Incorrect feedrate with six axes?

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17 Apr 2019 06:23 #131041 by cmorley
I don't wish to discourage you but the guy who added the lookahead code has said that adding ABC rotary axes is problem riddled.
Adding UVW might be easier since they are linear.
IIRC, there are some google videos writeups in machinekit that talk of how it works.

github.com/LinuxCNC/linuxcnc/tree/master/src/emc/tp

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17 Apr 2019 16:42 #131057 by Todd Zuercher
There was an experimental branch that extended the new tool planner to UVW.

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17 Apr 2019 16:50 #131058 by jamesgao
That sounds promising! Can you point me in the direction of that branch?

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17 Apr 2019 19:16 #131067 by Todd Zuercher
This may be a little old (it pre dates the JA merge into Master).
github.com/LinuxCNC/linuxcnc/tree/feature/uvw-blending-dev

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17 Apr 2019 19:29 #131068 by Todd Zuercher
That branch was started partially at my behest. I needed blending to work on a machine with XYZW axis (two Z axis). By the time this was ready for testing I had already figured out another work-around that worked for my application. So the work of maintaining a git-pull on a factory production machine did not appeal to me, so I never used it beyond some simulations and few test runs. (That is what I remember from 3 years ago and the accuracy of my recollection could be suspect.)

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