long curve repeat to get ring belt

[Stefano_GS]

Good morning.
in these days when sometimes you can cut out a few hours I tried to shape a closed ring belt.
I designed the sketch of primitive development, extruded a tooth and tried to make a repeat guided by the curve, settingbut I get a solid not properly correct, the straight stretch is perfect instead I get "a jump" in the passage to the circular portionThe polygonal effect on the outside worries me little and I think it is inevitable.
for that I had thought to extrude only the inner part to the primitive diameter and subsequently extrude a solid that is a ring (in the corresponding primitive development with offset necessary to achieve the correct thickness).
I have no idea how to correct that error on the internal part, especially in the first transitional tooth between the straight sector and the circular sector. Obviously in reality there are deformations that I with a repetition will not be able to model.
trying these options for repeating the result is even worseUntil now I was working in a "becero" way or in autocad lt I drew all the dentatura and I collected at my liking these critical points, then I imported the profile in solidworks and extruded only. I was looking for something faster and more parametrizable.

 

[MassiVonWeizen]

If you draw the belt as a repetition straight strokes it is normal that it does not work because the curves will be broken and therefore you lose so many more millimeters as long is the straight stretch.
you must create the belt in the environment together with the special function and then repeat only the tooth, but you will never get perfection for the reason above.
try to attach files if you require modeling advice

 

[Stefano_GS]

thanks to the prompt response.
Obviously the "perfection" is impossible to obtain because in reality I have deformations that cannot be shaped.
the most "brutta" part is the inner part of the tooth between last tooth on the straight tract and first tooth on the curvilinear tract.
for the file here it is

today I will try in the environment together, now all licenses are in use

 

[MassiVonWeizen]

I opened the file, noting that you can't model it with underdefinite sketches, the motivation is already exposed and that in this way you reduce an arc in a series of strokes. is how to draw a circle with a polygon plus vauments the sides and decrease their most likely length is the circle
Moreover if you want to correctly manage a repetition of the genus you have to quota the length of the path and not interasses and diameters

 

[MassiVonWeizen]

further, in that type of management you will never get a unique body.
to be able to do it you have to repeat the only tooth as function and not as body

 

[Stefano_GS]

I opened the file, leaving that you can't model with underdefinite sketches

You're right, I've done flight tests, but it's never a good habit.

Moreover if you want to correctly manage a repetition of the genus you have to quota the length of the path and not interasses and diameters

the diameters correspond to the primitive diameters of two pulleys actually consistent with the strap step and also the clutter will give me a multiple development of the step.
the command quote/length path I did not know it, but from the guide I would say it is very useful. I imposed the diameters and instead of calculating the necessary entirety imposed the development avoiding a further passage and the approximations of the calculation.

further, in that type of management you will never get a unique body.
to be able to do it you have to repeat the only tooth as function and not as body

with curved method set to offset curve I repeated function, if use curve method turns curve I must forcefully switch to repetition of the body otherwise it does not work

 

[Stefano_GS]

I tried in the environment together but I get the same result.
apart from my difficulties in the environment together (I will have done 3 assiemi in 10 years) which depend on my ignorance the final result is identical.
do not place the file because it is unworthy, the positioning of the tooth compared to the belt function is very approximate (just I have some time trying to do a job done well because I want to learn to do it also in this way)
I thank massive support and patience, also doing the tutorials commands as quota/development I did not know them and are very useful
I am trying to convince the company to take a course with solidworks technicians focused on the specific needs that we detect

 

[Stefano_GS]

I have tried again and actually find a different and worse result in certain aspects.
the repetition function guided by the curve is as if it did not follow some circular traits, so I get two defects:
- in straight strokes the teeth are detached from each other
- in the circular section is as if the teeth tend to get away from the pulley

I then have several problems both to understand how to now possibly rotate the pulleys so that they correspond to the teeth of the belt and to complete the model of the belt going to realize the outer crown that would serve to be able to bring it to the correct thickness. for now the tooth is modeled only with the bottom starting from the neutral line, the same as I use to create the belt function

 

[LaboratorioDieci]

Intrigued by the exercise I made my proof. first I shaped the round strap, then I deformed it in the form of assembly

 

[Esselle]

Intrigued by the exercise I made my proof. first I shaped the round strap, then I deformed it in the form of assembly

seems a good system to verify tensions and encumbrances. will you also post the file?

 

[MassiVonWeizen]

You're wrong.
in the hinge function put the tick to create part
in the created part, which you can save externally wanting, models the belt band 0.5x15; you can do it as sweep or simply as extrusion in which width and thickness
models a tooth and impose merge result
use repetition on the tooth function curve
Those little nuances you initially noticed are there, but you can't see.
now in the axieme you can move the pulleys by enabling rotations in the belt function

 

[LaboratorioDieci]

seems a good system to verify tensions and encumbrances. will you also post the file?

I attach the deformation part and screen for those who cannot open itor model it directly with the shape mounted as Massivonwaizen says above

 

[scalva]

I didn't even know there was such a command

 

[Esselle]

Thank you! I didn't even know the existence of the "deform" command, I had to search and insert it in the bar!
How rich I am reading you, thank you!

 

[MassiVonWeizen]

I join you have thanks shirokko.
very interesting as a command

 

[LaboratorioDieci]

I join you have thanks shirokko.
very interesting as a command

In fact, in this case it can be not so useful. doing the repetition on curves as you suggested rather than my repeat circular the difference would have been minimal.
Besides, going to look closely the result of deformation, some defect there is...

 

[LaboratorioDieci]

in the previous answer I wrote that deformation introduces some defects. I found out it depends on a feature parameter that I used badlyby activating the "uniform" parameter, the command works more closely with regular surfaces, while deactivating it has a more "organic" result
the following example:

 

[MassiVonWeizen]

I attach a small set with the synchronous handling of the wheels. the strap remains firm and I don't know if it's possible to move it

 

[Stefano_GS]

You're wrong.
in the belt function put the tick to create part
in the created part, which you can save externally wanting, models the belt band 0.5x15; you can do it as sweep or simply as extrusion in which width and thickness
models a tooth and impose merge result
use repetition on the tooth function curve
Those little nuances you initially noticed are there, but you can't see.
now in the axieme you can move the pulleys by enabling rotations in the belt function

I've been working a little on the ass.
I still find a number of important issues.
until the creation of the belt function all right, the point creates part and everything is fine.
I extrude a tooth and problems begin when I repeat along the curve.
if I try to repeat the function gives me error indicating that not all instances can be created, then I use the repetition of the bodies.
the problem is that in the lower branch of the belt is as if the teeth were translated outward.
here is the file: external link for excessive file weight

 

[Stefano_GS]

I attach the deformation part and screen for those who cannot open it
or model it directly with the shape mounted as Massivonwaizen says above

Thank you very much, in general very useful command of which I completely ignored existence.
However, I just can't make it work with my proof.
Any ideas? Here is the file con link esterno