On Fri, 31 Jul 2009, Gerhard Pircher wrote:
Date: Fri, 31 Jul 2009 21:52:30 +0200
From: Gerhard Pircher <gerhard_pirc...@gmx.net>
Reply-To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
To: emc-users@lists.sourceforge.net
Subject: [Emc-users] Mesa 7i33 encoder inputs and up/down counter mode
Hi,
I'm using the Mesa 7i33 card to interface three RS-422 linear encoders to
EMC2. Now I would like to use the fourth input for the spindle speed
sensor, which delivers a 12V pulse and direction signal. But I wonder which
input of the 7i33 card should be connected to the pulse resp. direction
signal (if possible at all, but the Hostmot2 driver allows to run encoders
in counter mode).
BTW I think I have to implement a level shifter to convert the 12V sensor
signals to TTL levels. Or can I misuse the RS-422 receivers for this?
I would just divide the 12V signal down to TTL levels first.
Note: Thats all you should have to do, the so called up/down mode of the
encoder counter _is_ what EMC calls step&dir for outputs. When a HM2 encoder
counter is in up/down mode, Encoder input A is "Step" and encoder input B is
"Dir".
If this encoder counter mode is called Step&Dir by EMC then the HM2
documentation ( and my regmap file) should be changed...
Thanks!
regards,
Gerhard
--
GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT!
Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01
------------------------------------------------------------------------------
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day
trial. Simplify your report design, integration and deployment - and focus on
what you do best, core application coding. Discover what's new with
Crystal Reports now. http://p.sf.net/sfu/bobj-july
_______________________________________________
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
Peter Wallace
Mesa Electronics
(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.
------------------------------------------------------------------------------
Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day
trial. Simplify your report design, integration and deployment - and focus on
what you do best, core application coding. Discover what's new with
Crystal Reports now. http://p.sf.net/sfu/bobj-july
_______________________________________________
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
