From au@ociw.edu Wed Sep 7 14:41:20 2005 Received: from platypus.ociw.edu (platypus [192.91.178.3]) by mailman.ociw.edu (8.12.8/8.12.8) with ESMTP id j87LfKmn011891 for ; Wed, 7 Sep 2005 14:41:20 -0700 Received: from [192.91.178.154] (kenny.ociw.edu [192.91.178.154]) by platypus.ociw.edu with ESMTP id j87LfIk8012634 for ; Wed, 7 Sep 2005 14:41:20 -0700 (PDT) Message-ID: <431F5E79.1080707@ociw.edu> Date: Wed, 07 Sep 2005 14:41:13 -0700 From: Alan Uomoto User-Agent: Mozilla Thunderbird 1.0 (Windows/20041206) X-Accept-Language: en-us, en MIME-Version: 1.0 To: lasercut@mailman.ociw.edu Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: [Lasercut] Slitmasks at Las Campanas mailing list X-BeenThere: lasercut@mailman.ociw.edu X-Mailman-Version: 2.1.1 Precedence: list List-Id: Las Campanas slit mask working group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 07 Sep 2005 21:41:21 -0000 All, John Mulchaey heads a working group to simplify laser-cutting slit masks at Las Campanas. Goals include improved documentation, observer support, and operations support. Use this list (lasercut@mailman.ociw.edu) to discuss these topics as well as any others related to laser cutting slit masks at Las Campanas. This includes equipment maintenance, MMIRS, and the WFCCD conversion to laser cutting. You can change your mailing list options by going to the bottom of http://mailman.ociw.edu/mailman/listinfo/lasercut, inserting your email address (the one this message was sent to), and clicking "Unsubscribe or edit options." At the bottom of the page that appears, click "remind" to get your auto-generated password, which you can then use to change your options. Alan Uomoto From au@ociw.edu Tue Oct 4 13:21:12 2005 Received: from platypus.ociw.edu (platypus [192.91.178.3]) by mailman.ociw.edu (8.12.8/8.12.8) with ESMTP id j94KLCmn023935; Tue, 4 Oct 2005 13:21:12 -0700 Received: from [192.91.178.154] (kenny.ociw.edu [192.91.178.154]) by platypus.ociw.edu with ESMTP id j94KL0sR027110; Tue, 4 Oct 2005 13:21:04 -0700 (PDT) Message-ID: <4342E426.1040403@ociw.edu> Date: Tue, 04 Oct 2005 13:20:54 -0700 From: Alan Uomoto User-Agent: Mozilla Thunderbird 1.0 (Windows/20041206) X-Accept-Language: en-us, en MIME-Version: 1.0 To: magellan@mailman.ociw.edu Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit cc: lcotech@lco.cl cc: lasercut@mailman.ociw.edu Subject: [Lasercut] New method for submitting IMACS SMF files for laser cutting X-BeenThere: lasercut@mailman.ociw.edu X-Mailman-Version: 2.1.1 Precedence: list List-Id: Las Campanas slit mask working group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 04 Oct 2005 20:21:15 -0000 IMACS slitmask users (NOT LDSS users), The following is from John Mulchaey (Chair, slitmask working group): ========== As of October 2005, users must submit their mask files using the LCO on-line Slit Mask Manager (http://www.lco.cl/masks/). For IMACS, it is only necessary to submit the .SMF files created by the task "maskgen". Please do not use any form of compression on the uploaded files. You can monitor the status of your masks using the mask database (http://www.lco.cl/masks/search/). Please remember you must submit your mask files at least 30 days prior to the start of your observing run. ========== The Slit Mask Manager is a browser upload form for .SMF files. A comprehensive user manual is linked on front page. Work is proceeding to include LDSS, WFCCD, MMIRS masks in this system but until that capability is announced, please do not submit non-IMACS masks to the Slit Mask Manager. Alan Uomoto Magellan technical manager From au@ociw.edu Fri Dec 2 16:09:26 2005 Received: from platypus.ociw.edu (platypus [192.91.178.3]) by mailman.ociw.edu (8.12.8/8.12.8) with ESMTP id jB309Qmn021859; Fri, 2 Dec 2005 16:09:26 -0800 Received: from [192.91.178.154] (kenny.ociw.edu [192.91.178.154]) by platypus.ociw.edu with ESMTP id jB309NEs024381; Fri, 2 Dec 2005 16:09:23 -0800 (PST) Message-ID: <4390E22D.7070707@ociw.edu> Date: Fri, 02 Dec 2005 16:09:17 -0800 From: Alan Uomoto User-Agent: Mozilla Thunderbird 1.0 (Windows/20041206) X-Accept-Language: en-us, en MIME-Version: 1.0 To: magellan@mailman.ociw.edu, lasercut@mailman.ociw.edu, LCO Technicians Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: [Lasercut] Laser cutter update X-BeenThere: lasercut@mailman.ociw.edu X-Mailman-Version: 2.1.1 Precedence: list List-Id: Las Campanas slit mask working group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 03 Dec 2005 00:09:27 -0000 To all laser cutter users: Some of you have heard about the failure of the laser cutting machine used to make slit masks for LDSS and IMACS. The short story is that the machine is now working. In more detail: The laser cutter failed in early November 2005. Cut quality had been deteriorating and we were already in the process of planning a tuneup; this accelerated that operation. A PRIMA/Convergent engineer (Mike Valente) was immediately scheduled for a repair trip after the failure. In the meantime, diagnostics were done by on-site staff to prepare for the repair work. It was found that the spatial filter was damaged. Unfortunately, a power meter needed for the replacement was not available (the one purchased with the machine was not up to this task) so the damaged spatial filter was removed. The spatial filter is a small pinhole that masks wide field light to clean up the cutting beam. Removing the filter slightly increased the width of the cut (kerf) from 0.0030 to 0.0035 inches (these are estimates). We have ordered a new power meter for the laser system and plan to install a new spatial filter in the future. The LCO staff helped out tremendously by doing the laser diagnostics, arranging last minute transportation and housing for Mike Valente, and doing overtime slit mask cutting to catch up on the schedule (Oscar, Gaston, Patricio, Frank, Marc, Dave, Patricia, Jorge; did I forget anybody?). We also thank SBS staff (Jeanette) for quickly handling and pushing the repair order. Alan Uomoto From au@ociw.edu Wed Mar 1 09:41:07 2006 Received: from platypus.ociw.edu (platypus [192.91.178.3]) by mailman.ociw.edu (8.12.8/8.12.8) with ESMTP id k21Hf7mn010715 for ; Wed, 1 Mar 2006 09:41:07 -0800 Received: from [192.91.178.154] (kenny.ociw.edu [192.91.178.154]) by platypus.ociw.edu with ESMTP id k21Heu3f021324; Wed, 1 Mar 2006 09:40:56 -0800 (PST) Message-ID: <4405DCA3.9020809@ociw.edu> Date: Wed, 01 Mar 2006 09:40:51 -0800 From: Alan Uomoto User-Agent: Mozilla Thunderbird 1.0 (Windows/20041206) X-Accept-Language: en-us, en MIME-Version: 1.0 To: lasercut@mailman.ociw.edu Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit cc: Jeff Julian Subject: [Lasercut] Cutting thin aluminum slit masks (MMIRS & WFCCD) on a copper base X-BeenThere: lasercut@mailman.ociw.edu X-Mailman-Version: 2.1.1 Precedence: list List-Id: Las Campanas slit mask working group List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 01 Mar 2006 17:41:08 -0000 I talked with Michael Valente, who represents our laser manufacturer, a couple of weeks ago and he mentioned that our laser does not cut copper. I asked if using a flat copper base to hold our anodized aluminum foil masks with, say, a vacuum would work and he sounded optimistic. The example he was familiar with was cutting away photoresist from a copper-clad board. I've asked Tyson to start working on a setup to test this procedure. Alan