roller chain lsp

[mgervais]

Hey there,

 

I found an awesome sprocket lsp that works perfectly and now am wondering if there is a roller chain one that anyone knows of i cant seem to find one.

 

Thanks

[MSasu]

If anyone is interested in doing this exercise, it will be very helpful to post the sprocket routine since some calculations/variables from it can be used in chain elements draw.

 

 

Also, it may help to ask a moderator to move your thread to AutoLISP area of the Forum for a better visibility.

[mgervais]

DJG_RCSprockets.lsp

 

theres the sprocket lsp i found. Or routine? Not sure the lingo as i just started using auto cad yesterday.

 

Thanks!

[fuccaro]

Thank you Mircea, the thread is moved.

[BIGAL]

To draw a chain need to work out first principles the pitch is the centre distance between links so you need a centre point on sproket 1 leaving and a centre point sprocket 2 enter the tricky bit is then to work out the multi link pitch length the chain will not be straight one or both sides unless you want to complicate even more with top and bottom runs and adjust one of the sprockets by tightening the adjusting screw.

 

Scenario 1 fixed sprocket centres take length between divide pitch and add 1 then work out a cantenary arc such that pitch chords = length of arc then just insert link blocks. if you draw a couple of sprockets the maths should fall into place.

 

Scenario 2 draw line from shaft centre to top and bottom tooth rotate till angles are = from horiz do for other sproket move 1 till pitch length works out. Then just use array to draw links hint ucs ob first.