Odd problem at 80% completion..... Software goes zonky

[RCfanatic]

This is my first post.....
I looked through the troubleshooting guides and didn't find anything that describes what I'm experiencing, hopefully someone can help.

I have a FFCP that is 3 days old. I have had successful prints 3 times, and unsuccessful 2 times. Both failed prints have the same results and the same issue. I get to about 80% completion and all of a sudden the live view of extruder axis positions stops changing, and the amount of commands sent speeds up in a crazy fashion. The extruder itself begins making a completely different sound, and starts printing all over the place, spewing material, with no path that makes sense. The first time it happened I assumed it was a corrupt file from thingiverse..... But now it has done it again with a completely different object. I am including a link to a video of the issue. Thanks in advance for any help!

https://youtu.be/ESnAq36eH_w

[CompoundCarl]

It looks like there's something wrong with the printer communication, since the machine isn't responding how it's supposed to. Could be a bad USB cable, a faulty connector on the control board, all kinds of things.

An easy solution would be to just print from the SD card. If the print works fine there, then it definitely means something's wrong with the USB communication from the printer

[RCfanatic]

I didn't even think about that. I'll give it a try. Thanks!

[RCfanatic]

An easy solution would be to just print from the SD card. If the print works fine there, then it definitely means something's wrong with the USB communication from the printer

Thanks for the tip! I printed from the SD card and all 3 were successful. Now, to figure out what the heck is causing the communication error so far into the print.