On Sat, 1 Dec 2018, Thaddeus Waldner wrote:
Date: Sat, 1 Dec 2018 03:52:12 +0000
From: Thaddeus Waldner <[email protected]>
Reply-To: "Enhanced Machine Controller (EMC)"
<[email protected]>
To: "Enhanced Machine Controller (EMC)" <[email protected]>
Subject: [Emc-users] 7i96 step-direction headers
I am using TTL step-direction outputs on the 7i96 I/O board to drive a
Teknic ClearPath motor. With the board set to TTL mode, is it possible to
address the step- and dir- pins. I would like to use one for an enable
output for the motor and the other for the feedback from the motor (input).
Thaddeus Waldner
No, the + and - step and direction pins are inverted copies of the same
signal. You can as Andy suggests limit the number of active stepgens in the
hal file and then use the freed step/dir pins as outputs (they can not be used as
inputs)
You should also be able to use one of the 7I96s isolated outputs to drive the
enable (one output could perhaps drive all enables)
Likewise you should be able to use the isolated inputs for drive feedback
(and if these are used to signal a drive fault you can also parallel them
if they are normally off or series connect then if they are normally on so be
able to use a single input to monitor all drives)
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Peter Wallace
Mesa Electronics
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