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Honeycomb infill shifts and scaling


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Posted (edited) · Honeycomb infill shifts and scaling

I have two questions about using the infill addon to create honeycomb infill:

1) sometimes, but not always, there are shifts in the alignment as shown in the attached image, is this a bug?

2) is there a way to scale the size of the honeycomb pattern?  Infill density has no effect, unlike the built-in infill patterns.

I'm using the 5.8 beta release because it has the K1 Max printer settings.

 

Edit: after watching the machine try to print this I noticed that the shift is particularly detrimental to honeycombs as the lines connect at an angle so bridging material doesn't end up on the intended line, i.e. the intended end point of the line segment is hanging in the air so the extruded material gets dragged to the side rather than the intersection point.  It took maybe 30 layers before it managed to patch itself up at the point I've circled.  If I could scale the honeycombs to a smaller size this might not be as much of an issue.

 

HoneycombShiftCircled.png

CK1MAX_V2BladeUpperThirdish.3mf

Edited by LindsayPatten
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    Posted · Honeycomb infill shifts and scaling

    It's changing the infill to match changes in the size of the object so that it maintains the same density.

     

    Just turn off Infill > Absolute Tile Coordinates and it will move the hexagons along to match the contour or your object:

    image.thumb.png.a6cf8c7e1bdcde735ee91ad62cdc69fa.png

     

    If you want to change the size of the hexes then change Infill > Tile Size:

    image.thumb.png.f30899460e3d8589650c434d891a49bd.png

     

    Note that these settings will only appear if you have an infill created by the CuraEngineTiledInfill plugin (anything below Lightning in the Infill Pattern list).

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    Posted (edited) · Honeycomb infill shifts and scaling

    Perfect!  Thank you very much!

     

    Edit:  Oh, not quite perfect after all.  Where the infill area is split in two by the hole for the pin the hex pattern in one of the areas jumps.  It then shifts with each layer as the edge along the pin moves forward and then back.  The picture below is from a different segment of the blade but the same thing happens with the first segment, except it doesn't jump so badly, it just moves to match the edge of the hole for the pin.

     

    It seems like it would be nice to have an option that tells it to keep the pattern fixed and not try to move it with the contours of the object, matching the way the grid pattern for example works.

     

    It seems that there might be a degree of circularity between the tile size and the infill density?

     

    Also, for Max Tile Size it says "This setting has been hidden by the active machine and will not be visible."  Why would that be?

     

    EdgeCase.png

    Edited by LindsayPatten
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    Posted · Honeycomb infill shifts and scaling
    4 hours ago, LindsayPatten said:

    Oh, not quite perfect after all.  Where the infill area is split in two by the hole for the pin the hex pattern in one of the areas jumps.  It then shifts with each layer as the edge along the pin moves forward and then back.  The picture below is from a different segment of the blade

    The problem here is that the model is being divided into two separate sections:

    image.png.fd3a2beaf2c7c84e2ea2043466e5b6b5.png

    So the section on the left stays where it is, because the walls it starts on haven't moved. But on the right it restarts the pattern from the new starting point.

     

    5 hours ago, LindsayPatten said:

    It seems like it would be nice to have an option that tells it to keep the pattern fixed and not try to move it with the contours of the object, matching the way the grid pattern for example works.

    Catch 22: That setting is Absolute Tile Coordinates.

    Here's one of my test models (it's completely straight) with absolute coordinates turned on:

    image.thumb.png.129d9bb57d6eff6d61b05b2eee99bd30.png

    Where it splits and merges, and such, the tiles stay in the same place. But if I turn absolute coordinates off:

    image.thumb.png.20cd8ef2dc39e64059a2371fdddbd46a.png

    The tiles shift so that their pattern is started on the walls. If we look at just the upper section:

    image.thumb.png.cafc04e08dc5c572b9992ab566770197.png

    They both start with a corner in the top-left, then a hex with its left wall in the left wall of the model below that.

     

    Okay, so why do the hexes on yours move when absolute coordinates are turned on? That I wish I could answer for sure. If we look from above in an orthographic view:

    image.thumb.png.87512492d73b1e4ca63f78548cac364c.png

    The new grid it's using is exactly half a hex across from the previous one. Since Tile Shape is set to hexagon (duh) it's possibly considering half a hex across (where the vertical lines attach to it) a point on the grid. If we set Tile Shape to square, it's consistent... but hexes are broken:

    image.thumb.png.195de0ba75151ee947cb0aacaaae1491.png

     

    So I'm not sure I can provide any ultimate answers, unfortunately. Played around with the settings a bit but couldn't find anything that would work they way you want (and to be honest, the way it's reasonable to expect.

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