Except that the encoder is not a TTL output encoder but a differential line driver model encoder:
http://www.automationdirect.com/adc/Shopping/Catalog/Sensors_-z-_Encoders/Encoders/Medium_Duty_Standard_Shaft_%28TRD-N_Series%29/TRD-N1024-RZVWD TRD-N1024-RZVWD Brian are you sure this is the correct part number for your encoder? Automation Direct sells a very similar encoder but with single ended TTL outputs. The jumpers on the Mesa card has to correspond to the encoder type (differential line driver or TTL) otherwise nothing will work right. Dave On 6/9/2012 3:08 PM, Peter C. Wallace wrote: > On Sat, 9 Jun 2012, Brian May wrote: > > >> Date: Sat, 9 Jun 2012 12:21:08 -0600 >> From: Brian May<bri...@do-precision.com> >> Reply-To: "Enhanced Machine Controller (EMC)" >> <emc-users@lists.sourceforge.net> >> To: "Enhanced Machine Controller (EMC)"<emc-users@lists.sourceforge.net> >> Subject: Re: [Emc-users] Lathe Threading >> >> Low Level is 220mv >> High Level 3.12 Volts >> > > Well thats valid TTL so OK (as long as the 7I33 inputs are jumpered for TTL > in) > > So the next step in tracing it is is to see if the GPIO for Z bit is visible > in halmeter when you do the same test > > > with a 1024 line encoder you will likely miss the index with HALScope on the > GPIO bit above 60 RPM, so a real scope would really help in case you are > losing the signal above a certain speed > > Peter Wallace > > > ------------------------------------------------------------------------------ > Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. Discussions > will include endpoint security, mobile security and the latest in malware > threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
