On Mon, 4 May 2015, Tom Easterday wrote:
Date: Mon, 4 May 2015 20:07:47 -0400
From: Tom Easterday <[email protected]>
Reply-To: "Enhanced Machine Controller (EMC)"
<[email protected]>
To: Enhanced Machine Controller <[email protected]>
Subject: [Emc-users] what causes stepper motor stall
The manual for the UDX5128NA step parameter is shown below (inline jpeg).
That doesn??t work does it? :-) The UDX5128NA manual is here:
http://bgp.nu/~tom/pub/UDX5128NA-UM.pdf
<http://bgp.nu/~tom/pub/UDX5128NA-UM.pdf>
-Tom
Just to make sure its not a current drive issue, can you try connecting the
step and dir signals to the 7I85S such that the 7I85S sinks current to drive
the OPTO? The current batch of 7I85S's sink current better than source so you
would connect the OPTO + to 5V and OPTO- to 7I85S output to get maximum drive
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Peter Wallace
Mesa Electronics
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