From elvislin at snf.stanford.edu Wed Jan 7 14:29:40 2009 From: elvislin at snf.stanford.edu (elvislin at snf.stanford.edu) Date: Wed, 7 Jan 2009 14:29:40 -0800 Subject: Problem wafersaw SNF 2009-01-07 14:29:39: machine frozen Message-ID: machine frozen during height calibration. now the machine thinks the "stop" switch is on no mater what you do. machine not usable in the current state. From eenriquez at snf.stanford.edu Thu Jan 8 11:08:07 2009 From: eenriquez at snf.stanford.edu (eenriquez at snf.stanford.edu) Date: Thu, 8 Jan 2009 11:08:07 -0800 Subject: Problem wafersaw SNF 2009-01-07 14:29:39: machine frozen Message-ID: The "Stop" switch contact was dirty. Actuated the switch several times and it seem to have cleaned up the contact. If the problem reoccurs, we will replace the switch. From chen0622 at snf.stanford.edu Mon Jan 12 11:01:07 2009 From: chen0622 at snf.stanford.edu (chen0622 at snf.stanford.edu) Date: Mon, 12 Jan 2009 11:01:07 -0800 Subject: Problem wafersaw SNF 2009-01-12 11:01:06: The caliper for wafer thickness measurement is not working. Message-ID: It may need a new battery. From kenney at snf.stanford.edu Tue Jan 13 13:11:53 2009 From: kenney at snf.stanford.edu (kenney at snf.stanford.edu) Date: Tue, 13 Jan 2009 13:11:53 -0800 Subject: Problem wafersaw SNF 2009-01-13 13:11:52: Leak Message-ID: There seems to be a water leak. A puddle has formed on the right side of the saw ands appears to originate from underneath the saw platform. Thanks From mtang at snf.stanford.edu Wed Jan 14 11:39:13 2009 From: mtang at snf.stanford.edu (mtang at snf.stanford.edu) Date: Wed, 14 Jan 2009 11:39:13 -0800 Subject: Problem wafersaw SNF 2009-01-14 11:39:13: Low N2? Message-ID: The system would not start because of low air, although you can clearly hear it and the incoming pressure is good. The side panel was still off, since work on the slight leak continues. A regulator was sticking out -- wiggling the regulator line causes this low air error to go off and on. Since Prabhu really wants to use it, we gently placed it so that it stays on. But the plan is to put this down when he is done. From kenney at snf.stanford.edu Thu Jan 15 18:15:09 2009 From: kenney at snf.stanford.edu (kenney at snf.stanford.edu) Date: Thu, 15 Jan 2009 18:15:09 -0800 Subject: Problem wafersaw SNF 2009-01-15 18:15:08: STOP button flaky? Message-ID: Sometimes the STOP switch briefly turns on either without being touched or by just brushing against it. From gsosa at snf.stanford.edu Sat Jan 17 17:55:23 2009 From: gsosa at snf.stanford.edu (gsosa at snf.stanford.edu) Date: Sat, 17 Jan 2009 17:55:23 -0800 Subject: Problem wafersaw SNF 2009-01-17 17:55:22: Water leak Message-ID: Water from the water gun hose was spraying all over the saw room, up and over and on top of CMP tool. Pinched off the water line by doubling over to pinch hose and secured with a tie wrap. Also pinched off with vise grips for added protection. Cleaned up most of the water on the floor. Still needs some additional cleanup underneath the tools and on top and inside of CMP. Only pinched off water line to water gun. Did not shut down system. Do not know if users are using the saw without the water gun. From eenriquez at snf.stanford.edu Mon Jan 26 08:21:14 2009 From: eenriquez at snf.stanford.edu (eenriquez at snf.stanford.edu) Date: Mon, 26 Jan 2009 08:21:14 -0800 Subject: Problem wafersaw SNF 2009-01-17 17:55:22: Water leak Message-ID: