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ContinenteCNC wrote:

How is this information stored in kernel? Is it hardcoded?

LinuxCNC works with the parport_pc kernel driver. (previous to this you had to blacklist parport_pc).
This means that you can refer to parport0 and parport1, as enumerated by parport_pc, though I am not sure that many do. 

So the problem is somewhere in parport_pc. 

github.com/torvalds/linux/blob/master/dr...parport/parport_pc.c (maybe)

I have one more question about this issue recognizing Sunix cards.

So, let's assume these cards are not being automatically recognized as parallel ports because they are not listed as such in kernel.

How is this information stored in kernel? Is it hardcoded?

I know this isn't a issue that deservs so much talk, but if all it takes is someone to code it and ask a pull request to kernel I would love to do this work.

There are also some cards that load parport_serial driver instead of parport_pc. If this is the case I think that would be a coding I could do.

Again, not a big of a deal, but I would like to help and this seem to match my skills.

That's the go.

vre wrote:

All these CAM are dragknife not tangential.
Tangential knife has an extra C axis that is mounted on Z axis to actively rotate the knife.

Oh sorry I wasn't aware of the difference.

The Axis interface hides the spindle buttons if it doesn't see certain connections in the HAL file:

github.com/LinuxCNC/linuxcnc/blob/master...cripts/axis.py#L4201