{"id":1518,"date":"2019-03-15T16:42:07","date_gmt":"2019-03-16T00:42:07","guid":{"rendered":"http:\/\/wonghoi.humgar.com\/blog\/?p=1518"},"modified":"2019-03-24T16:09:06","modified_gmt":"2019-03-25T00:09:06","slug":"wobbling-rotary-encoder-in-agilent-hp-keysight-6630b-series","status":"publish","type":"post","link":"https:\/\/wonghoi.humgar.com\/blog\/2019\/03\/15\/wobbling-rotary-encoder-in-agilent-hp-keysight-6630b-series\/","title":{"rendered":"Wobbling rotary encoder in Agilent\/HP\/Keysight 6630B series"},"content":{"rendered":"<p>6630 series system power supply is sturdy as a rock, but has a rotary encoder sticking out that it&#8217;s almost guaranteed to wobble if you buy it used.<\/p>\n<p>I thought they would have known better to secure the rotary encoder with a nut so it won&#8217;t wobble (HP usually does a perfect job making their designs reliable. This one is a rare miss), so I opened it up to see what I can do about it.<\/p>\n<p>My initial guess was that the solder joints were weakened as it was used to mechanically support external forces for users of the dial. But I was wrong.\u00a0Here&#8217;s what I&#8217;ve found:<\/p>\n\n\t\t<style type=\"text\/css\">\n\t\t\t#gallery-1 {\n\t\t\t\tmargin: auto;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-item {\n\t\t\t\tfloat: left;\n\t\t\t\tmargin-top: 10px;\n\t\t\t\ttext-align: center;\n\t\t\t\twidth: 50%;\n\t\t\t}\n\t\t\t#gallery-1 img {\n\t\t\t\tborder: 2px solid #cfcfcf;\n\t\t\t}\n\t\t\t#gallery-1 .gallery-caption {\n\t\t\t\tmargin-left: 0;\n\t\t\t}\n\t\t\t\/* see gallery_shortcode() in wp-includes\/media.php *\/\n\t\t<\/style>\n\t\t<div id='gallery-1' class='gallery galleryid-1518 gallery-columns-2 gallery-size-large'><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1519.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"584\" height=\"390\" src=\"https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1519-1024x683.jpg\" class=\"attachment-large size-large\" alt=\"\" srcset=\"https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1519-1024x683.jpg 1024w, https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1519-300x200.jpg 300w, https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1519-768x512.jpg 768w, https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1519-840x560.jpg 840w, https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1519-120x80.jpg 120w, https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1519-360x240.jpg 360w, https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1519-600x400.jpg 600w\" sizes=\"auto, (max-width: 584px) 100vw, 584px\" \/><\/a>\n\t\t\t<\/dt><\/dl><dl class='gallery-item'>\n\t\t\t<dt class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1520.jpg'><img loading=\"lazy\" decoding=\"async\" width=\"584\" height=\"390\" src=\"https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1520-1024x683.jpg\" class=\"attachment-large size-large\" alt=\"\" srcset=\"https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1520-1024x683.jpg 1024w, https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1520-300x200.jpg 300w, https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1520-768x512.jpg 768w, https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1520-840x560.jpg 840w, https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1520-120x80.jpg 120w, https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1520-360x240.jpg 360w, https:\/\/wonghoi.humgar.com\/blog\/wp-content\/uploads\/2019\/03\/DSC_1520-600x400.jpg 600w\" sizes=\"auto, (max-width: 584px) 100vw, 584px\" \/><\/a>\n\t\t\t<\/dt><\/dl><br style=\"clear: both\" \/>\n\t\t<\/div>\n\n<p>The weak metal strip retainers gave in and the whole rotary encoder is about to break loose! <strong>The encoder was actually still functioning <\/strong>before I opened the case up<strong>.<\/strong> So HP assumed their vendor for the mechanical rotary encoder did a good job withstanding frequent wiggling. Apparently their vendor completely failed them: the metal retainer design was hopelessly flimsy that I wouldn&#8217;t even consider using it even in light-usage applications! FAIL!<\/p>\n<p>There&#8217;s a huge number of these high quality power supplies on the market because Motorola\/Nokia closed down their massive operations, flooding the market with 6632Bs for years to come.<\/p>\n<p>I&#8217;ll now strengthen (I came up with a solid technique to make sure the dial will never fall apart again) the 6632Bs I have for sale to businesses that needs a perfect unit (which I sell for $699\/ea). If you are a hobbyist, feel free to send me a message and I&#8217;ll tell you how to do it, provided that you do not share it with anybody else (I&#8217;ll trust you). If you are a business, I can restore 6630B series to a professionally salable state starting at $499.<\/p>\n<hr \/>\n<p>* Note that I included 66332A despite it&#8217;s a mobile communication DC source (66300 series) here because the guts of it is actually 6630 series. Every other 66300 series (3 Amps max) or less has a different form factor (that&#8217;s more like a 33120A) and the only odd one out of the series is 6632A (5 Amps max).<\/p>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_1518\" class=\"pvc_stats all  \" data-element-id=\"1518\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/wonghoi.humgar.com\/blog\/wp-content\/plugins\/page-views-count\/ajax-loader-2x.gif\" border=0 \/><\/p>\n<div class=\"pvc_clear\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>6630 series system power supply is sturdy as a rock, but has a rotary encoder sticking out that it&#8217;s almost guaranteed to wobble if you buy it used. I thought they would have known better to secure the rotary encoder &hellip; <a href=\"https:\/\/wonghoi.humgar.com\/blog\/2019\/03\/15\/wobbling-rotary-encoder-in-agilent-hp-keysight-6630b-series\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_1518\" class=\"pvc_stats all  \" data-element-id=\"1518\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/wonghoi.humgar.com\/blog\/wp-content\/plugins\/page-views-count\/ajax-loader-2x.gif\" border=0 \/><\/p>\n<div class=\"pvc_clear\"><\/div>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[18,11],"tags":[],"class_list":["post-1518","post","type-post","status-publish","format-standard","hentry","category-electronics","category-measurement-equipment"],"_links":{"self":[{"href":"https:\/\/wonghoi.humgar.com\/blog\/wp-json\/wp\/v2\/posts\/1518","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wonghoi.humgar.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wonghoi.humgar.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wonghoi.humgar.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wonghoi.humgar.com\/blog\/wp-json\/wp\/v2\/comments?post=1518"}],"version-history":[{"count":9,"href":"https:\/\/wonghoi.humgar.com\/blog\/wp-json\/wp\/v2\/posts\/1518\/revisions"}],"predecessor-version":[{"id":1544,"href":"https:\/\/wonghoi.humgar.com\/blog\/wp-json\/wp\/v2\/posts\/1518\/revisions\/1544"}],"wp:attachment":[{"href":"https:\/\/wonghoi.humgar.com\/blog\/wp-json\/wp\/v2\/media?parent=1518"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wonghoi.humgar.com\/blog\/wp-json\/wp\/v2\/categories?post=1518"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wonghoi.humgar.com\/blog\/wp-json\/wp\/v2\/tags?post=1518"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}