Prusa i3 MK3 - Common Printing Problems and Solutions

12.7  Printing problems
12.7.1  Layers break and split when printing from ABS material
ABS material has a higher thermal expansion than other materials. We suggest other
materials like PET, HIPS or PLA when you print larger models.
12.7.2  Models contain either too much or not enough of the filament
You can manage the filament flow during the print. Use the LCD-knob and choose Tune -
Flow - xx% where you can adjust the filament flow. Pronterface users can enter the value
M221 Sxx into the command line.
When you change the filament flow, the next print will use the same settings unless
you change it again in the menu, or reset the printer, or unplug it from the power
source.
12.8  Problems with finished models
12.8.1  Model breaks and/or is easily damaged
This is a typical feature of larger models printed from ABS. If you have set the temperature
properly, the printer is away from drafts and object design is right, the printed object should
not break. The easiest way to avoid breaking, or overall model fragility, is to choose a
different material. The strongest are PET, HIPS and PLA; while PLA has low heat
resistance, PET is the firmest and has the lowest thermal expansion.
When parts break and there is no spare time to reprint the model you can use
super glue or any other glue for plastics for temporary fix :).

12.9  Updating printer firmware
A firmware update is a simple process which is done via the USB cable and a computer.
With the driver installation a program called FirmwareUpdater V2 is installed on the
computer. The latest firmware can be found on http://www.prusa3d.com/drivers/ where you
can find the latest guide on which firmware to choose and detailed instructions for the
process. The printer will reset automatically right before the update and after the update is
finished. First Layer Calibration is required after the firmware update, see chapter 6.3.9
First layer calibration.
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