From dalyx at snf.stanford.edu Thu Apr 9 09:28:24 2009 From: dalyx at snf.stanford.edu (dalyx at snf.stanford.edu) Date: Thu, 9 Apr 2009 09:28:24 -0700 Subject: Comment sem4160 SNF 2009-04-09 09:28:23: current dropping monotonically... Message-ID: Seems like the current drops over time. Used 20keV, was getting 12uA at first, but then drops monotonically until 8uA. Flashing didn't seem to solve the problem, however setting Vacc again resets the current to higher values. From rostam at snf.stanford.edu Mon Apr 20 22:14:24 2009 From: rostam at snf.stanford.edu (rostam at snf.stanford.edu) Date: Mon, 20 Apr 2009 22:14:24 -0700 Subject: Problem sem4160 SNF 2009-04-20 22:14:23: can't see anything Message-ID: after inserting the sample and closing the valve, there was a hissing sound. I unloded the sample and loaded again the hissing sound stopped. However, I couldn't see anything. even at highest brightness the image is completely dark. From tberg at snf.stanford.edu Tue Apr 21 07:50:42 2009 From: tberg at snf.stanford.edu (tberg at snf.stanford.edu) Date: Tue, 21 Apr 2009 07:50:42 -0700 Subject: Problem sem4160 SNF 2009-04-20 22:14:23: can't see anything Message-ID: Loaded sample holder and was able to see image From jwc at snf.stanford.edu Tue Apr 21 15:37:43 2009 From: jwc at snf.stanford.edu (jwc at snf.stanford.edu) Date: Tue, 21 Apr 2009 15:37:43 -0700 Subject: Comment sem4160 SNF 2009-04-09 09:28:23: current dropping monotonically... Message-ID: normal FE-Gun behaviour with extended Operations. simply flash the tip JWC From jwc at snf.stanford.edu Tue Apr 21 15:37:57 2009 From: jwc at snf.stanford.edu (jwc at snf.stanford.edu) Date: Tue, 21 Apr 2009 15:37:57 -0700 Subject: Comment sem4160 SNF 2009-03-25 02:23:16: Case of the disappearing wrench! Message-ID: recovered From jwc at snf.stanford.edu Tue Apr 21 15:38:18 2009 From: jwc at snf.stanford.edu (jwc at snf.stanford.edu) Date: Tue, 21 Apr 2009 15:38:18 -0700 Subject: Comment sem4160 SNF 2009-02-24 14:08:28: Missing allen key Message-ID: recovered fell through the floor and found it during a dust bunny search From jwc at snf.stanford.edu Tue Apr 21 15:38:29 2009 From: jwc at snf.stanford.edu (jwc at snf.stanford.edu) Date: Tue, 21 Apr 2009 15:38:29 -0700 Subject: Comment sem4160 SNF 2009-01-30 15:19:46: Smallest allan key missing Message-ID: archived From rostam at snf.stanford.edu Thu Apr 23 20:16:04 2009 From: rostam at snf.stanford.edu (rostam at snf.stanford.edu) Date: Thu, 23 Apr 2009 20:16:04 -0700 Subject: Problem sem4160 SNF 2009-04-23 20:16:03: image moving Message-ID: The image on the monitor is moving/shifting to the right constantly From jwc at snf.stanford.edu Fri Apr 24 08:57:09 2009 From: jwc at snf.stanford.edu (James Conway) Date: Fri, 24 Apr 2009 08:57:09 -0700 Subject: Problem sem4160 SNF 2009-04-23 20:16:03: image moving Message-ID: <49F1E155.1040601@snf.stanford.edu> Good Morning Users: If you are not slow, gentle, and kind in your translations of this older SEM stage it will induce backlash and binding of the sliders that control the X-Y axis. It is recommended for smooth uniform motion and not to have tension resulting in shifting of your image to initially start the motion very slowly and then once you observe motion only then accelerate to speed. Subsequently if you still see the stage moving in small increments just gently move back and forth a very small amount on that axis to remove the tension... This is very common practice in the older Hitachi and other SEM manufactured during that era. If you still have problems please make an appointment with me. The next time we open the Specimen Chamber to air for maintenance we will check the stage motion out and adjust the mechanical adjustments on this stage. Thank you for you Coral Problem report. James Conway rostam at snf.stanford.edu wrote: > The image on the monitor is moving/shifting to the right constantly > > -------------- next part -------------- An HTML attachment was scrubbed... URL: From jwc at snf.stanford.edu Wed Apr 29 10:40:02 2009 From: jwc at snf.stanford.edu (jwc at snf.stanford.edu) Date: Wed, 29 Apr 2009 10:40:02 -0700 Subject: Problem sem4160 SNF 2009-04-23 20:16:03: image moving Message-ID: From ahryciw at snf.stanford.edu Wed Apr 29 14:49:12 2009 From: ahryciw at snf.stanford.edu (ahryciw at snf.stanford.edu) Date: Wed, 29 Apr 2009 14:49:12 -0700 Subject: Comment sem4160 SNF 2009-04-29 14:49:11: Very bad vibration and SEC hiss Message-ID: There was more vibration than usual today, resulting in an essentially unusable image at high mag and slow scan speed (even with good focus, stigmation, and alignment). Also, the SEC valve pneumatics hiss often when the valve is being closed. After moving the stage in and out of the SEC a few times, opening and closing the valve each time, I finally got it to stop hissing with the valve closed and the stage in the exchange position. This procedure had to be repeated upon removing the specimens (i.e. to get stage in SEC with valve closed and no hiss). From grahamab at snf.stanford.edu Wed Apr 29 19:58:11 2009 From: grahamab at snf.stanford.edu (grahamab at snf.stanford.edu) Date: Wed, 29 Apr 2009 19:58:11 -0700 Subject: Problem sem4160 SNF 2009-04-29 19:58:10: SEC door won't close when stage is pulled out Message-ID: SEC door closes fine when stage is moved in, but won't close once pulled out. 100% positive transfer rod is fully engaged and stage was in LCK position. worked fine on first attempt but not once sample was put in again. sample is still in the chamber and can be thrown away when recovered. also, image seemed very wobbly when imaging the first case. not sure why. From jwpchen at snf.stanford.edu Thu Apr 30 02:27:10 2009 From: jwpchen at snf.stanford.edu (jwpchen at snf.stanford.edu) Date: Thu, 30 Apr 2009 02:27:10 -0700 Subject: Comment sem4160 SNF 2009-04-30 02:27:09: SEC door won't open Message-ID: Tried putting stage back in LCK and transfer rod to unload stop a few times, but still no response from the SEC valve switch. Sample holder is empty though, so maybe a previous user got grahamab's sample out? From tberg at snf.stanford.edu Thu Apr 30 07:37:26 2009 From: tberg at snf.stanford.edu (tberg at snf.stanford.edu) Date: Thu, 30 Apr 2009 07:37:26 -0700 Subject: Problem sem4160 SNF 2009-04-29 19:58:10: SEC door won't close when stage is pulled out Message-ID: adjusted doo switch and put a nut on it to hopefully prevent movement checked operation fine From tberg at snf.stanford.edu Thu Apr 30 07:38:00 2009 From: tberg at snf.stanford.edu (tberg at snf.stanford.edu) Date: Thu, 30 Apr 2009 07:38:00 -0700 Subject: Comment sem4160 SNF 2009-04-30 02:27:09: SEC door won't open Message-ID: adjusted switch