7 Printing

Make sure that the nozzle and the bed are heated to the desired temperature. If you forget to preheat the printing nozzle and the bed before printing the printer will automatically check the temperatures of the nozzle and the bed; printing will start when desired temperature is reached - it can take several minutes. However, we recommend preheating the printer beforehand as described in the chapter Calibration.

Do not let the preheated printer idle. When a printer is preheated and non-printing material in an extruder degrades over time - it may cause the nozzle to jam up.

Watch the first few printed layers to be sure filament has attached to the bed properly (5 to 10 minutes).
Press the LCD-knob and choose the Print from SD option from menu, press to confirm and pick the desired model model_name.gcode. Printer will start printing the object.

The filename (.gcode) must not contain any special characters otherwise the printer is not able to display the file on the LCD. If you remove the SD while printing, printer will pause automatically. When you reinsert the SD, press the LCD-knob and choose “Continue” option. Confirm and printing will resume.

Printer firmware allows the filament change during the printing. This option is useful when the filament is running out and you can change the spool and continue with print. Choose the Tune and then Change filament option during the print. Printer will pause the printing process, unload the filament and signals you with the sound to insert the new filament. When you confirm the filament was loaded correctly printing process will continue.
Other options to use the filament change is a multicolored print. The procedure is the same as above - choose the Tune and then Change filament option during the print. Printer will pause the printing process, unload the filament and signals you to insert the new filament.
When you change the filament, LCD displays the message “Changed correctly?” with three options:
“Yes” Everything went ok and printing can continue. Check if the new color is clear without any remains of the previous filament - if yes, choose this option to continue printing with a new color.
“Filament not loaded” If the new filament was not loaded properly, choose this option and the printer will start the automatic filament load again. When the filament is loaded properly, you can choose the “Yes” option and the printing will continue with a new color.
“Color not clear” Filament was loaded but the color is still spotted by a previous filament. Press the button with this option and the printer will extrude more filament from the nozzle. When the color is pure without any remains of the previous filament you can choose the “Yes” option and the printing will continue with a new color.
You can repeat this procedure as many times as you want - the result for instance can be a five-colored object.
When printing is finished let the nozzle and heatbed cool down before removing the printed object. Always handle the printed objects when temperature of the bed and nozzle drop to the room temperature, when the bed is hot objects are very hard to remove. Pull the bed towards you and remove the object gently. You can also remove the binding clips, remove the glass with object out of the printer and then separate the object from the glass.
If you experience any troubles removing the object (especially the small ones) you can use a flat tool like a spatula or Stanley blade.

Pict. 8 - Removing the model from the glass with spatula

In rare cases part of the glass can gouge with the object. With normal glass it could happen more often, with tempered glass we use with Original Prusa i3, it’s extremely rare case. If this is happened to you just use the other side of the glass or you can get the substitute glass from our e-shop.

Substitute glass is also handy when you’d like to print another object immediately after finishing the previous one. Just remove the glass from the bed and let the object cool down out of the printer. Use the gloves when manipulating with the glass - its temperature can reach 100 °C.