X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from host.roblinphoto.com ([72.52.218.78] verified) by logan.com (CommuniGate Pro SMTP 5.2.8) with ESMTPS id 3197379 for flyrotary@lancaironline.net; Thu, 02 Oct 2008 21:24:03 -0400 Received-SPF: pass receiver=logan.com; client-ip=72.52.218.78; envelope-from=bob@bob-white.com Received: from c-68-35-160-229.hsd1.nm.comcast.net ([68.35.160.229]:58908 helo=quail) by host.roblinphoto.com with esmtpa (Exim 4.69) (envelope-from ) id 1KlZOB-0002VF-Q6 for flyrotary@lancaironline.net; Thu, 02 Oct 2008 19:23:28 -0600 Date: Thu, 2 Oct 2008 19:17:43 -0600 From: Bob White To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Coil trigger signal Message-Id: <20081002191743.9d4e5920.bob@bob-white.com> In-Reply-To: References: X-Mailer: Sylpheed 2.6.0beta1 (GTK+ 2.12.0; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - host.roblinphoto.com X-AntiAbuse: Original Domain - lancaironline.net X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - bob-white.com Thanks Mark, but that's the input signal to the computer. I was asking about the output signal that fires the coil. I think Richard has confirmed what I thought the amplitude was. The pulse width won't matter too much since the tach has an internal one shot that drive the meter. Bob W. On Thu, 2 Oct 2008 19:45:51 -0500 "Mark Steitle" wrote: > Bob, > > The Renesis repair manual shows a picture of the signal in the CAS section. > It looks like a stretched out spring with two of coils stretched more than > the rest, followed by more short sections and finally another stretched > section of one coil. There are 13 narrow coils followed by two stretched > coils, then 12 narrow coils followed by one stretched section, then three > narrow coils. Below is my lame attempt to illustrate what it should look > like. > > /\/\/\/\/\/\/\/\/\/\/\/\/\J\J\/\/\/\/\/\/\/\/\/\/\/\/\J\/\/\/\ > > You really ought to get hold of a Renesis shop manual. > > Mark S. > > > On Thu, Oct 2, 2008 at 7:23 PM, Richard Sohn wrote: > > > Bob, > > > > the coil trigger signal is supposed to be a square pulse of 5V amplitude > > and 2ms duration. I used this on the single rotor at one time, and it worked > > great. > > FWIW. > > > > Richard Sohn > > N2071U > > > > ----- Original Message ----- From: "Bob White" > > To: "Rotary motors in aircraft" > > Sent: Thursday, October 02, 2008 3:39 PM > > Subject: [FlyRotary] Coil trigger signal > > > > > > Tracy is on vacation for a while and I need to find out what the coil > >> trigger pulse signal looks like. Anyone know? > >> > >> This is in reference to recalibrating John Downing's tachometer. I > >> will publish what I've done as soon as I have it working. > >> > >> Bob W. > >> > >> -- > >> N93BD - Rotary Powered BD-4 - http://www.bob-white.com > >> 3.8 Hours Total Time and holding > >> Cables for your rotary installation - http://roblinstores.com/cables/ > >> > >> -- > >> Homepage: http://www.flyrotary.com/ > >> Archive and UnSub: > >> http://mail.lancaironline.net:81/lists/flyrotary/List.html > >> > > > > > > > > -------------------------------------------------------------------------------- > > > > > > > > No virus found in this incoming message. > > Checked by AVG - http://www.avg.com > > Version: 8.0.173 / Virus Database: 270.7.5/1703 - Release Date: 10/2/2008 > > 7:46 AM > > > > > > -- > > Homepage: http://www.flyrotary.com/ > > Archive and UnSub: > > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > > -- N93BD - Rotary Powered BD-4 - http://www.bob-white.com 3.8 Hours Total Time and holding Cables for your rotary installation - http://roblinstores.com/cables/