envelope sketch on cylinder

[cacciatorino]

I am doing tests with swx2009 for students: in particular, I would like to create a cam made on the cylindrical surface of a drum. first I created the sketch of my "developed" trajectory and then I tried to wrap it up.
if I use the command "project curve" the result is not the desired one (the projection is limited to 180° and also the orientation is wrong), if instead I use the command "wrap", the preview is correct, but then when I give the ok, I am signaled the error that, being the open sketch, the processing is not possible.

Once you get the sketch projection, I would use it as a trajectory to cut the profile for the roller. I attach my file made with rel.2009 for unemployed, as they call it on the site of swx! :biggrin:

p.s. I did a search in archive but I did not find suitable material.

 

[cacciatorino]

there would be this example:
http://www.cad3d.it/forum1/showpost.php?p=96269&postcount=4But it's not what I've been looking for, because by making such a modeling, the superifice is not the one of the roller envelope as it should be.

 

[sampom]

I am doing tests with swx2009 for students: in particular, I would like to create a cam made on the cylindrical surface of a drum. first I created the sketch of my "developed" trajectory and then I tried to wrap it..................... .
...... If instead I use the "wrap" command, the preview is correct, but then when I give the ok, I am signaled the error that, being the open sketch, the processing is not possible.

Once you get the sketch projection, I would use it as a trajectory to cut the profile for the roller. I attach my file made with rel.2009 for unemployed, as they call it on the site of swx! :biggrin:

Yes, the sketch is open (it is formed only by a line) and above all the development you assigned to the sketch does not correspond to the outer circumference of the cylinder (you made it a longer fur) and gives you also the error of "self-intersection".
then you the closed flaw sketch and its length/development relate to the circumference of the cylinder with an equation ♪ (for lazy use the exact one provided in the calculator of the equation window); thus it will always be correct and also parametric:smile:.
Look if that's what you wanted:View attachment Part1.zipthe cut you do it directly in the function coils Selecting the option incidere and assigning depth.
the sketch of the path you have made it turning into "axis line" your original sketch, then with entità di offset pull the external parallels by selecting bidirectional and assigning the width. selections again closed ends > linesOkay, and you've got your tight sketch of the correct length. then as you have already done this sketch you use it in coils and the result is the one above.

I hope I made myself understand, but I assure you that it is easier to make than to say:biggrin:

greetings
Marco:smile:

p.s. you also want to "take the ditch" and move to the other solid?

 

[cacciatorino]

then you the closed flaw sketch and its length/development relate to the circumference of the cylinder with an equation ♪ (for lazy use the exact one provided in the calculator of the equation window); thus it will always be correct and also parametric:smile:.
Look if that's what you wanted:

No, that's not good. geometrically it is incorrect, and you notice if you push very small values the diameter of the drum compared to that of the roller. What you get is not the envelope of a rectangle that runs through a curved trajectory, but only the projection of a 2d profile on a cylindrical superifice. We fall into the problem of the helical excavation already seen in the past.
what you have to do is draw the profile developed in 2d, wrap it on the cylinder and then use it as a path for the sweep excavation.

I hope I made myself understand, but I assure you that it is easier to make than to say

Your exposure is clear, but the solution is not what I was looking for.

p.s. you also want to "take the ditch" and move to the other solid?

a client asked me to do a job in swx, so as long as the cad seller doesn't send me the offer I'm starting to see how you work with this cad. Of course, if I go after everyone, I'll go to work just to pay for subscriptions... .

I honestly have no desire to spend money buying another license, it would be like having to buy a new car, because the one you normally use on the a14 for some strange reason can't circulate on the a1, I'll make two accounts as soon as the offers come.

 

[cacciatorino]

I picture what I want to get. I specifically put that the "tool" profile is a circle so as to make the winding solution untraceable.

