The K8200 works fine but I wanted a bigger print area and in case faster movement of 0.9° steppers.
The mechanic part is based on the delta design, but larger and higher.
I still have to design the mechanics but am working on the controller board.
Based on arm cortex stm32F407GT6 clockrate 168Mhz
Stepper drivers LV8727E 6x (X/Y/Z and three extruders.
The LV is not a full stepper but good micro stepper up to 1/128 microstep and far higher clock input.
Visual: a 5 inch TFT 262K color
3 extruders? Indeed but all to a single nozzle.
This is an ambitious goal, and you will surely push the envelope.
Multiple extruders feeding a single nozzle sounds like it will be tricky, but if you succeed you could do a lot of nice things. At first I thought mixing of different filament colors would be a problem, but then I began to wonder if it could be an advantage…
I will watch your progress with great interest.
There’s mix of colors is limited, the cold extruder must retract if another extruder have to push the second filament. I will post pictures as soon when the build parts are ready.