New-ish to printing. I have had several large and small prints complete without issue and look great for a beginner. I have an Ender 3 V2, no mods, standard software default, using Cura 14.3. I have had several files on the printer where the test strip prints perfectly on the left side of the bed and as the head transitions to print, it speeds up to 500-700% speed. Needless to say it looks terrible so I stop the print. I am able to "Tune" on the menu to 100% and that will fix the issue but when I go back to the main menu the "Tune" goes away and the file speeds up again. I am using PLA on a .4mm nozzle with the following settings: print speed-50mm/s, travel speed 150mm/s, infill 50mm/s and wall speed at 25mm/s. I have also had some files ( I get most from Thingiverse) run the test strip on the right side of the bed at a ridiculous speed and glob up and never proceed to the middle of the bed to print, I also stop those from printing and have chalked those up to bad files (or n00b user error?).
I am lost. I don't like leaving the menu on tune where I can't see the status. When I tune down to 100% on the printer everything seems fine. Is there a setting I am missing while slicing the files? Is there a setting/method to set print speed for different sections of a print?
I am looking for beginner tips of what to try or see if anyone else has had this issue. I am lost and am not sure what to do, any inputs/guidance would be greatly appreciated.
Photos:
1 - Example of a speed up, 711% lower left corner
2- When I tune it to 100%, everything is great but I have to stay on this menu
3 - Great level tune/test, but need to stay on the tune menu and decrease speed before the item begins printing after the test strip.