No version has ever been able to use concentric infill for the INSIDE of the part (although I'm not sure why you would want that anyways). I just opened up V2.2.2 to verify this. The old version AND version 3.0 can both do concentric infill for your outer solid layers, which is the only place where I can imagine you wanting it.
did you try to set the infill to 100%? For me printing Ninjaflex with concentric infill works like a charm and the whole part gets a solid concentric infill.
Regards
Carlos
Regards
Carlos
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Simplify3D v3.0 on Creatr HS
Under infil tab you have the choice of rectilinear or concentric. It's there 100% when I use it I what the extruded go round and round, no other movement other than round.
When I print my tires with ninjaflex it's the only one that results in a good finish. I tried with v3.0 and it was a wreck, I used rectangular on v2.2 and still get holes on the top layers.
So it's there in v2.2 and works I've attached a photo of the results, left is the concentric one, the middle is rectilinear, right is V3.0 with the extra over lap for bridging. I'll add a photo to illustrate that it does have the concentric option in a sec
I know you emphasized INSIDE and on 2.2 is states external but if the setting in infill only does the top and bottom layers as per the setting then I should have a gap in the wall. similar if not the same as vase mode.
So I'm in a quandary as you can see the see from the results the 2.2 on the left is the best one with 100% infill. But on 3.0 I can't get the same. As you can see on the right.
So if you are correct, are you saying 0% infill in order to replicate the same conditions?
i print a crap load of ninjaflex. enough that i buy it from fenner by the case. the way to get clean prints with that is to do what you can to avoid jumps. unfortunately your model needs support so avoiding jumps is almost impossible. joe is right though. concentric is only for top and bottom layers. that never changed anything as far as the interior infill goes. do you have an old gcode or factory file of this tire from 2.2.2 that you could share?
There is no problem... set your exterior infill to concentric, then in the layers tab set top and bottom layers to both be 999, or more if your model is large with lots of layers.