{"id":1346,"date":"2014-09-16T01:15:28","date_gmt":"2014-09-16T01:15:28","guid":{"rendered":"http:\/\/41j.com\/blog\/?p=1346"},"modified":"2015-06-12T11:09:16","modified_gmt":"2015-06-12T11:09:16","slug":"low-cost-stm-projects-a-review","status":"publish","type":"post","link":"https:\/\/41j.com\/blog\/2014\/09\/low-cost-stm-projects-a-review\/","title":{"rendered":"Low cost STM projects – A review"},"content":{"rendered":"

I’ve been reviewing some student\/hacker attempts at building low cost STMs. The major challenge in an STM project appears to be the coarse\/fine grained approach mechanism, and there are a few options. this review<\/a> is also pretty useful.<\/p>\n

Unimorph disc projects<\/h2>\n

\"unimorph_xy\"<\/a><\/p>\n

\"disk_drawing_elec_s\"<\/a><\/p>\n

\"disk_drawing_sidewp\"<\/a><\/p>\n

These projects use a standard Piezo buzzer cut into 4 quadrants. The tip is mounted in the center, the setup seems to produce reasonable (but far from perfect) results. I’ve seen a couple of projects based around this idea. The earliest seems to be John Alexanders project<\/a> which is now only available via the Internet archive.<\/p>\n

The second is a Colorado State University project that was presented at a conference, the paper is linked here:<\/p>\n

2006-2314: A NANOTECHNOLOGY EXPERIMENT: DESIGN OF LOW COST SCANNING TUNNELING MICROSCOPES, Nebojsa Jaksic, Colorado State University-Pueblo: pdf<\/a>local copy<\/a><\/p>\n

This project from the University of Hannover is also similar (nicely done, though light on details): pdf<\/a> local<\/a><\/p>\n

There’s also this project from AFEKA, Tel-Aviv: pdf<\/a> local<\/a><\/p>\n

Another awesome project by some HIGH SCHOOL students Switzerland is also documented here<\/a> they didn’t complete it, but took some measurements. In particular their journal contains a lot of interesting information. (local copy: journal<\/a> paper<\/a>).<\/p>\n

More recently Dan Berard documented a excellent project on his website<\/a> which includes a lot of very useful information.<\/p>\n

Bimorph benders<\/h2>\n

\"bimorphstm\"<\/a><\/p>\n

I’ve come across one project that uses Bimorph benders blackford1987<\/a>. The opamp used is an AD611.<\/p>\n

Piezo Tubes<\/h2>\n

Piezo tubes are used in commercial STMs, but they’re actually not that expensive to buy in small quantities, it just takes a bit of work to hunt out suppliers. There are more details on my Piezo actuator review post<\/a>. This project<\/a> planned to use a Piezo tube and has some great information.<\/p>\n

This paper<\/a>Also uses a piezo tube in a low cost configuration.<\/p>\n

This paper<\/a> is another such project.<\/p>\n

And another: hipps1990<\/a><\/p>\n

Amplifier notes<\/h2>\n

A paper on STM amps: lownoiseamp<\/a><\/p>\n

Here’s another detailed paper on amp design: holt2012<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

I’ve been reviewing some student\/hacker attempts at building low cost STMs. The major challenge in an STM project appears to be the coarse\/fine grained approach mechanism, and there are a few options. this review is also pretty useful. Unimorph disc projects These projects use a standard Piezo buzzer cut into 4 quadrants. The tip is […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1],"tags":[],"class_list":["post-1346","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p1RRoU-lI","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/posts\/1346","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/comments?post=1346"}],"version-history":[{"count":9,"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/posts\/1346\/revisions"}],"predecessor-version":[{"id":2539,"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/posts\/1346\/revisions\/2539"}],"wp:attachment":[{"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/media?parent=1346"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/categories?post=1346"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/41j.com\/blog\/wp-json\/wp\/v2\/tags?post=1346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}