From: W. Trevor King Date: Mon, 7 Jul 2008 22:54:09 +0000 (+0000) Subject: Importing NanoBlogger post "Grr Multimodes" X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=2cec86a6ba090fd7679fae087734c41b4ec3fae2;p=blog.git Importing NanoBlogger post "Grr Multimodes" --- diff --git a/posts/Grr_Multimodes.mdwn b/posts/Grr_Multimodes.mdwn new file mode 100644 index 0000000..0508c49 --- /dev/null +++ b/posts/Grr_Multimodes.mdwn @@ -0,0 +1,26 @@ +[[!meta title="Grr Multimodes"]] +[[!meta date="2008-07-07 18:54:09"]] +There was some trouble with tapping-mode imaging this morning, and with Prof. +Yang's help things seem to be straightened out now. I tried both Nanoscopes +with both Multimodes (we have two *nominally* identical systems), but had not +bothered to swap heads. As it turned out, we had been using the infrared head +(we have three heads), which wasn't working. Not that that was the only +problem. As it turned out, tapping seems to be working with the combination +
+  Nanoscope 2 -- Multimode 1 -- Head 1 or 2
+
+ +As far as I can tell, the problem is generating the voltage for the piezo that +vibrates the cantilever, which seems to take place +[on the Multimode main board](http://www.physics.drexel.edu/~wking/rsrch/multimode/internals.shtml). Unless +something is seriously wrong with the Nanoscope, it shouldn't matter which +Nanoscope we use. I suppose I should trace the Nanoscope-Multimode +communication in both cases and look for something different. + +I've no idea how generating a tunable sine wave can be so complicated. The +simple solution is to stick to *modular* equipment with open-standard, +easily-accessible communication between them, but I don't have time to develop +a system like that. Some day I will give up on Nanoscope troubleshooting and +build a [GXSM system](http://gxsm.sourceforge.net/). + +[[!tag hardware]]