Re: [CAD_CAM_EDM_DRO] CNCpro bit states

Hi Rich;

We were discussing how to ensure that the aux outs in CNCpro would be
disabled when exiting the program:

> So, it seems, the last transition is whatever, wherever it was left at

end.

> The I/O's (no I's actually) are another matter and until a program is set

to

> run, it seems to be another case of anybodys guess.

This parallels my findings. Leave the aux outputs on (or off) when you exit
CNCpro and they stay that way until you go back into CNCpro. However, we
can't be guaranteed this will be the case for any computer running any
software. Suppose the operator decides to boot W98, which in turn decides
to rearrange the parallel port.

> I'm thinking of a logic interlock. For spindle "on" stepping bits must be

active

> on any axis before M04/5 will be honored, the normal "good" data case.
>
> Rich D.

I talked to Mariss about this today. He suggested using the handshake bit
of the serial port to disable the aux lines. I am already using octal
tranceivers that require manual enabling on start-up. Simply write a batch
file that fires the handshake line when you exit CNCpro. The handshake can
be tied to the octal tranceivers so as to unlatch the enable pins, thus
killing all outputs.

Doug