When do you implement the code (g29) I put it after g28 in my slicer start g code settings as I thought it should activate before the start of the print. now I can type it in pronterface it works but if its part of the gcode script pronterface doesn't recognize the command

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pronterface should still send the command, the error echo should be from the firmware code on the board. is the g29 G29 capitalized?

can you show the start code?

To be honest it was not in capitol letter in the slicer start code but I thought it wouldnt matter saying that I can manually type g29 and it works ill try using a capital in slicer ok ty

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Check my rubbish blog for my prusa i3

up and running
[3dimetech.blogspot.co.uk]