4th axis tangent to path XY

Hi,
is it possible at low level (HAL layer) move automatically 4th axis tangent to XY path?

do you have suggestions?

Thanks,
Michele

Cutting with a blade ?

This does come up now and then, here is a starting point...

www.linuxcnc.org/component/option,com_ku...imitstart,6/lang,en/

Rick G

Thanks.
I have to cut with a disk round parts, the disk orientation must be tangent to path.

In this moment i'm thinking to calculate the angle with a external python module and generate right g-code, but my final idea is to move this routine in real time tread to have this automatic.

Michele

I have attached a modified kinematics file in which the A axis value automatically changes to suit the direction of movement.

You can install this with You can then swap "trivkins" for "tangentkins" in your HAL and INI files.

It probably needs more work.

Thanks, i try to use the file.