I have a cylinder that has wall of 1.5mm thick.
I want to print it as 3 perimeters without any infill. My nozzle is 0.5mm and I set extrusion width at 0.5.
Layers are set to 3 Perimeter Shells.
In Advanced I have Thin Wall behavior set to : Allow Single extrusion walls and Perimeter Only.
However instead of just extruding 3 perimeters S3D extrudes 2 and makes "dashed" lines inside. Printer shakes like crazy when it's doing that. Here's picture of the preview. Is there a workaround for this?
Can't make 3 wall cylinder
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Re: Can't make 3 wall cylinder
Well, I should've searched first. Sorry, found the answer in this thread 
viewtopic.php?t=3088
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Plastic Guy
- Posts: 1
- Joined: Wed Feb 27, 2019 6:38 pm
Re: Can't make 3 wall cylinder
Possible update on the 2015 advice, with a little more design flexibility not requiring merge to solid model...
Fully automatic method using Simplify defined extrusion widths and inner and outer perimeters (most likely) different from middle extrusion width:
a. divide target wall thickness by three
b. Processes\Advanced Tab\Thin Wall Behavior
-Allow single extrusion walls
-Allow single extrusion fill
c. ...\Advanced Tab\Single Extrusions... Be sure the value computed in (a) falls between the min and max printing width values
Example - Target: 1.5 mm three perimeter wall; .4 extrusion width (Extruder Tab preset); 1.5 mm/3 = .5 mm
default value for min and max is in some cases 50% and 200%; .5 mm is between .25 and 1.0 mm, so project will print;
inner and outer perimeters, .4mm; middle perimeter, 1.5 mm - .8 mm = .7 mm
Manual method to allow user control of perimeter thickness values :
a. same as (a) above
b. change Processes\Extrusion width to any reasonable value your printer can handle; if you set wall thickness /3 = this value, then all 3 perimeters
will be the same width; if not, then interior perimeter = target wall thickness - (inner + outer perimeter thicknesses)
c. be sure to respect (c) above
Example as above: Same target wall thickness, 1.5mm; set perimeter to user defined for example .42mm; expect inner and outer
perimeters to be .42 mm; expect inner perimeter to be 1.5mm - .84mm = .66mm. (all values between 50% and 200% of
.42mm.
All this is hypothetical. I did not print out the examples but did create a simple thin 1.5mm walled hollow cylinder with 6 radial full height wall to center splines (also 1.5 mm thick) in Fusion 360, and using the methods described, it sliced as expected. The whole thing went real quick, taking a lot longer to describe than to do.
The utility of the methods above over the change to solid strategy is that all other features in model will be preserved; you can still have top and bottom layers, interior walls, splines, gussets, holes, extrusions, etc.
I just started with Simplify 4.1 this week, so do not appreciate the differences between version capabilities. Earlier versions may not have the single wall behaviors and single extrusion function. I had been using an antique version of Slicr and really should have migrated to more capable silicers sooner.
Good luck,
John E
Fully automatic method using Simplify defined extrusion widths and inner and outer perimeters (most likely) different from middle extrusion width:
a. divide target wall thickness by three
b. Processes\Advanced Tab\Thin Wall Behavior
-Allow single extrusion walls
-Allow single extrusion fill
c. ...\Advanced Tab\Single Extrusions... Be sure the value computed in (a) falls between the min and max printing width values
Example - Target: 1.5 mm three perimeter wall; .4 extrusion width (Extruder Tab preset); 1.5 mm/3 = .5 mm
default value for min and max is in some cases 50% and 200%; .5 mm is between .25 and 1.0 mm, so project will print;
inner and outer perimeters, .4mm; middle perimeter, 1.5 mm - .8 mm = .7 mm
Manual method to allow user control of perimeter thickness values :
a. same as (a) above
b. change Processes\Extrusion width to any reasonable value your printer can handle; if you set wall thickness /3 = this value, then all 3 perimeters
will be the same width; if not, then interior perimeter = target wall thickness - (inner + outer perimeter thicknesses)
c. be sure to respect (c) above
Example as above: Same target wall thickness, 1.5mm; set perimeter to user defined for example .42mm; expect inner and outer
perimeters to be .42 mm; expect inner perimeter to be 1.5mm - .84mm = .66mm. (all values between 50% and 200% of
.42mm.
All this is hypothetical. I did not print out the examples but did create a simple thin 1.5mm walled hollow cylinder with 6 radial full height wall to center splines (also 1.5 mm thick) in Fusion 360, and using the methods described, it sliced as expected. The whole thing went real quick, taking a lot longer to describe than to do.
The utility of the methods above over the change to solid strategy is that all other features in model will be preserved; you can still have top and bottom layers, interior walls, splines, gussets, holes, extrusions, etc.
I just started with Simplify 4.1 this week, so do not appreciate the differences between version capabilities. Earlier versions may not have the single wall behaviors and single extrusion function. I had been using an antique version of Slicr and really should have migrated to more capable silicers sooner.
Good luck,
John E
