I decided to power it up and let it do a self test using a variable power supply adjusted to 5volts, it failed the test with light flashing and blinking non stop the pin refused any movement except to flutter uncontrollably and never successfully completed any part of the self test. It was as though it was struggling to operating with reduced power.

I downloaded the online manual from geeetech.com. Verifying that the supply voltage needed was indeed 5volt @ 300mA max current.


3D Touch.jpg

I decided to try to adjust the supply voltage just a little to 5.6 Volts input now it started to act like it was designed,
although the supply voltage was no longer at the recommended voltage of 5volts.

And if they do not work I will be designing my own touch switch. As I found this one Here on Thingiverse

https://www.thingiverse.com/thing:3580179

Including many links to all his resources.
This was my 1st testing of a 3D Touch so I am assuming that the components are out of specs causing the device to not operate correctly at 5volts.
I would like it if you could post a short video of the way your BL touch operates, this could be a similar problem and help in diagnosing your problem.