Re: [CAD_CAM_EDM_DRO] Re: Bridgeport CNC Mill???

The Haas machines I use on a daily basis don't allow you to jog during feed
hold. However, you can feed hold, then spindle stop. Pressing cycle start
again will restart the spindle and coolant before restarting table motion.
Additionally, if you reset the program, then manually select a line to
start from, the machine will read through and perform any necessary tool
changes, spindle starts, load offsets, etc, necessary to restart without
crashing.

On Thu, Oct 6, 2011 at 21:11, Jon Elson <elson@...> wrote:

> **
>
>
> samcoinc2001 wrote:
> > I agree that would be neat. Really though - I didn't even know I was
> missing it until someone had mentioned it to me.. :) I don't consider it
> 'all but useless'... I stop the machine a lot to make measurements and clear
> swarf. switch on on feed hold -> run spindle override to 0. If I need to
> change something in the middle of a program I use 'Run From Line' to start
> again.
> >
> At least in the version I have, run from line doesn't re-start the
> spindle. There is an option
> to make mode changes (manual <=> Auto <=> MDI) not stop the spindle, and
> I have
> that set. So, I have to start the spindle in MDI, switch to manual and
> then do the run
> from line.
>
> Run from line can also screw up programs with loops pretty badly.
>
> Before EMC(1), I has an Allen-Bradley 7320, a very early CNC control
> with CRT.
> You could hit cycle stop and punch buttons to back up a couple lines in
> the program
> and then start from there. If running from real paper tape, it would
> read the tape
> backwards to re-read the lines as you stepped forward and back. They
> also had a
> "jog retract" button that would allow you to back up one axis even in
> the middle of
> a coordinated move, and it would put it back where it had been to resume
> the move.
> This was on a 1978 control.
>
> Jon
>
>
>


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