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Hey all,

I recently got a dual extruder for my Ender 3 Pro (IDEX dual extruder) and I'm having trouble printing with the second extruder

The second extruder has a habit of failing mid print. It can’t extrude the filament, and makes a slipping, thumping sound when printing, causing there to be incomplete infill. Here's the strange thing though, when I stop the print to check the filament, it's not clogged. If I extrude some PLA after stopping the print it comes out just fine.

I’ve tried increasing the temperature, changing the nozzle, and slowing down the print, but it continues slipping. I tried doing a test print file with two different color blocks and that file printed successfully, but this other file continues to fail. Both files use the exact same print settings. Something interesting to note is that even in the test block print, I hear occasional slipping, but the print still comes out successfully

I’m thinking it has something to do with either the extruder motor, or the print settings, but I’m not completely sure. I’ve ordered another brand of bowdin tube as well in case that’s the problem. I’ve also attached the file I'm trying to print, the test file I made, and some pictures of what the failed print looks like. You’ll be able to see the weak infill the higher the print goes and stringing in the photos

Please let me know what you guys think, I feel like I'm reaching the end of ideas I've got. Thanks