Printing different object than what is in G-code


#1

The printer is printing something that has no represented g-code anywhere on the card. I don’t even know how it is deciding to print the picture on the right.

Whathuh
What could possibly cause this? From what I have read there are faulty card readers on the machine that have to be replaced. Does this look like something that would be from a defective card reader?


#2

Have you tried to reformat the SD card yet? That would be my suggestion first.


#3

Make sure you’re running the latest firmware version 1.18. https://wiki.peopoly.net/doku.php?id=moai:firmware

And always format the SD card, then create a folder in the root directory called “gcode”, and then add your gcode files to that folder. And always make sure to power cycle the machine before starting a new print to ensure that memory is cleared.

Never overwrite or delete-then-copy files to the SD card and expect it to work every time. There’s a long-standing bug where the file reader seems to fail to read FAT cluster addresses properly. This can manifest as printing a previously deleted file, or printing a new file that then transitions to printing an older file about half way through, resulting in weird file overlapping artifacts.


#4

OK I’ll try that. This happened to a previous print as well, it was a good 20 hours into a print then started printing the picture on the right.


#5

yeah give the advice that @BrianStone suggested. The SD cards that are supplied are very touchy, and have produced some results I’ve never seen. I personally use a Kingston card with a micro SD I haven’t seen these issues with this method, BUT I do format after every print, frustrating, but it seems to be totally fine.


#6

reformat the SD card will fix the problem


#7

Also be sure to power cycle the printer between each print.