Mates for V wheels rolling

[Sanghera]

Hi,
I was wondering what is the best way to mate a v-wheel to angle iron so that it can only run in the linear direction. I am having some trouble doing this. If you need the file I can post that as well.

[HuFlungDung]

Are you concerned about restraining the wheel from lifting? I suspect you might need a double track, basically, a square cross section set on its corner, with a wheel above and a wheel below.

If you mean the difficulties of locating a second parallel rail, also with V type construction, just use a flat track / flat wheel for the second rail.

FWIW, I don't really like the Vwheel track design, because it forces track or wheel wear. The V obviously has many different circumferences, which creates a range of circumferential speeds. Obviously the whole surface of the track moves past at one linear speed, so something has to got to give. I'm not sure if the wheel wears out, or the track.

[Sanghera]

Yes I want the wheel to roll along the angle iron. Just a mate with the V part and the 90 degree angle on the angle iron. I can get it to work with flats , like a bearing surface against a rail, but haven't managed to get that wheel rolling along. I don't want it to lift whatsoever. The wheel will probably wear first as I made it out of aluminum.
Thanks.

[Sanghera]

Here is what I'm doing.
Sanghera

[keebler303]

what you want is a tangent mate between the contact surface of the roller and the angle iron.

Matt

[Sanghera]

How exactly do you accomplish this. Which portions do you select? The angle face and the angular face on the wheel which will contact the angle iron?
Thanks.

[Sanghera]

It doesn't seem to want to work. I click on tangent, then select the two faces, not edges. Should I select two edges?
Sanghera

[JerryFlyGuy]

You should be able to select the sloped face of the wheel [ near where it is going to touch the angle iron] and then the face of the angle iron that the wheel [the face you selected] is going to sit on and it will offer you all the possible mate solutions, one of which is tangent. Do the same for the other side and your mated to the angle. I just did a test of it and it worked on my machine.

Also note, I don't select what kind of mate I want and then select faces, instead I select faces and it will pop up a little box showing all the possible mate solutions, sometimes there are lots of solutions, other times [ like this] there are only two.

Jerry
ps. the part and assm file is attached below.

[Sanghera]

Hi, can you send a file that you can open with 2005 version.
Thanks.

[JerryFlyGuy]

Actually sorry, I can't. I could save it as an Iges or something but that won't show the mates. It's pretty self explanitory if you go through it step by step. There should be no issues. The only problem may come from the groove in the wheel not being at 90deg. or possible the angle iron isn't drawn at 90deg [ the two faces] otherwise it should work.

Jerry

[Sanghera]

Okay, well in my drawing the v-wheel is drawn at 90 degrees, and so is the angle iron. I don't see why it is not working. I can only select one face on the v-wheel then I select the angle iron, and the only one possible is a tangent mate. I okay it and then when I try moving it it goes all over the place. Should I send you a file? Can you open previous versions?
Thanks.

[JerryFlyGuy]

Add a second mate to the opp side of the wheel and angle iron, this will lock it down to the angle iron. What you have now is the wheel locked to that plane of the angle iron, but it could be 10feet away in space, still sitting w/ the one side of the wheel on the angle iron. If you add the second mate then it has to sit on the angle iron.

Two mates required ... mate

Jerry