 

[re_solidworks]

Hello hunter,

I would like to help you more at this early stage, but I am very tight with the times and do what I can.
It is evident that the open sketch is not wrapped, you could ask the solidworks to implement this function, I believe that there would be no problem, also because the preview already fused.
to solve the problem you can act in various ways. one is that of the file that I will attach to you tomorrow or Monday (when I go to the office), with which I used a closed sketch to track my trajectory, I converted to curve as much as I needed and then I did the same your path. Of course, it's a game to be limited, but it really costs little time.
You could also draw a sketch3d on the cylindrical face as a path.

 

[cacciatorino]

Hello hunter,

I would like to help you more at this early stage, but I am very tight with the times and do what I can.
It is evident that the open sketch is not wrapped, you could ask the solidworks to implement this function, I believe that there would be no problem, also because the preview already fused.
to solve the problem you can act in various ways. one is that of the file that I will attach to you tomorrow or Monday (when I go to the office), with which I used a closed sketch to track my trajectory, I converted to curve as much as I needed and then I did the same your path. Of course, it's a game to be limited, but it really costs little time.
You could also draw a sketch3d on the cylindrical face as a path.

Thank you for your attention.

3d sketch perhaps is not very suitable because then for the table it would be better to have the sketch developed on the plane to be listed in Cartesian coordinates rigged by polar cardssiane (i.e., quoti on the primitive diameter with a certain factor of scale such that at the end the total quota is 360 and not the real length).

I remember that Moldovakiller had posted a video to do as you say, but then he "obscured":http://www.cad3d.it/forum1/showpost.php?p=96462&postcount=8

 

[sampom]

Hello hunter,

I would like to help you more at this early stage, but I am very tight with the times and do what I can.
It is evident that the open sketch is not wrapped, you could ask the solidworks to implement this function, I believe that there would be no problem, also because the preview already fused.
to solve the problem you can act in various ways. one is that of the file that I will attach to you tomorrow or Monday (when I go to the office), with which I used a closed sketch to track my trajectory, I converted to curve as much as I needed and then I did the same your path. Of course, it's a game to be limited, but it really costs little time.

look if this can be a solution:View attachment AVVOLGI CAMMA.zipI have "recalcated" on the uphill and downhill ramps two spline making them tangent to the rest of the route that used in this way for the sweep cutting makes the surface continuous and usable for coupling cam. seems to work but I don't know if it's still what's required.

You could also draw a sketch3d on the cylindrical face as a path.

I thought about it too but I find it difficult to "wrap" the bows on the cylinder; re_ if you post an example of this would make a great pleasure..:biggrin:

greetings
Marco:smile:

 

[cacciatorino]

to solve the problem you can act in various ways. one is that of the file that I will attach to you tomorrow or Monday (when I go to the office), with which I used a closed sketch to track my trajectory, I converted to curve as much as I needed and then I did the same your path.

This solution is great, it seemed strange that swx could not do this.

 

[re_solidworks]

Hey, here's the cam as the hunter wanted.

 

[cacciatorino]

Hey, here's the cam as the hunter wanted.

We got together!

Thanks for the tip!

 

[cacciatorino]

look if this can be a solution:View attachment 12056I have "recalcated" on the uphill and downhill ramps two spline making them tangent to the rest of the route that used in this way for the sweep cutting makes the surface continuous and usable for coupling

I didn't understand, maybe you projected the sketch on the cylindrical surface though without wrapping it? so I think the cornerstone of cinematism would not be respected.

 

[cacciatorino]

a curiosity: do you normally open these files created with the student license? or is there a warning?

I saw that in prints he writes that it is an academic license.

ah, these files I load you don't use them to inherit them in professional material because I think they contain "tags" that identify them. . .

 

[re_solidworks]

I thought about it too but I find it difficult to "wrap" the bows on the cylinder; re_ if you post an example of this would make a great pleasure..:biggrin:

greetings
Marco:smile:

You must use the spline on the surface and you should first make points or where possible of the path pieces to lean on. is not so simple and varies from case to case.

 

[re_solidworks]

a curiosity: do you normally open these files created with the student license? or is there a warning?

