Limit3 question.

Hi. I've always wanted to define acceleration on a hal pin, to change it 'live', but it isn't possible in emc2.

Today, reading here: linuxcnc.org/docs/html/man/man9/limit3.9.html , i've learned about limit3.x.maxs and maxa.

If i understood correctly this limits max acceleration (and velocity) for the given movement into limit3.x.in. Is it?

Do you think can i use some way this parameter connected to maybe a Spinbutton into Gladevcp, where i set the limit of acceleration?
this way i can set an initial Hi acceleration, and then slow this into Gladevcp during axis running.

Any ideas?

Thanks, Davide.

I would like to try this way, but sincerely i don't know which pin can I feed limit3 with..
or, better, where can i after plug the output?

Hi

Haven't tried it but would have thought

stepgen.N.maxaccel which is a RW param would be a good place to start

When emc starts, this is set to the MAX_ACCELERATION figure for that axis from the .ini file

Unless you are doing something very clever, would appear to just need a limit1 component to define the bounds within which the acceleration can be adjusted.

regards

ok, i'll try that. it's a stepper machine, so it will not be so important.

but, what if i do a 'setp stepgen.N.maxaccel my_hal_pin'
does it work?
i would like to set maxaccel with the value of a spinbutton, in the moment when i reset the estop (in the same moment i'm setting my_kins_values from other spinbuttons..), but i really don't know how.

while thinking on this i'll try as you suggest, Andy.
Thanks, Davide.