How to create thin wall with 3 perimeters?

[maker2]

My objective is to print a hollow cylinder vertically with only 3 perimeters and no gap fill or infill.

In order to create a thin wall with 4 perimeters I create a wall in Autodesk Fusion360 with a thickness = 4 Extrusion Widths

Since my extrusion width is 0.42 (120% of 0.35, the nozzle width) I give the cylinder walls that are 4 * 0.42 = 1.68mm thick

and with Layer settings set to 2 outer perimeters this works great.

However if, with layer settings still at 2 outer perimeters I give the cylinder walls = 3 extrusion widths i.e. 3 * 0.42 = 1.26mm

Simplify 3d does not draw 3 perimeters but only 2 with a gap between them.

Yes one can use the Advanced setting for "Gap fill" but this produces a zig-zag trace that is very slow to print.

The reason for wanting to print the cylinder with 3 walls is to save on TIME and MATERIAL.

Any suggestions?

[C-line]

If you want your walls to be solid (no infill), you need an even number of perimeters. (Or a single perimeter with vase mode.)

If you need a solid, two-perimeter wall thicker than 0.84 mm, just increase your extrusion width. Depending on layer thickness and speed, your 0.35mm nozzle can produce an extrusion width of 0.7mm or more.

[jimc]

another way to do this is in the advanced tab select merge all outlines into a solid model then in your layer tab set top and bottom layers to zero and infill to zero. set the # of perimeters you want at the thickness you want and your good to. s3d will stack the perimeters perfectly.

[DarthRevan]

x2 what Jimc said. Easy as pie.