Reverse run on BeagleBone Black

I guess this is to do with the way that you can add and remove HAL components while running with Machinekit.
It might be easier to find an old version of the PRU driver code on github and re-compile on your system.

The other way you may be able to back off is to use an external offset which is supported in master branch. This would be essentially like jogging the machine away from the workpiece while running.

rodw wrote: The other way you may be able to back off is to use an external offset which is supported in master branch. This would be essentially like jogging the machine away from the workpiece while running.

I don't think that would work for wire EDM. How do you control the direction it backs-off in?

Would you be able to calculate the tangential plane in a similar way to how you were helping me with arcs? Then move to a parallel position?

Maybe. But reverse-run seems better.

The BBB problem is easily addressed simply by using something else

Andy and the original poster are right as without reverse run EDM will not work, but this is true always for sinker EDM, wire EDM can make do (and they did for quite some time ) without it.
It is unreasonable not to have it, even if it can work without it, as it will save a lot of time and effort to make proper parts.
And as Andy said before, get a normal PC, usually it is cheaper than the BBB.
What type of signalling does the power supply provide ? A digital pin when there is a short or an analogue out depending on the current ?
The second version is much harder to configure properly, but after that it never needs reverse run during normal work.
The first version does not work without reverse run.
Etc....
Tired.... need sleep badly