Hello there,
I've been working a while now on an 3D-printer specialized in paste materials, mainly clay. I've been expoloring extrusion methods and ended up with an mechanical extrusion system (one stepper for an ram extruding material from an cardridge and one stepper for dosing capabilities). For now im using one material but want the option to move to dual extrusion / mixing extrusion in the future. Because i have a quite heavy extrusion system, carrying the material with it (7kg) i want two drivers for the Z motors.
Only with an single extruder I end up with X,Y,Z,Z,E1,E2; 6 drivers, i want to use TMC 2209 because of their stallGuard option, preferably on an Atmega 2560. When i want to run an extra extruder i end up with 8 drivers. How many drivers can an 2560 hand (they use and bidirectional UART pin). I know the 2560 only has 3 hardware serials, so my guess is the rest has to run of softwareserial.
- Does anyone knows what the (reliably) amount of drivers is depending on softwareserial.
- Is this UART line in use continuously or only during setup and setup-related M-codes?
I want to create my own PCB; there is a lot of stuff i don't need on regular motherboards (thermistor inputs/heating options etc) (and $$$, single tmc2209 are way way cheaper).
Greets Tom
I've been working a while now on an 3D-printer specialized in paste materials, mainly clay. I've been expoloring extrusion methods and ended up with an mechanical extrusion system (one stepper for an ram extruding material from an cardridge and one stepper for dosing capabilities). For now im using one material but want the option to move to dual extrusion / mixing extrusion in the future. Because i have a quite heavy extrusion system, carrying the material with it (7kg) i want two drivers for the Z motors.
Only with an single extruder I end up with X,Y,Z,Z,E1,E2; 6 drivers, i want to use TMC 2209 because of their stallGuard option, preferably on an Atmega 2560. When i want to run an extra extruder i end up with 8 drivers. How many drivers can an 2560 hand (they use and bidirectional UART pin). I know the 2560 only has 3 hardware serials, so my guess is the rest has to run of softwareserial.
- Does anyone knows what the (reliably) amount of drivers is depending on softwareserial.
- Is this UART line in use continuously or only during setup and setup-related M-codes?
I want to create my own PCB; there is a lot of stuff i don't need on regular motherboards (thermistor inputs/heating options etc) (and $$$, single tmc2209 are way way cheaper).
Greets Tom