Looking for correct rotary axis settings

From the original Synthetos forum (2011–2025)

Started by mara on in TinyG Support. 2 replies, last activity Aug 29, 2015.

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I am trying to get a rotary axis running with TinyG and Shapeoko 2.

The Github listed settings I have entered to control the rotation don't seem
to make any difference as entering different values for $tr travel per revolution and $ara radius value in Coolterm does not change the amount of rotation when jogging the A axis in Chillipeppr.

I am not sure the travel per revolution setting is working for a rotary axis on the 4th motor as when a value is entered $4tr=360 the result is given ; 360 mm
when it should be in degrees or maybe I have missed something.

Testing with a piece of dowel the right diameter for a rotary axis job the cutting occurs on roughly only 90 degrees.

Any advice greatly appreciated.

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Thanks for reply, Updating the firmware in Chillipeppr to 440.18 corrected the settings for the 4th motor as a rotary axis.

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