Interwoven Perimeters

[tjhalva]

Suppose there are 5 vertical perimeters and 5 top perimeters, a simple illustration of the current behavior is below:

VVVVVTTTTTT...
VVVVVTTTTTT...
VVVVVTTTTTT...
VVVVVTTTTTT...
VVVVVTTTTTT...
VVVVVIIIIII...
VVVVVIIIIII...

• V = Vertical Perimeter Row
• T = Top Perimeter Row
• I = Infill

Interweaving the Top and Vertical perimeters in some fashion such as below may have some benefit to strength:

VVVVVTTTTTT...
VVVTTTTTTTT... <---
VVVVVTTTTTT...
VVVTTTTTTTT... <---
VVVVVTTTTTT...
VVVVVIIIIII...
VVVVVIIIIII...

The above illustration are the side view of a box.

The layers with the <--- have the Vertical Perimeters only 3 wide, while the Top Perimeter extends.

Is your feature request related to a problem? Please describe. Eliminating the edge between the Vertical Perimeter and the Top Perimeter can create a stronger join.

Describe the solution you'd like I'm not sure what patterns would be the most desirable, but the alternating concept illustrated above could simply have a checkbox for:

• Overlap Top Perimeter and Vertical Perimeter: True/False
• Overlap Width: Probably defined in mm, but there is some nuance with the thickness when using Arachne.

Describe how it would work This is an optional feature that could be enabled when the Top and Vertical Perimeter settings are above some defined threshold. This doesn't make sense to do if they are 2 units, but 5 in the above example allowed for the box tooth pattern.

Describe alternatives you've considered None.

Additional context This was sort of inspired by the more complicated concept of staggering layers like a brick pattern to improve strength. That concept is much more complicated.

[neophyl]

I might be missing something but you haven't defined what the difference is between a vertical perimeter or a top perimeter ? At the moment we have external perimeters and perimeters. We don't have top or vertical, at least not in any definition I have seen. So what exactly are you defining or referring to ?

[tjhalva]

My terminology is all wrong. :(

"Top Perimeter" would be some combination of:

• Bridge infill
• Solid infill
• Top solid infill

"Vertical Perimeter" would be:

• External Perimeter
• Perimeter

"Infill" was intended to be "Internal Infill".

Here's the sequence from lower layer to top layer:

In the blue hand drawn oval, instead of always having the top meet the side, instead have the side extend a few layers deep.

[tjhalva]

This probably makes the most sense to do on the "solid infill" layers.

OYYRRRRR...
OYYPPPPP...
OYYPPPPP...
OYYPPPPP...
OYYBBBBB...

Could have the purple cover like two rows less:

OYYRRRRR...
OYYPPPPP...
OYYYYPPP... <----
OYYPPPPP...
OYYBBBBB...

Each character is just the color of the layer in the above screens.