thin walls issue printing

[z3d]

i have an with the size of the piece i am trying to print which is x 12 y 11.99 z 8.89 and it has very thin walls. i have a flash forge finder. i found the passage below on the faq that talks about how to fix the issue . how much should i decrease the extruder width? it was set auto to .40mm i set to .29mm but it made it worse. i tried to print the piece with flashprint stock app that comes with my printer and it printed perfect. i am confused
as to how i can get it to print correct with Simplify3d. thats the program i want to use. i also went through the Print Quality Troubleshooting Guide but it didnt really address my problem or at least i couldnt find an answer.

any help is great appreciated.

The first place to investigate is to compare your extrusion width setting to the size of your model. In order for the software to slice your model, your extrusion width setting needs to be smaller than the model dimension. For example, if the wall of your model is .35mm thick and you have the extrusion width set at .40mm, the extrusion is actually larger than your model. This will cause slicing problems because the software is attempting to place the line of filament "inside" the dimension of your model. When the extrusion width is too large, the filament will be forced "outside" the model dimension. Therefore, the model will not slice properly and your model will will have holes in the Previewer. To resolve this, there are two methods- you can decrease the extrusion width or make your model larger. If you cannot change the size of the model, try reducing the extrusion width. For example, on the .35mm thick model described above, reduce the extrusion width from .4mm to .3mm and the model will slice perfectly. Note, the extruder head will have trouble printing an extrusion width smaller than the nozzle diameter so try to keep the extrusion width setting within a close range of your extruder nozzle diameter for optimal print quality.

[dkightley]

Have a read of this set of threads: viewtopic.php?f=23&t=3471

This may help explain why S3D does not print what you are expecting it to.

[CompoundCarl]

I've had a lot of success printing smaller features by reducing the extrusion width as mentioned in their print quality guide. You said it got worse - what do you mean by that? Maybe it would help if you posted your factory file (File > Save Factory File)