Axis oscillating motion

Greetings and respect everyone...

I built a five-axis machine.I'm welding with this machine.

As most of you know, in some welding jobs, the welding torch is oscillated and the filling is made between the two parts.While the other axes move according to the g code, I could not put an axis I wanted on my oscillation.According to my research, external offset can do this job.But I use Linuxcnc 2.7.15 because it is stable.Therefore I cannot use the external offset.

1- Could it be with offset component from the Hal library? (I could not find an example with the offset component. I also could not understand what I read.)

I am waiting for your help, best regards...
Thanks for taking your time and reading.

2.8 is stable and in the verge of becoming the release version. I'd just adopt it a couple of weeks early and use external offsets.
Then you could apply a sine wave generated by sigggen linuxcnc.org/docs/2.8/html/man/man9/siggen.9.html
to the offsets for that axis.

There are some sims on 2.8 that demonstrate external offsets.

I've been using 2.8 and 2.9 for about 4 years and never really had an issue.

Hello Rodw.
Thank you for your time.I will follow your advice.I didn't want to tamper with the working system because I have CAN BUS in my configuration.It is not difficult to guess that it is reliable on Linuxcnc 2.8.

As you said, I solved my problem with siggen and offset component.Thanks for the quick response and correct guidance.

maybe I am writing the solution I obtained to set an example for others.

loadrt offset count=1
loadrt siggen num_chan=1


addf offset.0.update-output servo-thread
addf siggen.0.update servo-thread


setp siggen.0.amplitude 0.5
setp siggen.0.frequency 5
setp siggen.0.offset 0

net offset_sine siggen.0.sine offset.0.offset

#net offset_sine siggen.0.square offset.0.offset


net x_axis_cmd axis.0.motor-pos-cmd => offset.0.in

net x_axis_off_cmd offset.0.out => lcec.0.0.poscommand

net x_axis_fb lcec.0.0.pos => axis.0.motor-pos-fb




Thank you.

Best Regards...