zeroing

This topic has 2 replies, 2 voices, and was last updated 12 years, 4 months ago by nmanousos.

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July 14, 2012 at 5:08 pm #3338

nmanousos
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Is there a recommended way to zero with the tinyg? I usually use a piece of paper to get my z-axis to 0.1mm above my stock. I would then like to set the z-axis to zero.

I am unsure how to do that, I have been just resetting and compensating for this 0.1mm above stock in my CAM setup. Any advice would be appreciated, thanks!

July 15, 2012 at 7:15 am #3339

alden
Member

The normal way to do this is to issue a G92 command. Type G92 X0 Y0 Z0 to zero all axes. What’s actually happening is a bit more complicated, and involves the coordinate systems. The G92 is actually an offset to the currently active work coordinate system (G54 by default) – allowing you to specify the coordinates with which you would like to refer to the current tool position. More references can be found on our wiki:

https://www.synthetos.com/wiki/index.php?title=Projects:TinyG-Gcode-Support#Length_Units_and_Coordinate_Systems

http://www.synthetos.com/wiki/index.php?title=Projects:TinyG-Homing

Also, see the Kramer NIST spec for how G92 functions. This is what we coded to.

http://www.isd.mel.nist.gov/documents/kramer/RS274NGC_3.pdf

-Alden

July 15, 2012 at 1:01 pm #3340

nmanousos
Member

beautiful, thank you!
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