Kirk Wallace wrote:
> I need to have a collet open and close code (M21/M22 ?) for my Hardinge
> HNC project. I noticed in the Tool Change literature, that changes where
> needed in iosh and tkio.sh . I would also think that changes would be
> needed in the interpreter to add M21/M22. Another issue that comes to
> mind is, can I incorporate conditions to the I/O actions, such as check
> the status of the main air pressure switch to ensure proper grip
> strength? I did a search on the wiki, but I didn't find much on the
> subject. If there are any other links I should study, please let me
> know. Thanks
You could wire an air pressure switch that opens on low pressure 
in series with the E-stop buttons.

Jon

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