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Summary of Contents for Original Prusa i3 MK2.5
- Page 1 Beginner’s Guide to Operating the Prusa i3 MK2.5 3-Dimensional Four-Color Printer Kayla Pelloni and Adriana Noyes Northern Vermont University - Johnson May 17, 2019...
- Page 2 Table of Contents Starting up the Printer ........................1 Getting to Know the Info Screen ....................1 Menu ............................2 Preheating ........................... 2 Self-test ............................3 Calibration ........................... 5 Loading and Unloading Filaments ....................8 How to Upload a G-Code to the Printer SD Card ................10 How to Print From the SD Card.....................
- Page 3 Starting up the Printer 1. Make sure the Prusa printer is plugged into the wall outlet. 2. Turn on the hood over the printer by finding the box labeled “Sentry Air Systems”, and turn the black dial all the way to the right. 3.
- Page 4 Menu To access the Menu, press the orange knob on the front of the printer. Here is what the screen will display (turn the orange knob clockwise to see more options, and press the knob to select an option): Preheating It is always necessary to preheat the nozzle before beginning printing processes.
- Page 5 Self-test The self-test ensures that everything is working properly with the printer. 1. Go to the Menu, and select the Calibration option: 2. Select the Self-test option on the Calibration menu: 3. The Printer will read “Self-test Start”. Just wait a few seconds. 4.
- Page 6 6. The screen will now read “Checking Endstops”. Just wait as the printer runs through these processes; each should read “OK” after each process if there are no issues. 7. If all goes well, the printer will automatically return to the Info screen, and display “Self- test OK”...
- Page 7 Calibration Calibration is done in order to make sure that the nozzle is exactly where the printer thinks it is when printing. 1. Preheat the nozzle to the appropriate nozzle temperature, as listed in the first section of this manual. (Ex. PLA: 215°C/55°C) See the section titled “Preheating the Nozzle”...
- Page 8 6. If the nozzle is at the highest Z-axis point, which it should be, press “Yes” to the next prompt: 7. Place a sheet of paper on the heatbed, and press the orange knob to continue. 8. The screen should now read “Searching bed calibration point”. Allow the printer to run through all four processes without interuption.
- Page 9 Here is the screen you will see next, if there are no errors or interuptions: Congratulations! XYZ axes have been calibrated successfully.
- Page 10 Loading and Unloading Filaments One of the most common problems when working with the Prusa is that the filament occasionally breaks during or before a printing process. This issue can be resolved by reloading the filament. It is best to reload all four filament extruders before beginning the printing process.
- Page 11 Here is how to load all filaments: Note: The nozzle MUST be preheated before beginning this process. Please refer to the “Preheating” setting in this manual for more information. 1. Each filament must be cut at a 45° angle before loading. Using a heavy duty pair of scissors, tilt the scissors at a 45°...
- Page 12 How to Upload a G-Code to the Printer SD Card 1. First, search online for a template to print. The easiest way is to search for 3D printing templates for the Prusa MK 2.5. Once the file of an object to print has been located, download the file to the Data Drive (E:) >...
- Page 13 6. This will bring up a window of all the files on the computer that are compatible with this software (.stl, .obj, .amf, .xml and .prusa files). Select the file downloaded in step 1. This should bring up a picture of the downloaded 3D model on the plane. Note: the block shown in the corner of the plane is the waste block the printer will use to alternate colors throughout the print;...
- Page 14 How to Print From the SD Card Note: It is only after running through the Calibration (page 5), Self-Test (page 3), and Pre- heating (page 2), and Load all Filaments (page 8) processes described in this manual that one can begin to print a model. Please ensure that all these steps have been completed prior to printing a model.
- Page 15 4. Once the printer has fully completed printing the object, there will be a prompt to unload filaments. Select the option to Unload All filaments used in the print. This will allow the printer to extrude all excess filament from the nozzle before unloading the filament.
- Page 16 This will display a menu of settings that can be adjusted during the print. Select an option, and turn the knob to increase or decrease temperature, flow, or speed of a feature. Press the orange knob after dialing in the correct value to change this setting. The printer will automatically return to the info screen and begin adjusting.
- Page 17 Troubleshooting Here are some common errors in the printing process, as well as some solutions to take to reduce these errors: Stringing and Blobbing Adjust Extrusion Rate Extrusion Rate (Flow) is the value which determines how much filament is coming out of the nozzle.
- Page 18 Generally, with any filament, the higher the temperature is raised the stringier it will get. If the prints are really stringy, try dropping the temperature. Here’s a print with identical print settings, except the temperature was dropped ten degrees in the second print: Notice how the stringiness has been reduced.
- Page 19 The top layer of the print should be smooth without any gaps, if gaps are present in the top layer then the extrusion rate is too low. The perfect extrusion rate will have a smooth, gapless top layer with tiny gaps in the infill. All exterior edges should be smooth as well. Retraction Retraction is the amount that the printer will rewind filament after it finished a section of printing.
- Page 20 If there is no improvement lowering the retraction, try setting the retraction speed in printer settings to 20 millimeters a second for PLA. For most filaments 60 millimeters a second is the ideal speed so increase the speed until there is improvement in the stringing. Here is how to adjust retraction in Slic3r: 1.
- Page 21 Quick Tips • Hold down orange knob on printer for a faster way to adjust z-axis position • The nozzle and heat bed temperatures can be manually changed before or during the printing process by going to Menu > Settings > Temperature, and selecting the mechanism to adjust or set.
- Page 22 Contributions Kayla Pelloni is the primary contributor to the Beginner’s Guide to Operating Prusa i3 MK2.5 3- Dimensional Printer, developed in Spring and Fall semesters of 2018. Kayla constructed and formatted the sections of the manual focusing on “Starting up the Printer”, “Loading and Unloading Filaments”, “How to Upload a G-Code to the Printer SD Card”, and “How to Print...
- Page 23 the model could not be printed on a small scale with the Prusa 3-dimensional printer due to gaps in the model as a result of flight issues. Adriana Noyes carried out the upgrade of the Prusa MK2.5 to MK3 during the Fall 2018 and Spring 2019 semesters.
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