Posts: 19
Joined: Wed Jun 24, 2015 11:10 pm

Need help with internal perimeters blobs!

Sun Mar 24, 2019 6:24 pm

Hi, having a little problem with Blobs on the inside of my perimeters. this is only happening on internal walls, and only with my PLA profile? (retraction is 0.5mm @40mms,costing @0.2mm direct drive, i3, 0.6mm nozzle, 0.3mm layer height)


Also, have another issue on the internal walls where they echo what's on the opposite side......maybe Thin Wall Behaviour setting?

Internal thin wall type = allow single extrusion fill
Allowed perimeter overlap = 20%
Ooze Control Behavior (ticked):
Only retract when crossing open space
Force retraction between layers
Perform retraction during wipe movement
Only wipe extruder for outer-most perimeters


Thank you for taking the time to read.

Posts: 24
Joined: Mon Mar 04, 2019 12:53 pm

Re: Need help with internal perimeters blobs!

Mon Mar 25, 2019 9:24 pm

Go to the gcode preview and Look at your travel moves and retractions. See if they correspond with the area the blobs are appearing.

0.5mm of retraction seems very low to me. Try increasing this to 1 or 2mm. When in doubt, you can also enable “Wipe Nozzle” under the extruder tab. I use a wipe distance of 2mm which works relatively well on my Rep2.

Good luck!
Personal Printer: Replicator 2
Yeah... I need to upgrade...

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