I saw that in prints he writes that it is an academic license.

ah, these files I load you don't use them to inherit them in professional material because I think they contain "tags" that identify them. . .

the license I use is a commercial premium. I activated the second activation at home as permitted.
Basically for each license regularly purchased you can do two activations, until recently stated in the activation form where the license was in use (house or office).
This way a user can experience at home and work in the office. If you hire a person and you want to allow him to jail at home you can let him activate the license.
If you try to activate it a third time... attack you and tell you to turn off one of the other two before.
Maybe that's what you're using that has these limitations. You said it was "for unemployed," right?

 

[sampom]

the license I use is a commercial premium. I activated the second activation at home as permitted.
Basically for each license regularly purchased you can do two activations, until recently stated in the activation form where the license was in use (house or office).
This way a user can experience at home and work in the office. If you hire a person and you want to allow him to jail at home you can let him activate the license.
If you try to activate it a third time... attack you and tell you to turn off one of the other two before.
Maybe that's what you're using that has these limitations. You said it was "for unemployed," right?

I also (or rather, the company where I work :smile have a premium with the second activation "portable" at home. in theory you should use not at the same time (I declare that if I am now at home I can not use that in the office, but if by chance at this moment my boss decides to get out of the house and open the program that happens?:biggrin.

hunting is a free student who seems to have no great limitations since it opens and reads our files quietly. only that in the press appears the word "School license of swx only academic use". This happens to me if I mold his file.
when I open his file the system doesn't give me warnings but if I put it in a set then the warning message appears and in the tree in front of the file name an icon appears with the "touch" (the American hat by graduation:smile. . That's all.

quiet hunter that we will not use your files for work, even for a question of copyright :biggrin:.

greetings
Mar

 

[cacciatorino]

the license I use is a commercial premium. I activated the second activation at home as permitted.
Basically for each license regularly purchased you can do two activations, until recently stated in the activation form where the license was in use (house or office).
This way a user can experience at home and work in the office. If you hire a person and you want to allow him to jail at home you can let him activate the license.
If you try to activate it a third time... attack you and tell you to turn off one of the other two before.
Maybe that's what you're using that has these limitations. You said it was "for unemployed," right?

Yes, the double activation speech explained to me by the swx sellers, for me it is fundamental because I work half the time on the fixed and half on the laptop. I hope there's no trouble if one day I turn on the door in the office, but I don't think they're pulling ip addresses.
Maybe even those of solid edges understood such a trivial truth, but instead they force you to make mortal jumps to work in order.

I am using the "solidworks engineering stimulus package", which would be a version you can use for three months and that the swx has put in circulation for the designers fired for the big crisis and so they can have the chance to form on free swx. That's why I called it "unemployed version."
among the various limitations of use there are:
1) the question of prints
2) the program does not export to neutral formats
3) the produced files contain a watermark that should mark them as coming from a "free" version.

I'm beginning to see the welds, now that you are thinning the first mist actually the function looks very powerful, now I have to see a moment if you fit the particular situation I have to deal with with my client. I don't know if I can use them because they require a fairly distinct struttra, or if maybe you'd better use the configurations.

 

[sampom]

This solution is great, it seemed strange that swx could not do this.

But even what you have found still does not convince me;
if I put it together and I want to mate the "scanalatura" with a cylindrical tip I can't, it doesn't take me homemade (or does it in a strange way) cam. I still can't simulate the movement. Where am I wrong?

and also the "local" sections do not seem correct.. usual old cut speech in helical sweep:biggrin:

greetings
Mar

 

[cacciatorino]

quiet hunter that we will not use your files for work, even for a question of copyright :biggrin:.

even because in a week these examples will seem awfully trivial to me! :biggrin:

It seems to me that the program is very simple to learn.

 

[cacciatorino]

But even what you have found still does not convince me;
if I put it together and I want to mate the "scanalatura" with a cylindrical tip I can't, it doesn't take me homemade (or does it in a strange way) cam. I still can't simulate the movement. Where am I wrong?

and also the "local" sections do not seem correct.. usual old cut speech in helical sweep:biggrin:

greetings
Mar

I can't do it either. for that discourse of strange twists that makes the section "tool" during the scroll, try to check the option "vector.