3D Printer Prototype

3D Printer Prototype

Fully functional prototype of 3D printing firmware

3D Printer Firmware

Functionality:

• Support for text GCode file, tested using Wanhao settings in Cura.
• Printing model must be stored in model.gcode file in the root folder of external SDCARD to be visible for printer.
• Model transferring to the printer internal memory and Prining are two different command. Transferred model can be printed unlimited amount of times without retransferring
• Smooth head movement
• Limited Table elevation configuration available
  • Lower by 0.1mm
  • Raise by 0.1mm
  • Raise by 0.05mm
  • Set Zero. Table elevation is not saved autmatically, Configuration should be saved by using "Zero" button. Otherwise on printing start table will be returned to the previous 0 position
  • Move to current zero. Reconfiguration after printing is not required. On new print table will be returned to the initial position (Zero). Manual return performed by "To Zero" button
• To replace filament "Heat" will raise nozzle temperature to 220C.

Disabled functionality

• Pause/Resume is not supported
• Model Transferring progress is not displayed
• Printing progress displayed by number of commands remaining
• Material settings overrides are not available

Supported Commands

• G0 and G1 commands interprets as the same command
• M24 command extension is not supported

Known Issues

• For leaking filaments like PETG introduces leakedge areas on angles and in the head-stop positions, as a result model has minor defects that doesn't affect construction.
• Sometimes table elevation leads to intensive filament extrusion, affects configuration commands only. Can be fixed by starting printing model and aborting the print after table elevation command started.
• Head stop controls are not available. To set position to (0,0) head should be moved manually.
• Table elevation on long distances should be done manually.
• In case of Display failure, no option to reset it without resenting the whole printer
• Configuration commands can be executed in a middle of the printing, this leads to printing interruption and disconfiguration of the printer state.

STM HAL Based components library

• DMA protocols are not supported
• Display provides limited configuration. Orientation configuration is not available.

Printer Emulator

Functionality:

• Full set of functionality available for 3D printer is supported by emulator

Known issues

• Only one printing session is available for a single program run. To start new session program should be restarted
• Memory limit for both internal and external storage is limited by 1MB, and cannot be configured.
• All printing layers are drawn with overlap on a plot area. The second layer printing process is not visible.
• Temperature indicators doesn't display data in idle state 0000 displayed instead.
• Table elevation and extrusion process is not supported