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Simplify3D problem

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Simplify3D problem

There are two issues. (from a post by Doug Kightley)

Firstly, the behavior that if a single filament will not fit, then its not generated. This results in complaints about the slicer not working correctly....the argument against this being that the printer should only work within what it physically can do and by not printing, it's highlighting an error in the design. A simple solution would be to have a check box to allow working one way or the other.

The second issue relates mainly to the quality of top & bottom surfaces where the width of the wall section is not a multiple of 2 times the extruded filament width...resulting in gaps and holes on the surface. The "Allow gap fill where necessary" option should get rid of the gaps....but it doesn't seem to do so reliably....and it certainly doesn't show up as having much of an effect on the print preview. A more effective gap filling control is required...preferrably one that does not need adjustment of several other options as well.

Legs are printed with errors

Other slicers print correctly

This Mothers Day Sculpture I printed obviously had legs that are too thin. Simplify3D prints the legs incorrectly or perhaps correctly based on its idea of accuracy but the end result is a waste of filament! I did stop it before it was complete but still it's only good for the trash! The one that printed was sliced with Craftware which has become my slicer of choice now.

Again part printed with errors

Slicer was fooled to print this

When trying to print a part for this Vise I again ran into a wall that I guess was too thin. I do have a cheat to fix these issues I change my nozzle size from .40 to .35 in the software and I manually change the extruded size down to .39 assuming the design has .40 walls this fixes the issue but creates under-extrusion issues.

Problems using .35 fix

Printed at .40 settings

So my dirty quick fix works for the thin walls as long as they are at least .40 thick but the side-effect can be seen in the incomplete threads of the knob also for the Vise. The other has been printed using .40 nozzle setting and an extrude size of.48 and the threads turned out perfectly.

Usually I print .STL files from other people so I don't have access to any reliable method of checking for thin wall issues. The preview feature on Simplify3D simply doesn't always show an issue is present, sometimes you'll notice some walls are missing but often it looks terrific with no issues until you see your finished prints!

Users of Simplify3D are asking for some tweaks, the first would be a warning system with problem areas highlighted in red so you know where the issues will be. The second would be an option to override the problem and print anyway even if the final size will be inaccurate.

I will say that I have been using Craftware slicer as it offers 80% of the the features and adjustments of Simplify3D and it actually came in second place behind Simplfy3D in terms of output based on "Which 3D Printing Slicer is Best? 2016 Slicer Throw Down" Part 1 and Part2. The test was done in Jan 2016 and the Craftware software has been updated 3 times (May 2017) so it most likely improved each time.

I'm far from the only person struggling with the thin wall issue in Simplfy3D as seen in the post by Doug Kightley and considering people shelled out $150 for the software you would think they would work dutifully towards a fix or update to rectify the problem. It appears on the forums that this has been reported in early 2015!


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