Distribution of Seams
Layer Starting Point：reference point of calculation, the coordinate will be treated as the starting point of the layer.
- Fixed: will take the Fixed Start X and Y (below) as the Starting Point
- Center: Coordinate of the center of the model
- Min.: Minimum XY coordinate of the model
- Max.: Maximum XY coordinate of the model
- Previous Layer Ended: Use the layer ending point of the previous layer.
- Random: Randomize the starting point
Fixed Start X: Value for the Fixed option of Layer starting point
Fixed Start Y: Value for the Fixed option of Layer starting point
Perimeter Start: To optimize starting point of a perimeter toward particular shape/location
- Nearest: Seams start at the nearest seam of the same layer, so the extruder jump distance will be minimized.
- Convex: Seams go to convex region
- Concave: Seams go to concave region
- Coincide: Seams align with seams of previous layers
- Random: Randomize position
Infill First: Check this will print the infill before any perimeters.
Appearance of Seams
Joint Size: Percentage base on path width, determine the size of the seams, the bigger the value the larger the seam region.
Joint Extension: how long the seam path will go into the infill region. This value will affect the seam alignment as the extension increase. If this value is 0, Joint Crossing will also disabled.
Joint Crossing: Whether the seam is made by crossing the start and end path or avoid each other at the joint.
Following figure shows the seam of different combination of joint size, joint extension and joint cross.
Models are identical cylinders printed at 0.2mm layer thickness, normal speed, PLA plastic:
Apparently, extended joint looks better than no-extended joints, the crossed joints are more inconspicuous than the uncrossed joints in general. However the crossed joints are bigger and less affected by the joint size value. The uncrossed joints looks better at certain range of joint size.
Please note that apart from above settings, seam appearance is also the result of the combination of factors such as tool path geometry, print speed, extrusion scale and etc. So in other shapes the joints are likely to have different appearance as of the simple cylinders of above.