Upgrading Anycubic i3 mega with SKR 1.3
Most of the "fun" of a 3D printer is to tinker with it. My faithful anycubic i3 mega was on the old side, the custom touchscreen makes it nearly impossible to modify as far as UI go. So let's swap the boards. I bought a SKR 1.3. It is cheap, well supported, and using TMC2130/SPI is simple : put the jumpers and done. Not need to rewire/solder anything. Most of the wiring is simple enough, hint : Z1 is the right one, Z2 is the left one. But one thing that had me scratch my head for a bit is the 6 pins ribbon. At first i though it was X*2 pins, Z*2pins, temp *2pins but actually it is not What i could probe is the following : So most of the signals are relative to Black i.e. ground The simplest is to connect Black to the HotEnd0 Ground pin, and Red to HotEnd1 + pin (~ 3v) If you dont connect black to something more or less grounded, X, Z & Filament runout switches will not work. The HotEnd0 pin is not , strictly speaking, ground. There is a small re