Fusion360 Motor barking

CNC Machines Shapeoko
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Saw another chattering question here just a moment ago, starting a new thread so I don’t derail that one.
Generated my first simple part in Fusion360, ran a clear pass and am getting some “funny” noise out of the steppers. Specifically on what would be the radii. I tried sending with both grbl-panel and CM and get the same result.

https://youtu.be/9igwEivj9n8

I ran the part and it came out pretty well, but there are some chatter marks that about correspond with the ~29sec mark in that video.

Belts tight, set screws tight, etc. Didn’t do this yesterday, so I’m assuming it’s something with my gcode out of fusion.
Thoughts?ABDB_MiddleSection_.25.nc (87.6 KB)

Quick edit to add that I’ve run some simple-circle tests with gcode from fusions and don’t seem to hear the same squawking…

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Are the curves faceted when cut, or smooth? If faceted, this is an issue with arc generation on fusion.

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They should be smooth, since the G-code is made up of G2 and G3 curves:

G3 X0.0871 Y0.154 I-0.0562 J0.1116

Please check the usual suspects:

  • wiring
  • belt tension
  • pulley set screws
  • V-wheel adjustment
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I assume then that the noise\motion in that video is not expected behavior, given the gcode?

At the risk of beating the v-wheel dead horse; how tight is tight? I find they’ve gotta be pretty darn snug to eliminate any racking in the various carriages… Generally if I can easily roll it with my finger when it’s set against the rail, I’ll tighten it until I can’t easily roll it. Too tight? Not tight enough?

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