How is that handled currently?

Actually I am more interested in writing outputs than reading inputs. 
For instance on a plasma cutter you may want to turn off the THC on some 
corners to prevent torch dive.

Les

Jeff Epler wrote:
> I don't think it is possible to enable reading inputs.  Consider the
> following:
>
> ( already in cutter comp mode )
> N000 G0 X0 Y0
> N100 G1 X1
> N200 M66 P1 L0 (intended to say: immediately read digital input 1 to #5399)
> N300 G1 Y[1-2*#5399]  ( so this line either goes to Y1 or Y-1 )
>
> The move on N300 depends on the oucome of the M66 on line N200, but that
> can't be executed until the compensated endpoint of the move on line
> N100 is computed, which depends on the move on line N300, which depends
> on the outcome of the M66 on line N200.
>
> I don't see how to untangle this knot.
>
> Jeff
>   


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