Hi all. I'm new in the world of 3D printing and I could really use some advice/help with my UM2+ . I'm having problems with a 0.6mm nozzle on the first layer of ABS (Ultimaker brand). I've tried adjusting numerous things:
re-leveling the glass surface
adjusting the print temperature, everything from 215 to 240
adjusting layer heights starting at 0.15mm and up to 0.25mm
I read somewhere to adjust the Retraction Minimum Travel (I've lowered it to 0.5mm to no avail)
I've played around with retraction distance and speeds too
print speed currently at 40mm/s and travel 120mm/s, i've tried going down to 35mm/s print speed
I'm using Wolfbite's ABS formula (I've also used the glue stick) but adhesion doesn't seem to be an issue.
Am I missing something really obvious here? Again, I'm new at this so I'm hoping there is something simple that I just haven't set correctly. Any help would be greatly appreciated, thanks!
Also, is the nozzle supposed to look this dirty?? I've done about 8 prints with this nozzle, however they were 7-10 hour prints.