step/direction interface

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15 May 2019 04:52 #133811 by Type_Zero_Design
Just to verify, on the 7i76E board it has five channels of step/dir interface.

That includes:
GND
STEP0-
STEP0+
DIR0-
DIR0+
+5vP

In my drive with step/direction control do I use the GND and +5VP? or is that for analog voltage control?

link to drive manual: www.machsupport.com/forum/index.php?acti...34972.0;attach=46261

for reference my drive is SD*08NK0 in the manual


Is this the only absolutely necessary connections between the drive and Mesa card to test the drive?

Thanks!

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15 May 2019 06:48 - 16 May 2019 06:29 #133822 by pl7i92
Replied by pl7i92 on topic step/direction interface
From Manual Correcxt info
Step motor drives with single ended inputs
connect to just one of the STEP and DIR signal outputs, that is either the STEP+/DIR+ or
STEP-/DIR- signals, with the unused signals left unconnected at the 7I76E. The input
common signal on drives with single ended inputs connects to the 7I76Es GND or 5VP
pins depending on the drive type.


the DRIVE is only connected
STEP0-
DIR0-
Comen eighter GND or 5V depends on Driver settings positiv step or Negativ Step
see Datasheet SWITCH may be Internal Driver Brick
Last edit: 16 May 2019 06:29 by pl7i92. Reason: wrong info
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15 May 2019 11:55 - 15 May 2019 11:57 #133830 by Hakan
Replied by Hakan on topic step/direction interface
The four signals go in to pins 6,7,18,19 on CN1. The 7i76e is perfectly suited for this.
That't all you need from mesa. You will not use the +5V and GND.
Last edit: 15 May 2019 11:57 by Hakan. Reason: spleeling
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15 May 2019 21:50 #133924 by Hakan
Replied by Hakan on topic step/direction interface
The drive he points to has differential inputs.
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15 May 2019 22:05 #133925 by Type_Zero_Design
Darkest Hour
I read that about six time in the manual but it didn't really help or make sense to me. What I took away is if you were only using single line step and direction you would somehow use the positive 5 volt and ground somehow.

Thanks for all the answers though

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16 May 2019 05:18 #133946 by Hakan
Replied by Hakan on topic step/direction interface
Ok, it is possible to use single ended. But why use that when it can do differential?

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