n
1.5<\/td>\n2.14<\/td>\n0.05<\/td>\n0.86<\/td>\n<\/tr>\n
1.4<\/td>\n2.00<\/td>\n0.05<\/td>\n0.80<\/td>\n<\/tr>\n
1.3<\/td>\n1.86<\/td>\n0.05<\/td>\n0.74<\/td>\n<\/tr>\n
1.2<\/td>\n1.71<\/td>\n0.05<\/td>\n0.69<\/td>\n<\/tr>\n
1.1<\/td>\n1.57<\/td>\n0.05<\/td>\n0.63<\/td>\n<\/tr>\n
1<\/td>\n1.43<\/td>\n0.05<\/td>\n0.57<\/td>\n<\/tr>\n
0.9<\/td>\n1.29<\/td>\n0.05<\/td>\n0.51<\/td>\n<\/tr>\n
0.8<\/td>\n1.14<\/td>\n0.05<\/td>\n0.46<\/td>\n<\/tr>\n
0.7<\/td>\n1.00<\/td>\n0.05<\/td>\n0.40<\/td>\n<\/tr>\n
0.6<\/td>\n0.86<\/td>\n0.05<\/td>\n0.34<\/td>\n<\/tr>\n
0.5<\/td>\n0.71<\/td>\n0.05<\/td>\n0.29<\/td>\n<\/tr>\n
0.4<\/td>\n0.57<\/td>\n0.05<\/td>\n0.23<\/td>\n<\/tr>\n
0.3<\/td>\n0.43<\/td>\n0.05<\/td>\n0.17<\/td>\n<\/tr>\n
0.2<\/td>\n0.29<\/td>\n0.05<\/td>\n0.11<\/td>\n<\/tr>\n
0.1<\/td>\n0.14<\/td>\n0.05<\/td>\n0.06<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u53c2\u8003\u8d44\u6599
\nhttp:\/\/www.eng.utah.edu\/~cs5789\/handouts\/a4988_DMOS_microstepping_driver_with_translator.pdf<\/p>\n

http:\/\/reprap.org\/wiki\/StepStick
\nhttp:\/\/reprap.org\/wiki\/Sanguinololu
\nhttp:\/\/www.pololu.com\/product\/1182<\/p>\n","protected":false},"excerpt":{"rendered":"

\u7279\u522b\u6ce8\u610f\uff1a\u6d4b\u91cf\u7535\u538b\u7684\u65f6\u5019\u5343\u4e07\u8981\u5c0f\u5fc3\uff0c\u4e0d\u8981\u77ed\u8def\u5230\u4e0d\u8be5\u78b0\u5230\u7684\u63a5\u70b9\uff0c\u5f88\u53ef\u80fd\u4f1a\u9020\u62104988\u70e7\u6bc1!!! \u7279\u522b\u6ce8\u610f\uff1a498 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-1118","post","type-post","status-publish","format-standard","hentry","category-3d"],"_links":{"self":[{"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/posts\/1118","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1118"}],"version-history":[{"count":1,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/posts\/1118\/revisions"}],"predecessor-version":[{"id":1119,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=\/wp\/v2\/posts\/1118\/revisions\/1119"}],"wp:attachment":[{"href":"https:\/\/www.kumouse.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1118"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1118"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kumouse.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}