Follow me tool, curves causing gaps


#1

I’ve attached some images below. Driving me crazy is this. I did a similar design like this a while ago, and I had the problem before, however I thought I solved it by making the surface a group or component, but it doesn’t work now so I’m not sure. Why is it leaving gaps where I drew curves?

<img src="/uploads/default/original/2X/e/e36e487d65a47f7762f9bc3659e9ff77c7809ee5.PNG" width=“663” h


#2

Your curves and/or profiles have so short segments (<1mm) that SketchUp cannot form faces. The usual solution is to scale the model up by 10 or 100x and to scale it back down when finished.


#3

I solved the base curve by making it follow a line which had the radius of the base. The other center curve doesn’t work the same way. Will try what you mentioned.


#4

As Anssi says, SketchUp’s tolerance is 1/1000", so tiny edges cause issues with processes like FollowMe and some similar Plugin tools…
SketchUp was designed to model building and any related elements, but not the innards of swiss-watches, or cities - so very small, and very large dimensions are a stumbling block in several operations…
If a resultant edge has its start and end points nearer that this then SketchUp assumes they are coincident and no edge is created.
This becomes more noticeable if the new geometry is around curves, since the tiny facets can become very very small.
Because faces rely of edges to define them these small facets do not get created either - because of the tiny gaps in their loops.
Scaling the geometry up by say x10 or x100 will often alleviate the problem, because there are no tiny edges to be omitted.
One the 3d geometry is made as desired you can Scale it back down by the appropriate factor [0.1 or 0.001].
This tiny geometry can exist, but it can’t be created by SketchUp…


#5

Thanks a lot for your time. Such a nice feeling to see it finally work! : ) The completely explains the strange problems I was having. Normally I scale down last but this time I started at the actual size, which is indeed small. Thankyou!


#6

I generally draw small items like that at the real size but before running Follow Me, I make a component of the profile(s) and path. Then I make a copy of the component over to one side and scale that copy up by a factor of 100 or 1000. I open the large component for editing and run Follow Me. Then close that component and delete it. Returning to the original will show that the faces were created there, too. You can see how that works for me here: http://www.finewoodworking.com/item/109593/chess-pieces-a-look-at-follow-me-with-small-parts

Scaling up and back down works but I’ve seen plenty of cases where users scale up with one handle and scale back down with another which results in the object being located some distance from where it was. A few years ago I saw a model of a Greene & Greene-style chessboard drawn by a friend. He had scaled up and down several times in the process of drawing it and it wound up being located several miles from the origin. He also had a very tiny stray line near the origin and when he hit Zoom Extents, it looked like his model had been deleted.

I draw most components in place where they’ll be in the final model so my process of working on a large copy works very well for me.


#7

He’s an example of what Dave is saying. I’m working on some tiny pieces of machinery for 3d printing. The real size is in mm but I make large components as necessary to edit so the originals never move.