curve da equazione

[MARCOC]

Good evening to all, I have a question to ask you, linked to solidworks, because I should then use the command in question, but first I have to understand that curve comes out and I hope for someone to get a hand, because I just have no idea.
I have a circle that rotates on itself and at the same time advances, a point on its circumference that trajectory performs? ? ?
It can't be a cycloid because I would have the translation tied to the diameter.
Once this happens and then the mathematical function, I should use it in solidworks to get the curve.

Thank you very much

 

[muzzetto]

I'm a little rusty in math.
if however the radius circle r rotates on itself with angular speed w
and forward in x direction with speed v

(wt) + vt
y = r * sen (wt)

where the time passes.
attentive to signs and initial values.

Matteo

 

[MARCOC]

Thank you so much matteo, I can see how to make it solid, I still ask you one thing, the curve resulting from the 2 equations you know has a name? ? ?

 

[muzzetto]

for ludic purpose I prepared the excel file that calculates the curve.
Interestingly, depending on w and v, the geometry of the curve changes significantly.
I can't load it here because it has 'dangerous' extension.
If you give me a reference, I can email you the file.

I don't know if he has a name. call her muzzetto curve!

Good job!

m

 

[Biggmetals]

for ludic purpose I prepared the excel file that calculates the curve.
Interestingly, depending on w and v, the geometry of the curve changes significantly.
I can't load it here because it has 'dangerous' extension.
If you give me a reference, I can email you the file.

I don't know if he has a name. call her muzzetto curve!

Good job!

m

if you zip the excel file should let you load

 

[muzzetto]

There he is!

 

[ceschi1959]

and memorable così: d=50mm v=50mm/s w=1 series/s

 

[MARCOC]

What did you do with? ? ?

 

[ceschi1959]

What did you do with? ? ?

with nx, I will try also with sw but at the moment I do not have it available

 

[ceschi1959]

with sw 2017, I can't make it periodic and I put some parameters more or less randomly.. Hi.
c.

 

[MARCOC]

I have tried myself, same result, and more than nx, as you see the curve does not start from point 0 and later than the crusin,now I do other tests and try to come to head

 

[ceschi1959]

I have tried myself, same result, and more than nx, as you see the curve does not start from point 0 and later than the crusin,now I do other tests and try to come to head

to start from zero just remove the initial value from the equation of xt (5 in this case, which represents the radius of the circle). I still don't know how to make periodics with sw.
in the equations of xt and yt I put the value of 6.28 that approximates 2pigreco. in nx for the exact value of lazy just put pi() in sw is there any formula?

 

[LaboratorioDieci]

instead of 6.28 you can write more*2.
if you want more repeats increase t2

 

[muzzetto]

Good morning, everyone.
I was recalled by rocks because I no longer enriched this discussion, so here I am!
in sw you are all far superior to me, so much so that I did not know the 'equation curve'.
I experienced it, but he manages to draw only 'monoton' curves that sw calls non-autointersecting.

Unfortunately, the curve in question has three different behaviours:

- when v=w*t behaves like a circle rolling on a plane
- when v<w*t -="" autointerseca="" quando="" si="" v="">w*t manages to be monotonous, therefore representative on sw

I attach you some photos and the excel file that I 'adjusted' to make this clear.
I hope my contribution is helpful.
Matteo

♪</w*t>v<w*tv>w*t

 

[MassiVonWeizen]

if you can recreate it in excel you can try to curve through points importing coordinates from external filehttp://help.solidworks.com/2017/italian/solidworks/sldworks/hidd_curve_in_file.htm?verredirect=1

 

[LaboratorioDieci]

I did not try to create a curve from file, but both as a spline in sketch and as a curve for reference points the system does not accept self-intersecting curves.
I think that in fact in solid modeling a self-intersecting curve cannot generate much of usefulness.

 

[MassiVonWeizen]

Surely you can't build a solid with an intersecting curve, I doubt there's a cad that does.
Moreover, that curve represents a path and not an object profile.

 

[LaboratorioDieci]

Surely you can't build a solid with an intersecting curve, I doubt there's a cad that does.
Moreover, that curve represents a path and not an object profile.

you are right, but I noticed that sw is quite closed on the processing of concrete objects. That's why I'm shaking with bees to set more theoretical buildings.

 

[MassiVonWeizen]

What do you mean by concrete objects?
that curve for example if you realize it with a thread you can not make it two-dimensional, but it develops on 3 sizes. if you do it on 2 sizes equals a piece of iron cut to laser to decorate the house gate

 

[LaboratorioDieci]

Forgive me, I felt bad. I mean specialized.