Grasshopper opennest - help nesting without parts intersecting

Grasshopper OpenNest
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1

Hey! First time reaching out for help here!

I’m trying to nest around 1000 parts for plasma cut & engrave. I’m using OpenNest. Each part has a part number and (3) facets numbers for our welder to assemble the parts without confusion.

I successfully grouped the curve-drawn labels within their respective closed-curve geometry, using a combination of ‘merge’ ‘rhino objects’ & ‘region union’.

Prior to my grouping method, OpenNest perfectly nested the closed-curve geometry without any intersecting parts. Now that added the labels, OpenNest seems to be placing the grouped geometry all at the same “home” in the corner of my bounding box.

The attached screenshot is of the current grasshopper sequence.

I’ve attached the examble .3dm and gh.

Nesting Reference-01
Nesting Reference-011919×1034 177 KB

NESTED GROUPS-ATTEMPT-01.gh (11.8 KB)

nesting test.3dm (193.3 KB)

2

You just need to flatten the geometry into the nest component and then graft the transform coming out. If you don’t, it just considers them as completely different nest group which is why you are getting overlaps.

2026-02-04 15_44_04-nesting test
2026-02-04 15_44_04-nesting test2508×600 100 KB

3

Thank you for your rapid response! This is super helpful! I’m finding that, what we’re working with now, nests rather inefficiently. I’m not sure if my inputs are at fault, but I have roughly a thousand parts and no material to waste.

-You’ll have to forgive me, but this is my first week using grasshopper.

Again, Thanks so much!