Hesitation between two consecutive G33 codes

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9 years 4 months ago #94273 by 10K
I'm using 2.7.8

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9 years 4 months ago #94291 by andypugh
Replied by andypugh on topic Hesitation between two consecutive G33 codes
I wonder if this is a feature of the new trajectory planner?

Try ARC_BLEND_ENABLE=0

linuxcnc.org/docs/2.7/html/config/ini-config.html#_traj_section
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9 years 4 months ago #94295 by 10K
I added to my .INI file:
Code:
[TRAJ] ARC_BLEND_ENABLE=0

I threaded a pipe at 300 RPM. No hesitation at all between G33 codes! It's working great.

Is this likely to affect anything else I'm doing on the lathe? Or is it mostly for milling?

I'll post the code to " O Codes (subroutines) and NGCGUI - Lathe Library" later today.

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9 years 4 months ago #94297 by Todd Zuercher
Replied by Todd Zuercher on topic Hesitation between two consecutive G33 codes
It changes the Trajectory planner back to what it was before 2.7, with one line look ahead and parabolic blending. It can cause a series of short moves to be slower than they have to be, by limiting the maximum feed to what what the acceleration settings can bring to a controlled stop by the end of the next line. It is less likely to be a limiting factor on a lathe than a router.
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9 years 4 months ago #94310 by 10K
I've posted the pipe threading routine at:
Code:
https://forum.linuxcnc.org/lathe-subroutines-library/32895-pipe-threading

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  • verticalperformance
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9 years 4 months ago #94378 by verticalperformance
Replied by verticalperformance on topic Hesitation between two consecutive G33 codes
It's not the same issue as this forum.linuxcnc.org/20-g-code/29685-g76-p...aper-linux-cnc-2-7-0 is it? I'm not sure if this has been corrected yet in 2.7.x

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