hello, if you use it on A20 , need update firmware that support 3d touch . pls check which version control board does your printer has , then update corresponding firmware . if it is V4.0 board , pls update firmware A20_G05(CH340 Support 3Dtouch)
https://www.geeetech.com/download.html?download_id=32
and check whether you connect the 3d touch correctly or not .https://www.youtube.com/watch?v=NVi_Ba-aF0U
any more question , you can create a support ticket on our website https://www.geeetech.com ,
My Account --log in --Help&Support ----New ticket ,
Our technical support will reply you directly.The machine code may at side of the printer .Â
if you do not find/ know the machine code, it does not matter , write any 14 code is fine.Â
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