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ShapeOko and GRBL shield microsteps

From the original Synthetos forum (2011–2025)

Started by Jan on in grblShield Support. 5 replies, last activity Jun 29, 2012.

Jan #

I noticed there is a modification of microsteps for Z axis. ( from 8 default to 2 microsteps). I also bought from you GRBL shield and I am not sure if I must also make such a modification or not. Can you please let me know?
Thank you

aldenStaff #

If you are running the Shapeoko I recommend making the Z axis mod. Here is a page describing the rationale and instructions. It's quite simple and takes about 5 minutes. If you are running another CNC machine like a Zen Toolworks or a Probotix this is not necessary.

http://www.synthetos.com/wiki/index.php?title=Z_Axis_Mod_for_Shapeoko

Jan #

Thanks Alden for the reply.

But why is that modification needed for Shapeoko?

Jan #

Alden,Thanks for the reply. You say I need not make the mod if running a different machine from ShapeOko. Is that problem with ShapeOko caused by the fact that ShapeOko uses both belts (X and Y axes ) and rod( for Z axis)?

I would like to use GRBL shield with a CNC that uses thread rods for all 3 axes.

Is there any rule how I can find out the mod is necessary?

Thanks again for the explanation

aldenStaff #

Since you are running 3 threaded axes you do not need the Shapeoko mod. Sorry for the confusion.

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