From cbaxter at snf.stanford.edu Thu Jun 1 13:27:48 2006 From: cbaxter at snf.stanford.edu (cbaxter at snf.stanford.edu) Date: Thu, 1 Jun 2006 13:27:48 -0700 Subject: Shutdown wafersaw SNF 2006-05-31 17:53:14: Left Limit Switch Triggered on Unload Message-ID: Mary, tested the tool and seem to working fine. Will keep the tool on yellow light till we find the fix to the intermitten problem with x axis error. From tskim1 at snf.stanford.edu Thu Jun 1 14:50:59 2006 From: tskim1 at snf.stanford.edu (tskim1 at snf.stanford.edu) Date: Thu, 1 Jun 2006 14:50:59 -0700 Subject: Problem wafersaw SNF 2006-06-01 14:50:53: X-axis problem again! Message-ID: I had the same x-axis problem and the wafersaw didn't work again. From tskim1 at snf.stanford.edu Thu Jun 1 15:05:25 2006 From: tskim1 at snf.stanford.edu (tskim1 at snf.stanford.edu) Date: Thu, 1 Jun 2006 15:05:25 -0700 Subject: Shutdown wafersaw SNF 2006-06-01 15:05:12: X-axis problem again. Message-ID: I think the wafersaw should be shut down untill it is fixed completely. From cbaxter at snf.stanford.edu Thu Jun 1 16:52:12 2006 From: cbaxter at snf.stanford.edu (cbaxter at snf.stanford.edu) Date: Thu, 1 Jun 2006 16:52:12 -0700 Subject: Shutdown wafersaw SNF 2006-06-01 15:05:12: X-axis problem again. Message-ID: From sjo at snf.stanford.edu Thu Jun 1 20:23:20 2006 From: sjo at snf.stanford.edu (sjo at snf.stanford.edu) Date: Thu, 1 Jun 2006 20:23:20 -0700 Subject: Comment wafersaw SNF 2006-06-01 20:23:20: Works o.k., but index toggle switch broken Message-ID: The wafersaw worked o.k. for me, but there are 3 items that probably need to be taken care of: 1.) The index toggle switch (between the X and Y dials) is visibly broken, it only works in one direction, and it gets stuck easily, advancing the Y axis all the way to the rear limit. 2.) Even though I did not have problems with the X axis left limit switch, I notice that the unload position is very close to the left X-axis limit. Setting the limit and the unload position a bit (a mm or so) farther apart would probably make it operate more reliably. This can probably be done by changing the unload position in software, or maybe by mechanically adjusting the limit trigger to allow the tray a millimeter of additional leftwards travel. 3.) The emergency stop button needs a new light bulb. Otherwise, as I said, seems to work well. From mtang at snf.stanford.edu Tue Jun 6 14:25:50 2006 From: mtang at snf.stanford.edu (mtang at snf.stanford.edu) Date: Tue, 6 Jun 2006 14:25:50 -0700 Subject: Shutdown wafersaw SNF 2006-06-06 14:25:49: Repair expert is here Message-ID: From eenriquez at snf.stanford.edu Wed Jun 7 00:37:05 2006 From: eenriquez at snf.stanford.edu (eenriquez at snf.stanford.edu) Date: Wed, 7 Jun 2006 00:37:05 -0700 Subject: Shutdown wafersaw SNF 2006-06-06 14:25:49: Repair expert is here Message-ID: Adjusted the x-axis limit switch. Adjusted/ verified axis controller timing signals. Replaced indexer switch. From eenriquez at snf.stanford.edu Wed Jun 7 00:38:38 2006 From: eenriquez at snf.stanford.edu (eenriquez at snf.stanford.edu) Date: Wed, 7 Jun 2006 00:38:38 -0700 Subject: Problem wafersaw SNF 2006-05-31 11:51:34: system seem to be working fine. Message-ID: Problem fixed. From eenriquez at snf.stanford.edu Wed Jun 7 00:39:02 2006 From: eenriquez at snf.stanford.edu (eenriquez at snf.stanford.edu) Date: Wed, 7 Jun 2006 00:39:02 -0700 Subject: Problem wafersaw SNF 2006-06-01 14:50:53: X-axis problem again! Message-ID: Problem fixed by field service From eenriquez at snf.stanford.edu Wed Jun 7 00:39:31 2006 From: eenriquez at snf.stanford.edu (eenriquez at snf.stanford.edu) Date: Wed, 7 Jun 2006 00:39:31 -0700 Subject: Comment wafersaw SNF 2006-06-01 20:23:20: Works o.k., but index toggle switch broken Message-ID: Problems fixed by field service From langrock at snf.stanford.edu Wed Jun 7 15:11:11 2006 From: langrock at snf.stanford.edu (langrock at snf.stanford.edu) Date: Wed, 7 Jun 2006 15:11:11 -0700 Subject: Problem wafersaw SNF 2006-06-07 15:11:11: z calibration, x limit switch Message-ID: neither one works correctly right now ... From eenriquez at snf.stanford.edu Thu Jun 8 00:17:06 2006 From: eenriquez at snf.stanford.edu (eenriquez at snf.stanford.edu) Date: Thu, 8 Jun 2006 00:17:06 -0700 Subject: Problem wafersaw SNF 2006-06-07 15:11:11: z calibration, x limit switch Message-ID: Re-adjusted the x limit switch. Checked chuck parallelism. From mtang at snf.stanford.edu Thu Jun 8 14:11:58 2006 From: mtang at snf.stanford.edu (mtang at snf.stanford.edu) Date: Thu, 8 Jun 2006 14:11:58 -0700 Subject: Problem wafersaw SNF 2006-06-08 14:11:57: Message-ID: From mtang at snf.stanford.edu Thu Jun 8 14:17:54 2006 From: mtang at snf.stanford.edu (mtang at snf.stanford.edu) Date: Thu, 8 Jun 2006 14:17:54 -0700 Subject: Problem wafersaw SNF 2006-06-08 14:17:53: Seems to work! Message-ID: Yesterday, Carston had two problems with the system. First, was the X-axis limit error. Elmer adjusted this. Second, Carston's cut didn't go as deeply as expected. Cesar took a look at this, but I don't think anything was adjusted. It seems to work so far, but we'll keep this in yellow to warn everyone to watch out for these possible concerns. From eenriquez at snf.stanford.edu Thu Jun 8 16:56:00 2006 From: eenriquez at snf.stanford.edu (eenriquez at snf.stanford.edu) Date: Thu, 8 Jun 2006 16:56:00 -0700 Subject: Problem wafersaw SNF 2006-06-08 14:11:57: Message-ID: From mtang at snf.stanford.edu Tue Jun 13 15:31:43 2006 From: mtang at snf.stanford.edu (mtang at snf.stanford.edu) Date: Tue, 13 Jun 2006 15:31:43 -0700 Subject: Problem wafersaw SNF 2006-06-08 14:17:53: Seems to work! Message-ID: There have been no further reported problems with the X-axis limit switch (Elmer's adjustment seems to be working.) And the cut depth concern appears to have been math problem. So, it looks like we're good to go.