FeatureScript User Community Spotlight

konstantin_shiriazdanov

Laggy Gearzzz  aka Syncro Rotator Feature script
https://cad.onshape.com/documents/a0adddcc041efb15f8c3ad2a/w/4e997c4fe738a2030fa71786/e/8a74e08a2998e0d0e6ea7e87

Ben_

I have played with this and for the life of me I cannot get the dialog to show the "angle step" any suggestions?

konstantin_shiriazdanov

Hi, @Ben_ make sure you are in B1 workspace, and be careful with angle step, if the number of iterations is too big part studio gets laggy (this is why i call it Laggy Gearz)

Ben_

B1? Branch one? If I'm correct yes I am in branch one and still no luck

konstantin_shiriazdanov

@Ben_ B1 seems to be the second branch, if you are in B1 workspace and seeing those old version of realization it may be some kind of bug
and one more observation about bahavior of this FS - looks like opBoolean which is used internally fails when bodies at some angle have a tangent surfaces. it can also be used for bodies with non parallel axis like bevel gears and worm gearing

Ben_

I'll give it a try later, seriously this is awesome, on my copied version B1 did not copy over so maybe that was my issue. I should have looked at the original.

Ben_

Updated the script and all works now FYI. This is a super helpful tool for me and my work. Thank you! 
On a side project I have wanted to design up a clock using gears like this. I know that the chances of it working are slim but one hast to try... 
https://www.youtube.com/watch?v=3LdlSAN1yks

konstantin_shiriazdanov

@Ben_ glad it was useful for you. Wish OS developers to implement native functionality from Parasolid kernel  for smooth and fast generation of the envelope surfaces (if it exists). For now it is only possible such approximate descrete algorithms. Though it's better than nothing in a bunch of other CADs

konstantin_shiriazdanov

I made some improvements to the Measure Distance FS. Now it can handle infinite propagation of measured entities and can measure angles as well. So here it is - Measure Distance Extended.
https://cad.onshape.com/documents/77baa8153589a7fc5f289829/w/cffd0f2a7077380d5378a885/e/d3174bf5315e6aafcb889367

konstantin_shiriazdanov

FS for wrapping sketched curves around cone and cylinder surfaces like 3d curves
https://cad.onshape.com/documents/0bb13c1b6ed6d4a6dd75cf99/w/b4493d47a45c27ce485c84b9/e/c8050a35a7417c12b801bd40

mahir

This FS is a modification of the curve pattern FS that allows you to orient the seed features/bodies/surfaces to maintain their normal position relative to a reference surface. Without the reference surface, the pattern direction is controlled by the curve's tangency. The first pic is without a reference surface. The second is with.

FeatureScript Curve Pattern Normal
 



And this FS does something similar with sweeps. It will maintain a sweep profile's normalcy relative to a reference surface instead of the sweep path. The red surface doesn't have a reference surface. The green surface does.

FeatureScript Sweep Normal

konstantin_shiriazdanov

@mahir, could you please add ability to select wire bodies for sweep path in your SweepNormal FS, like it is done in traditional Sweep

annotation { "Name" : "Edges and sketch curves to sweep",<br>             "Filter" : (EntityType.EDGE && ConstructionObject.NO) <b>|| (EntityType.BODY && BodyType.WIRE)</b>}

mahir

@konstantin_shiriazdanov, done. Wire body support was also added to Curve Pattern Normal.

konstantin_shiriazdanov

@mahir

it was a quick response , but wire bodies are added for edges to sweep, i need them in sweep path too) thanks in advance

mahir

Picky picky :P Done.

konstantin_shiriazdanov

would like to share my FS RectToPolar, it allows to create flat cam profiles based on the 2d sketch with law of motion and sketch coordinate system (defined by mc). Internally it is a modification of SketchWrapper FS for plane to plane mappings.
https://cad.onshape.com/documents/b59ab933bf1592e02614330f/w/a58753fdbb92959793980f44/e/ded816b2c095eb1569913c85

konstantin_shiriazdanov

Curve generator FS - generates parametric curves based on sketch relations between variable-driven geometrical constraints and a point.
All you need to generate the tragectory of the point or graph in rectangular/polar/some another crazy 2d coordinate system - draw the fully constraint sketch, containing relations in dimentions with some external variable without referenses to external geometry (no workplanes and even origin allowed), put inside the sketch a single point (one and only point per sketch allowed), select the sketch, insert variable name, min/max value and step.
https://cad.onshape.com/documents/d8aab1e0e7ae10038a6830e0/w/9dfdd631d025960813b8f2df/e/621b5be97d38074a1f1546e5
update: in V4 version of this FS was added support of local coordinate system (mate connector) which may be linked with some wire of the sketch and relative path of the point will be calculated considering that coordinate system bieng static.

