LexMaker

1) Is this a brand new hardcore? First I would try a different core to make sure the problem is with the core and not something else (filament, bowden, feeder, cura setting). It is brand new, but i was printing with another core without underextrusion. 2) Which nozzle are you using on the hardcore? Does it match the "line width" in cura? You can't slice for a 0.4 core and then put a 0.25 nozzle on there and expect it to work just fine. You have to adjust the line width. I'm a newb, but I'm not an idiot. I've altered settings applicable to this nozzle size, which is 0.4mm 4) Did you mess with speeds? Are you using default profile speeds? I tried adjusting speed with no change in the underextrusion issue. Here is the result at 125% (on the right) as compared to 100% (on the left): EDIT: 150% made it worse. Trying to slow it down significantly next

So that didn't work! Help!!

I've just installed a Hardcore and I'm having sever underextrusion issues, and I'm a n00b at the FDM printing, so please excuse this. . . I'm going to try raising the temp as speed changes didn't help, and even prints with 70% infill are brittle. I've not tested with other material yet, only some older PLA from Argos. Will changing the temp help for underextrusion? EDIT: I've just read that I should lower the temp on the package for the print core, trying that first

Has there been any progress on this front??