Quantity   Component name
1 × Raspberry Pi 3 Model B
1 × Arduino UNO R3
12 × simple bearings
1 × several sheets of 3mm plexiglas were cut using a laser cutter
1 × Arduino UNO Shield for three stepper motor drivers I built mine by myself including the level adjusting circuit, but there are also some to buy online (if you wish to use grbl, be sure that the pin configuration matches the one from grbl)
1 × Waveshare 7inch Touchscreen
3 × Nema 11 Bipolar Stepper Motor
3 × SilentStepStick driver
1 × Proxxon MicroMOT 50
1 × leadscrew 0,5 metre should be fine (needs to be cut)
1 × metal rods 1 metre should be fine (needs to be cut)