RepRec assembly pit: Difference between revisions
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– may be acceptable vitamins for [[scale transposed prototyping]] since they are [[on scaledown vansihing vitamins]] being replaced by vdW forces <br> | – may be acceptable vitamins for [[scale transposed prototyping]] since they are [[on scaledown vansihing vitamins]] being replaced by vdW forces <br> | ||
… it is still a rather bad hack for [[scale transposed prototyping]] as finer details like <br> | … it is still a rather bad hack for [[scale transposed prototyping]] as finer details like <br> | ||
surface tension like [[vdW | surface tension like [[vdW suck-on]] combined with [[incommensurate interdigitation]] <br> | ||
are not really emulatable with the constraints given by magnets. <br> | are not really emulatable with the constraints given by magnets. <br> | ||
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– either juts a few points of strong attraction from small magnets <br> | – either juts a few points of strong attraction from small magnets <br> | ||
– or very specialized shaped magnets needed <br> | – or very specialized shaped magnets needed <br> | ||
– and the presence of polarity of magnets unlike for [[vdW | – and the presence of polarity of magnets unlike for [[vdW force]]s <br>… (with [[Keesom forces]] being the only exception of vdW forces with polarity anchored to the [[crystolecule]]s). <br> | ||
== Related == | == Related == | ||
Latest revision as of 15:30, 17 May 2026
The idea here is to have special assembly jigs in the form of specially shaped bowls
that help in the process of assembly for assemblies that get a bit more challenging.
This is about rigid jigs and low interaction forces.
Jigs for bending structures would be a separate concern and concept.
Application cases
Possible application cases include:
- assembly of RepRec 3D frame nodes
- assembly of RepRec rotative stacks
Generally:
Helping in pre-assembly before post-tensioning.
Holding everything together before being tensioned.
Why a pit
At the macroscale (so long not in microgravity) it is natural to use gravity to aid in the assembly process.
And due to gravity being anisotropic facing in a single direction a pit is the self suggesting structure.
Making things simply stick in other directions too obvious options include …
– clipping and
– adding magnets.
Clipping means of preliminary holding
Adding clipping requires more part complexity
and bending plastic (particularly cheap PLA) makes it wear fast even when avoiding permanent load.
If there is post tensioning extra clipping structures remain staying in as dead weight ballast.
Magnets
Adding magnets adds a bit less complexity but requires much more parts post processing.
Possibly manual processing of every part gluing magnets in or so.
Other means of holding things together preliminarily
Note that vacuum only works for the robotic actuator end-effectors(s).
Whereas this is about holding many tings in a preliminary configuration.
Mesoscale (watchmaker scale) explored could be …
– electrostatic attraction and
– surface tension,
… but both pose nontrivial challenges
Nanoscale crystolecule assembly context – pick your poison of over-engineering
No matter what type of assembly aid jig one goes for, being it …
– a gravity assembly pit,
– in assembly aiding clipping between parts, or
– magnets.
It's a matter of picking your poison in where to put the over-enginering
to cover for the shortcoming of macroscale physics that is the lack of dominant vdW forces.
While magnets …
– may be able to emulate vdW forces somewhat acceptably in omnidirectionality and short range, and
– may be acceptable vitamins for scale transposed prototyping since they are on scaledown vansihing vitamins being replaced by vdW forces
… it is still a rather bad hack for scale transposed prototyping as finer details like
surface tension like vdW suck-on combined with incommensurate interdigitation
are not really emulatable with the constraints given by magnets.
Constraints like …
– either juts a few points of strong attraction from small magnets
– or very specialized shaped magnets needed
– and the presence of polarity of magnets unlike for vdW forces
… (with Keesom forces being the only exception of vdW forces with polarity anchored to the crystolecules).