ghosting with dual extruded print

[mthompson239]

Flashforge pro
Current Simplify3d version

Made a cover with an Adidas logo. Getting ghosting of the Adidas logo on either side of center.

See attached.

Main is red with Orange logo. The ghosting is in red by the way.

[mthompson239]

Now looking more at the pics...looks like the nozzles are not level. Which i assume is the biggest problem with dual printing. Any suggestions short of loosening one of them until flush with the other. As leveling would not play a factor here.

[dkightley]

Entering "Ghosting" in the Search box yields a handful of hits....one of them is:
viewtopic.php?f=9&t=4592&p=19931&hilit=ghosting#p19931

[mthompson239]

The above link you posted does not apply as they are printing with 1 extruder and was suggested to offset the non-used one so not to touch the surface. I am printing with both extruders. I will however have a look at the search results since now i know "ghosting" is the proper term for the event.

[dkightley]

That link may be applicable....as the "ghosting" is on a dual head printer, and what the issue is that whilst one head is printing, the other head is being moved over the surface of the model and with it being hot and drippy, it's affecting the surface of the layer....giving the ghosting effect.

The thread suggests that the two heads are not correctly aligned vertically and that the non-printing head is a tiny bit low, resulting in it touching the top layer of the model whilst the other extruder is printing.

[mthompson239]

Agreed...and will make adjustment tonight. is there a function that allows for back feed of material once said layer is completed or it switches to printing on other extruder? This would allow the stop of any dripping onto other layers.

[mthompson239]

Just found this feature!!!

Ok, so my settings are (not attached image...thats from another member):

Only retract when in open spaces; yes
retraction distance: 12.00mm
extra restart: -.50mm
tool change retraction speed 600.00mm