Replaced the leaky fitting on the water gun and installed an inline shut-off valve. Please leave the valve in the off position after using the water gun. From eenriquez at snf.stanford.edu Mon Jan 26 08:21:23 2009 From: eenriquez at snf.stanford.edu (eenriquez at snf.stanford.edu) Date: Mon, 26 Jan 2009 08:21:23 -0800 Subject: Problem wafersaw SNF 2008-12-08 08:52:15: No water sray gun Message-ID: Replaced the leaky fitting on the water gun and installed an inline shut-off valve. Please leave the valve in the off position after using the water gun. From eenriquez at snf.stanford.edu Mon Jan 26 08:22:07 2009 From: eenriquez at snf.stanford.edu (eenriquez at snf.stanford.edu) Date: Mon, 26 Jan 2009 08:22:07 -0800 Subject: Comment wafersaw SNF 2008-12-08 09:03:10: Water squirt bottle Message-ID: Water spray gun is back in service. From eenriquez at snf.stanford.edu Mon Jan 26 08:22:28 2009 From: eenriquez at snf.stanford.edu (eenriquez at snf.stanford.edu) Date: Mon, 26 Jan 2009 08:22:28 -0800 Subject: Problem wafersaw SNF 2009-01-12 11:01:06: The caliper for wafer thickness measurement is not working. Message-ID: Battery has been replaced. From chen0622 at snf.stanford.edu Mon Jan 26 16:24:46 2009 From: chen0622 at snf.stanford.edu (chen0622 at snf.stanford.edu) Date: Mon, 26 Jan 2009 16:24:46 -0800 Subject: Problem wafersaw SNF 2009-01-26 16:24:45: low air pressure Message-ID: Low air pressure error coming out several times during operation. From shott at snf.stanford.edu Mon Jan 26 16:52:30 2009 From: shott at snf.stanford.edu (shott at snf.stanford.edu) Date: Mon, 26 Jan 2009 16:52:30 -0800 Subject: Problem wafersaw SNF 2009-01-26 16:24:45: low air pressure Message-ID: chen0622 asked me about the low Nitrogen problem. When I looked at the switch, I realized that the black wire wasn't actually being held in place but was simply sitting against the contact. I believe that everytime that the saw vibrates (like when returning to home or at the end of a cut) the low Nitrogen condition may happen. In any event, I've resecured this wire and is is undergoing testing at the moment. Does anyone know where the cover to this switch is? Thanks, John From shott at snf.stanford.edu Mon Jan 26 16:52:56 2009 From: shott at snf.stanford.edu (shott at snf.stanford.edu) Date: Mon, 26 Jan 2009 16:52:56 -0800 Subject: Problem wafersaw SNF 2009-01-14 11:39:13: Low N2? Message-ID: chen0622 asked me about the low Nitrogen problem. When I looked at the switch, I realized that the black wire wasn't actually being held in place but was simply sitting against the contact. I believe that everytime that the saw vibrates (like when returning to home or at the end of a cut) the low Nitrogen condition may happen. In any event, I've resecured this wire and is is undergoing testing at the moment. Does anyone know where the cover to this switch is? Thanks, John From yeh at snf.stanford.edu Wed Jan 28 13:43:34 2009 From: yeh at snf.stanford.edu (yeh at snf.stanford.edu) Date: Wed, 28 Jan 2009 13:43:34 -0800 Subject: Problem wafersaw SNF 2009-01-28 13:43:33: caliper missing Message-ID: From yeh at snf.stanford.edu Wed Jan 28 13:45:04 2009 From: yeh at snf.stanford.edu (yeh at snf.stanford.edu) Date: Wed, 28 Jan 2009 13:45:04 -0800 Subject: Problem wafersaw SNF 2009-01-28 13:45:03: stop button faulty Message-ID: stop is "ON" at up and down positions. stop is only "OK" part way depressed. had to tape down to operate tool.