On Mon, 29 Apr 2013, RogerN wrote:
Date: Mon, 29 Apr 2013 17:02:50 -0500
From: RogerN <re...@wildblue.net>
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] Mesa Board Configuration
When I converted my Anilam lathe to EMC2, I used the 5i20 + 7i33 + 7i37. If
I understand correctly, the external boards convert the PWM signal from the
5i20 into a +/- 10V signal. I was thinking that the boards produced an
analog output from a PWM signal, not an actual D-A converter. That's why I
thought I needed PWM outputs, the drives themselves take +/- 10V. The
output cards themselves output +/- 10V but I'm guessing the 5i25 doesn't
output +/-10V, my guess it outputs 0-5V pwm. Sorry for the confusion, what
I get from the output card isn't what I need from the interface cards, if it
were I suspect I wouldn't need interface cards, just a breakout board.
RogerN
In the 7I77 case, the data on the pins is actually a serial data stream (Async
serial at 2.5 MBaud)
-----Original Message-----
From: Todd Zuercher
Sent: Monday, April 29, 2013 3:19 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Mesa Board Configuration
The 7i77 is 6 analog out for servo control, I thought you wanted PWM out.
----- Original Message -----
From: Andrew
Sent: Sunday, April 28, 2013 11:55 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Mesa Board Configuration
2013/4/28 RogerN <re...@wildblue.net>
I??m preparing for a conversion of a mill that has servos and encoders.
It
currently has 3 axis but I want to add spindle control. In the future I??d
like to be able to add a rotary axis...
What I??d like is a configuration to allow 8 servos plus some I/O for
limit
and home switches. The configurations I saw listed seemed to have 4
servos
+ I/O or more servos without I/O.
Any recommendations for best solution, 8 encoders, 8 PWM out plus I/O.
In case you don't (and you actually don't) need 8 axes, MESA 5i25 + 7i76 is
a perfect fit with 6 servo axes + 48 I/O.
If you still insist on 8 axes it will be more complicated and much more
expensive: 5i22(or 5i23) + 7I65 (or 2x7i33) + 7i37 or other breakout board.
Andrew
Six axis sounds great to me, I just didn't want to use up all 4 axis using
the spindle and then not have a rotary option in the future.
I didn't see this combination listed on the documentation I have, mine's
probably a bit dated.
RogerN
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Mesa Electronics
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