The port of the 3D printer has a CP2102 IO uart (USB port) and the PC needs a driver to communicate with that device. Sometimes the drivers install automatic when connecting the USB cable. I tried that but it did not and Windows show an error flag in the device manager.
Then I used the driver that come with the 3D printer. I started the installer from the back up files I had done earlier. Followed the instructions from the manual but I got a message that it could not be installed.
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I have Windows10 64 bit OP system in my computer. After I downloaded the installer I started it and did the installation. Note: You can not use the Windows driver installer, you must use the supplied installer above.
By far the most interesting upgrade I did is changing the original A4988 stepper drivers, for TMC2208 silent drivers (TMC2130 would have been a good choice too). Luckily, the stepper drivers are not soldered directly onto the Trigorilla board, but can be unplugged and replaced at will. I bought a set of 4 TMC2208s for about 20$, they came with (mandatory) heatsinks and a small screwdriver to adjust voltage (more on this below) :
Then I installed the heatsinks, making sure they were oriented correctly for the airflow of the fan duct. Finally, I adjusted the reference voltage on each driver, which required to power on the machine:
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