I'm on Stage 08 → Steps 19 and 20, and I'm installing the stepper drivers. I have:
3 x white TMC2208 stepper drivers
4 x red A4988 stepper drivers
I ordered the following upgrades:
Heated bed
Flexplate
Power pack
Dual extrusion
Silent printing upgrade (3 x pieces)
I'm confused as to where I need to install which stepper drivers. I have 5 holes on the control board (as far as I can tell) in which stepper drivers can go. I have 2 of the white TMC2208 boards in the left-most holes (identically to how the guide suggests).
Should I leave the other holes empty? Or should I install some stepper drivers in them? If so, which ones: white or red?
Below: A picture of what I have installed already. Note the extra 3 holes to the right of the white TMC2208 boards. I now have 1 x white TMC 2208 + 4 x red A4988 boards left.
You will need to install the red A4988 drivers in the remaining slots.
The remaining white TMC2208 driver you can keep as a spare.
In the firmware installing stage there is a step that describes how the stepper drivers are activated in the firmware.