Phil0110

Cool! I also have Creality Ender 3 the eleventh. I really like it! I created a small figure, it's the first of my creations.

It sounds like you're having some difficulties with adjusting additive and drilling tool paths in your algorithm for converting STL files into G-code. It's possible that the center of the coordinate system is being modified when importing the STL file into Cura, but it's unclear what transformation is being applied.

It sounds like you might be experiencing some initial layer adhesion issues. One thing you could try is adjusting your bed leveling to make sure the nozzle is the correct distance from the bed. You could also try adjusting your initial layer speed and temperature to help with adhesion. Additionally, you could try enabling "coast" or "wipe" settings in your slicer to help prevent the nozzle from dragging through the printed object. Good luck!

You may want to consider using alternative build surfaces that are more durable than glass, such as PEI sheets or BuildTak. These surfaces are known for their toughness and can withstand repeated use without being damaged. Additionally, you could consider educating your students on proper print removal techniques, such as allowing the build plate to cool down before attempting to remove the print or using a spatula to gently lift the print off the plate.

I can't see a problem on the photo, could you explain?

Check your printer's firmware settings: Make sure that the steps/mm values for each axis are correct. These values determine how many steps the motors need to take to move the axis a certain distance, so it's important that they are set accurately. You may need to adjust these values after making changes to the printer's hardware. Calibrate your extruder: The extruder is responsible for pushing filament through the nozzle. If it is not calibrated correctly, it can lead to under or over-extrusion, which can affect the dimensional accuracy of your prints. Adjust your print settings: In Cura, you can adjust various print settings that can affect the dimensional accuracy of your prints, such as the extrusion width and flow rate. Experimenting with these settings can help you achieve better accuracy in your prints. Consider designing your parts with a smaller tolerance: If you are having trouble with parts coming out too large, you can try designing your parts with a smaller tolerance to compensate for the changes in your printer's hardware.

Hello!

Generally, an older 3 with high work time and multiple (relatively new) nozzles may not necessarily be a better buy than a 2+ with low mileage. The work time of the printer does not necessarily affect its print quality, but it may affect its reliability and maintenance needs. It's important to check the condition of the printer and its components, such as the bed, belts, and bearings, to ensure that they are in good condition. In terms of the nozzles, having multiple nozzles can be advantageous for printing with different materials or achieving different levels of detail, but it's important to check their condition as well.