julia

Belt/chain: how to make the belt adapt to the pulley moved sideways?

Question by julia

Hi, I'm new to the community. :) So thanks in advance for any replies.
Yesterday, all day, I searched on web for any answers and found nothing that would help me. I hope in your advice.

I'm trying to make a belt - pulley system through the belt\chain function.
I aligned two pulleys vertically and added a distance mate beetwen their axes. (fig 1)

If I shorten or lengthen the mate distance, I see the belt adapt to the new position.
However if I move one pulley sideways - left or right - the belt doesn't follow. (fig 2)
Since I'm still not sure where exactly these two pulleys will be put in another assembly file... I'd like to make the belt completely adapt to the pulleys' position. In alternative I'd have to wait till the very end to add the belt :(

Also, since I needed the belt to have a trapezoidal section, I checked the 'Create a new part' button in the PropertyManager of Belt/chain. Sometimes the belt section, swept along the belt/chain creted path (fig 4), has a strange behaviour (fig 3). I believe it's due to the fact that the belt sketch isn't conditioned to the path position. However I have no idea how to correct this. In fig3 all I've done is move sideways the pulley.

ps. fig1 and fig2 are the same file. fig3 and fig4 are from an older file. That's because I tried to understand - through making a new assembly file (fig 1 and 2) - when previously mentioned problems show up.

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2 Answers

julia
Answered on 8 Nov, 2014 07:02 PM

Thanks for the video. it did help me to correctly attach the belt sketch to the path. So one problem less :)
Contrary to what it may seem, I did look youtube videos and tutorial. I just avoided titles focused on Motion Study, perhaps wrongly.
Usually in these tutorials the pulleys are pulled closer or farter apart, without changing their alignment. Do you, perhaps, have any suggestion in regards to the problem of changed alingment, too?

 
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john fall
Answered on 8 Nov, 2014 02:49 PM