Cam follower

[lumpycustard]

Hi,
i have drawn a cam and its follower and i cant seem to constrain it so that when the cam rotates the follower moves up and down.i tried the transitional constraint but it only seems to move across one face then stops at the different radius.any help thanks.

[shift1313]

do you have a spring pushing it back into the cam? Are you in the assembly environment, dynamic simulation or Studio?

[kencaz]

This would be a great use for contact solver in conjunction with a transitional constraint. make sure to round the push-rod or it won't rotate correctly.

http://www.imageviper.com/displayimage/144534/0/cam_constraint.gif

KC

[skurl]

hey people, i am new to this forum,but i would love to have some help, i want to know how to construct the basic auto cad drawing of radial cam, can anyone help me please!!

[shift1313]

Autocad and Inventor are totally different. Your question would be better answered in the Autocad 3D forum.

[lapachacha]

look what i intend to do is that i have two steel rods hanging from the ceiling.i need to shine a laser beam onto the bottom ends of the rods .now for this i have a small box(very light weight)(consider a shoe box) having a laser pen at the middle.the angular distance between these two ends of rods is 120 degrees as SEEN from the ground where this box is.so i need to give a 120 degrees rotation to the box to serve my purpose..dat is..first laser spot on the 1st rod then on 120 degree sweep..to the other end......i intend to have this done with a cam coupled with a stepper motor.

so for a cam rotation of ,say,90 degree,i want the box to rotate 120 degree(this is simple harmonic and a oscillating cam problem).i.e a rise of 120*pie/180*the length of the box=gives the chordal/arc lenght which gives the rise.and a 120 degree return stroke for a CAM rotation of 90 degrees.no dwell...this comes out to be 180 degree total..not closed.i.ee not 360 full degrees.

how to design the cam profile ? i have tried this on solidworks as it has a toolbox and cam templates but yet again i do not understand the nomenclature and input it requires from me..the terminology it uses just doesnt coincide with the conventional nomenclature of cams.

i want no grooves..no blanks..just wanna make a profile to my desired follower motion and dimension it n send to the manufacturing shop....

HEEEEEEEEEEEEEELPPPPPPPPPPPP!!!!!!