From PICLIST@MITVMA.MIT.EDU Fri Nov 15 02:37:50 2002 Received: from cherry.ease.lsoft.com [209.119.0.109] by dpmail10.doteasy.com with ESMTP (SMTPD32-7.13) id AE7E14D00084; Fri, 15 Nov 2002 02:37:50 -0800 Received: from PEAR.EASE.LSOFT.COM (209.119.0.19) by cherry.ease.lsoft.com (LSMTP for Digital Unix v1.1b) with SMTP id <0.007DB621@cherry.ease.lsoft.com>; Fri, 15 Nov 2002 5:23:43 -0500 Received: from MITVMA.MIT.EDU by MITVMA.MIT.EDU (LISTSERV-TCP/IP release 1.8d) with spool id 0520 for PICLIST@MITVMA.MIT.EDU; Fri, 15 Nov 2002 05:23:31 -0500 Received: from MITVMA (NJE origin SMTP@MITVMA) by MITVMA.MIT.EDU (LMail V1.2d/1.8d) with BSMTP id 5951; Fri, 15 Nov 2002 05:21:54 -0500 Received: from nameserv.rl.ac.uk [130.246.135.129] by mitvma.mit.edu (IBM VM SMTP Level 320) via TCP with ESMTP ; Fri, 15 Nov 2002 05:21:53 EST X-Comment: mitvma.mit.edu: Mail was sent by nameserv.rl.ac.uk Received: from sstdwkiwi (sstdwkiwi.ag.rl.ac.uk [130.246.189.231]) by nameserv.rl.ac.uk (8.8.8/8.8.8) with SMTP id KAA27410 for ; Fri, 15 Nov 2002 10:21:53 GMT References: X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4807.1700 X-MIMEOLE: Produced By Microsoft MimeOLE V5.50.4807.1700 Message-ID: <013e01c28c90$d1c2f7b0$e7bdf682@sstdwkiwi> Date: Fri, 15 Nov 2002 10:21:53 -0000 Reply-To: pic microcontroller discussion list Sender: pic microcontroller discussion list From: "Alan B. Pearce" Subject: Re: [EE]: Printer to PCB? To: PICLIST@MITVMA.MIT.EDU X-RCPT-TO: Status: R X-UIDL: 277600625 X-Evolution-Source: pop://mailinglist%40farcite.net@mail.farcite.net/ Mime-Version: 1.0 X-Evolution: 00000749-0000 >I'm not sure the plotter arm is smart enough to know >if it has a pen already loaded in it? Well the arm isn't :) But on my HP7475 it goes through various motions at times to try and grab a pen from the carousel, or put one in it. I suspect it measures arm position and motor current to determine the relative states of arm/carousel empty or occupied. The arm and carousel certainly do a little dance together at various times as pen requests occur. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.