[Alternative CORE for Ultimaker3 available, the 3D solex "HardCore"]

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

 

[Alternative CORE for Ultimaker3 available, the 3D solex "HardCore"]

So that didn't work! Help!!

[Alternative CORE for Ultimaker3 available, the 3D solex "HardCore"]

On 4/20/2018 at 10:24 PM, gr5 said:

I print with .4 at same temp but .8 10C cooler.  It depends on nozzle size and also printing speed (volume of filament going through the nozzle).

 

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

[Filament RunOut Sensor on UM3]

Has there been any progress on this front??