XY compensation / horizontal size expansion [feature request]

[Patola]

This is a VERY important feature that deals with fittings on 3d printed parts.

The newer slic3r allows it (XY compensation),
the newer Cura (horizontal size expansion),
and the newer Simplify3D (horizontal size compensation).

Different names but the same concept: amount of mm to expand (positive) or contract (negative) the XY layer.

Its best use is to compensate the border of the most exterior stream of extruded plastic, which is what prevent fittings from working (e.g. a 0.4mm nozzle will have and exterior border of 0.2mm, so you need to compensate by using this setting with -0.2mm).

Please add this feature. The algorithm for the compensation is already there: it's sort of what you use for skirts and brim (the expansion of the exterior lines of the part - only for XY compensation you have to expand interior parts too). Implementing it on the slicing should not be difficult.

[gobrien4418]

The flip side of this is the expansion of hole diameters; which get
smaller for the same reason, i.e. the path line runs down the centre of
a 0.4mm wide extrusion, thus 0.2mm of it is inside the print. Perhaps
the same or a similar value could allow for expanding holes?

Related and possibly worth considering at the same time is a thermal
expansion coefficient. Especially with ABS, the whole part shrinks
something wicked once it comes off the heated bed. It might be nice to
have an X-Y expansion factor (ratio or percentage) that is automatically
applied as part of the filament profile?

On 17/09/2015 02:55, Patola wrote:

This is a VERY important feature that deals with fittings on 3d
printed parts.

The newer slic3r allows it (XY compensation),
the newer Cura (horizontal size expansion),
and the newer Simplify3D (horizontal size compensation).

Different names but the same concept: amount of mm to expand
(positive) or contract (negative) the XY layer.

Its best use is to compensate the border of the most exterior stream
of extruded plastic, which is what prevent fittings from working (e.g.
a 0.4mm nozzle will have and exterior border of 0.2mm, so you need to
compensate by using this setting with -0.2mm).

Please add this feature. The algorithm for the compensation is already
there: it's sort of what you use for skirts and brim (the expansion of
the exterior lines of the part - only for XY compensation you have to
expand interior parts too). Implementing it on the slicing should not
be difficult.

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[RyushoYosei]

I was just looking for this feature as it is a very very important feature.