kevin_o_toole_1

@konstantin_shiriazdanov
Just a heads up on your feature above: I'd document that your sketch need to add a "fix" constraint to any sketch entities constrained to external geometry, like I've done here:

https://cad.onshape.com/documents/f24385eecb45f1f41ed5e5ec/w/ea93421858452aa4d5e16d49/e/a33e29b54583fd26afa91ad9

The reason is that sketch patterns remove external constraints (e.g. coincident to origin/external geometry) before patterning. We do this because generally you want the sketch to move when being patterned. However, it can have strange effects in some cases. With your feature, I believe in most cases a fix constraint will be the right solution.

konstantin_shiriazdanov

thanks for clarification, Kevin. I silently implied it, after faced that effects while debugging

kevin_o_toole_1

As a debugging aid, it may also be worth doing single pattern without changing the variable, verifying the result did not move. If it does, you can throw an error or reportFeatureInfo that the sketch needs to be fully constrained with fixed constraints on external entities.

Otherwise, it's a really awesome tool!

mahir

@konstantin_shiriazdanov nice work. At first I didn't see the advantage over my Parametric Curve FS since if you stick to standard coordinate systems, this FS generates the same type of curve, but only 2D instead of 3D. However, the ability to generate arbitrary kinematic paths using geometric construction is pretty handy. All of these curves could be deconstructed into y=f(x), but that is often a non-trivial task. Kudos.

konstantin_shiriazdanov

@mahir, yes if we already have explicit formulas your parametric curve is what we need, my feature uses the power of 2-d solver, without necessity to use external sofware for kinematics/math modeling. When 3d-sketch functionality will appear i'll try to extend functionality of this for 3d curves

john_mcclary

Thank you @konstantin_shiriazdanov for one of the most useful feature scripts I've used to date.
Measure Distance Extended:
https://cad.onshape.com/documents/77baa8153589a7fc5f289829/w/cffd0f2a7077380d5378a885/e/d3174bf5315e6aafcb889367

With this simple tool I was able to "manually" flatten my large diameter "fake-sheet-metal" part and keep it parametric with it's parent
Excellent tool sir!

konstantin_shiriazdanov

@john_mcclary
nice to hear it was usefull, I only improved a good idea. I didn't documented Perimeter option elswhere, so I'd like to mention that it can measure perimeters of faces (not only planar), and total length of any set of edges and face perimeters with any combination, so the main thing is not to select something you don't want to measure)

Michaël

Brilliant... I was wondering how to model a logarithmic spiral. Look into the forum for the past year and not much was usable out of the box. I then your work came up. Life saver! Hats off...

konstantin_shiriazdanov

made a modification of Curve generator FS for tracing dependences betwen driving and driven parameters of a planar mechanism with one degree of freedom defined by fully constrained sketch, driving dimention (for example "x") is a user defined variable, driven dimention (for example "y") should be defined as variable from Measure distance extended FS (with hide distance preview option turned on). Tracer prints the list of the points with the given step to the console in the format {{x1,y1},{x2,y2},{x3,y3},...}, and creates a graph representing y(x) dependency on the top view plane.
https://cad.onshape.com/documents/2e01af46ce2cd5b90ee41156/w/82761270dd57ac2be5d84860/e/274c362e3eeb03f14eaa43c1

evdokia_ershova

thanks a lot guys, i've found some really useful information and some amazing ideas here reading through your posts people.

konstantin_shiriazdanov

Some changes to Measure distance extended FS
- added single query field for a pair of measured entities instead of two fields for two sets of entities
- added ability to hide distance preview (should be used when using this FS with Tracer FS to not to clutter console output by debug messages)
- added ability to flip angle value to (180 deg - angle_value)
- added ability to measure vertex coordinates
- remooved "horizontal enum" gui, now options are in the drop-down list
this version of FS is NOT backward compatible with prevous versions, so do not update your old documents, or you have to select query parameters manualy

konstantin_shiriazdanov

Have something new about curve transforms - Flex FS.
It takes sketch edges or regions and transforms them like if target curve would become a X axis of the sketch. It bends the sketch along some curve.
So it is one more way of making flat cams, text along spline, etc.
https://cad.onshape.com/documents/0bb13c1b6ed6d4a6dd75cf99/w/b4493d47a45c27ce485c84b9/e/964f73eb0179aad8733b9f23

konstantin_shiriazdanov

This FS was inspired by Point pattern FS - Point Pattern ext and was made from the code of Circullar pattern feature from standart library.
It allows all the pattern options from bult in patterns like body/feature/face and new/add/remoove/intersect.
To define the transforms you need to select vertex or mate connector as origin and a set of target vertices or MC's.
Internally for every vertex to vertex transforms the feature keeps global orientation of objects.
For point to MC or MC to point transforms it keeps global orientation on the point side and orientation defined by MC on the side of MC. For MC to MC transforms it uses local orientation on both sides.
https://cad.onshape.com/documents/25a0a6dfaa76e64574a5e0db/w/ed2afaf5bd2d12066495dc84/e/a71ff51699ae36f356a38f69