From jasonlin at stanford.edu Wed Jul 6 18:02:13 2011 From: jasonlin at stanford.edu (J. Jason Lin) Date: Wed, 6 Jul 2011 18:02:13 -0700 Subject: No Vacuum on Probes Message-ID: Hello Cascade users, Can the superusers take a look at this problem, or is there something we can do ourselves to fix this? Right now there seems to be only one probe with vacuum. The other 4 move quite a bit when manipulating the probes, making measurements very difficult and probably risking the probes accidentally hitting each other. Thanks, Jason -------------- next part -------------- An HTML attachment was scrubbed... URL: From shott at stanford.edu Fri Jul 8 15:27:33 2011 From: shott at stanford.edu (John Shott) Date: Fri, 08 Jul 2011 15:27:33 -0700 Subject: No Vacuum on Probes In-Reply-To: References: Message-ID: <4E178455.7050303@stanford.edu> Jason: Have you received any response on this? Although I don't have any specific experience with the Cascade system and probes, I've got a bit of experience with vacuum mounted probes in general and have a couple of things that you might look at. In general, the vacuum distribution to probes tends to be low conductance .... that means skinny vacuum lines. As a result, it doesn't take too much to block or partially block the vacuum path. Equally, it doesn't take too much of a leak somewhere near the probes to really degrade the vacuum near that leak. If you have good vacuum to one probe and bad vacuum to the other four, is there anything about the routing and geometry of the vacuum lines that might help you isolate the problem. For example, often there is a left side and a right side of the vacuum distribution. Is the good vacuum on one side and the bad vacuum on another? Is there a kinked or collapsed line that might result in little vacuum on the far end of the kink/collapse? If not all probes are connected, is there a valve or something similar that should be closed that is leaking? I will try to wander in and take a look ... Are the probes numbers so that you can tell me which has good vacuum and which have bad? Thanks, John > Hello Cascade users, > > Can the superusers take a look at this problem, or is there something > we can do ourselves to fix this? Right now there seems to be only one > probe with vacuum. The other 4 move quite a bit when manipulating the > probes, making measurements very difficult and probably risking the > probes accidentally hitting each other. > > Thanks, > Jason From mihir.tendulkar at intermolecular.com Fri Jul 8 15:32:13 2011 From: mihir.tendulkar at intermolecular.com (Mihir Tendulkar) Date: Fri, 8 Jul 2011 15:32:13 -0700 Subject: No Vacuum on Probes In-Reply-To: <4E178455.7050303@stanford.edu> References: <4E178455.7050303@stanford.edu> Message-ID: Debugging the manipulator vacuum, for me, usually went in several stages. 1) Check that the probe station surface is clean; wipe off with IPA 2) Clean the rubber seals underneath each manipulator (IPA wipe) 3) Blow out the yellow vacuum tubes with a gas canister More often than not, these first three steps would solve the problem and restore vacuum to a working capacity. If not, the next step is to open up the Cascade and clean the vacuum manifold. I believe there is one for each side of the Cascade (left/right). -----Original Message----- From: John Shott [mailto:shott at stanford.edu] Sent: Friday, July 08, 2011 3:28 PM To: J. Jason Lin Cc: cascade at snf.stanford.edu Subject: Re: No Vacuum on Probes Jason: Have you received any response on this? Although I don't have any specific experience with the Cascade system and probes, I've got a bit of experience with vacuum mounted probes in general and have a couple of things that you might look at. In general, the vacuum distribution to probes tends to be low conductance .... that means skinny vacuum lines. As a result, it doesn't take too much to block or partially block the vacuum path. Equally, it doesn't take too much of a leak somewhere near the probes to really degrade the vacuum near that leak. If you have good vacuum to one probe and bad vacuum to the other four, is there anything about the routing and geometry of the vacuum lines that might help you isolate the problem. For example, often there is a left side and a right side of the vacuum distribution. Is the good vacuum on one side and the bad vacuum on another? Is there a kinked or collapsed line that might result in little vacuum on the far end of the kink/collapse? If not all probes are connected, is there a valve or something similar that should be closed that is leaking? I will try to wander in and take a look ... Are the probes numbers so that you can tell me which has good vacuum and which have bad? Thanks, John > Hello Cascade users, > > Can the superusers take a look at this problem, or is there something > we can do ourselves to fix this? Right now there seems to be only one > probe with vacuum. The other 4 move quite a bit when manipulating the > probes, making measurements very difficult and probably risking the > probes accidentally hitting each other. > > Thanks, > Jason From sgchong at stanford.edu Tue Jul 19 20:33:19 2011 From: sgchong at stanford.edu (Soogine Chong) Date: Tue, 19 Jul 2011 20:33:19 -0700 (PDT) Subject: Cascade free until 9:30 today Message-ID: <595481470.239823.1311132799319.JavaMail.root@zm07.stanford.edu> Starting later... Don't have access to coral, so my name will still show up on coral from 9. Soogine -- Soogine Chong Stanford University PhD candidate in Electrical Engineering e-mail: sgchong at stanford.edu mobile: +1-650-804-8556 From sgchong at stanford.edu Tue Jul 19 21:49:45 2011 From: sgchong at stanford.edu (Soogine Chong) Date: Tue, 19 Jul 2011 21:49:45 -0700 (PDT) Subject: cascade free tonight 9:30PM - midnight (7/19) Message-ID: <1291833166.241304.1311137385361.JavaMail.root@zm07.stanford.edu> -- Soogine Chong Stanford University PhD candidate in Electrical Engineering e-mail: sgchong at stanford.edu mobile: +1-650-804-8556