Stuart Stevenson wrote:
> Gentlemen,
>     Has there been a good procedure developed for starting in the
> middle of a program?
This is too well hidden.  Assuming you are using the Axis GUI, 
you scroll down to the line you want to start from, using the 
mouse buttons on the G-code window.  You click to highlight that 
line, and then in the File pull down (I think) is a "start from 
line" entry.  Click on that, then hit "r" and it will run 
quickly through the code to get to the right position and modes 
at the beginning of the selected block.  BUT, it won't start the 
spindle!  If you don't have a manual spindle override, you are 
pretty sunk until this BUG is fixed.  Starting the spindle with 
F9 and then doing the Run will just turn the spindle off.

Please excuse, I'm going into <rant on>
Clearly, the spindle is a modal operation, just like G41 or G17, 
and so if the G-code starts the spindle in the first couple 
lines, it should be running when the line to start from is 
performed.  In all machining operations, you'd want the spindle 
to be started before beginning a cutting operation.  If somebody 
used M03 and M05 to turn a plasma cutter or laser on and off, 
then these would be scattered all through the code, and 
presumably the operator would know to start on a line where the 
device was off.  This all combines with spindle speed, and maybe 
even gear changes, so it might get a bit more complex.  But, 
these are clearly modal functions, and so if you are preserving 
the state of all the other modal settings, spindle on/off and 
speed should be handled as well.
<rant off>

Jon

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