camma a tamburo

[MARCOC]

Good evening to all
in recent days, I was trying to model a drum cam with inventor 2018
but I can not get a correct profile of the route
I'm wrong.
I have with inventor no you can get the real result
Does anyone know how to solve??? ? especially knows how to make a cam with correct mathematics? ? ?

 

[welcome to the machine]

inventor I don't know him, but I did so many drawing the track first on the floor, extruding the width of the cam follower or slightly more and then wrapping it on the defined diameter. after which Boolean subtraction from the cylinder.
it works because then these geometries I passed them to the cam and everything turns without games and impurities of the pin even at important speeds ( 1,5 m/sec) for the math of the profile I use a polynomial of 5° on excell and amount the function to create the median line of the cam on the cad. or define the fundamental points of the path and throw a spline. Of course the success entirely depends on how you were accurate in defining accelerations, pressure angles, bends etc., but I don't think you're asking this. Yours seemed like a modeling question.

 

[MARCOC]

exact...I care that the modeling is correct...I do so with inventor,I wind up on the cylinder the eztern lines of my track(which I disgnated on a sketch) then I create 2 surfaces sweep using the lines wrapped, and finally I divide the cylinder...but the result is not correct

you wouldn't have a step model to post? ?
so that it can compare the cut compared to that chd I get?? ?

 

[welcome to the machine]

Yeah, I'll find him tomorrow and send him to you. Sometimes I do not dig the track in the solid because the machine tool at the bottom is enough the line of the track center and then adapts the game of the quarry with the function of compensation tool ray, but on some cam a little more...datata, I definitely find the full representation with the quarry . if you want I send you also the laws made with excell.

 

[MARCOC]

thank you very much welcome.... thank you....but you with what program do model 3d? ? ?