sprocket LISP routine

[ledesmaf71]

I am looking for a lisp routine to draw custom sprockets. We are designing belt bottom and chain bottom trailers and am in need of several sizes of sprocket for design purposes.

 

If there is anything like this routine out there?

 

I have searched and have not come up with anything I can use. Right now I have to draw everything manually and it is very time consuming. I'm looking for something that will draw the sprocket for me by inserting sprocket diameter, pitch diameter, number of teeth, shaft sizes and etc....

 

anyway, I don't have much experience writing LISP routines and something this complex is beyond me.

 

I should mention I have researched the sites that have been discussed about sprockets from previous threads and, although some of these are close, nothing is what we need.

 

 

I thank you all in advance for your time and your assistance.

[fuccaro]

I did something years ago. I wrote a Pascal program to ask the user to select the sprocket chain's tip from a list and to enter the other data. The program generated a script file. That script file started in AutoCAD created the front and side view of the sprocket.

After that: I learned Lisp and I left the script files.

My program worked using the calculations according to the Romanian standards. For sure you use differrent formulas and only by luck you will find right the program you need.

I suggest you to write your own application. If Lisp or VB(A) is too much for you try to start with Excel. Enter the formulas and save the sheet. Just open it at any time, enter the data and let Excel to calculate the dimensions. This should speed up a litle bit your work.

[Mr T]

I have googled for this http://new.cadalyst.com/code/members/apr05.exe

 

I see you have autocad in your version, but do you have MECHDESKTOP as it has these built in ?

 

Nick

[ledesmaf71]

I have googled for this http://new.cadalyst.com/code/members/apr05.exe

 

 

Thank you, this helped. It is defenitely going to save me some time and that is what I am after.

 

I'll keep searching and if i happen to find what I need I will share it here.

 

thank you for your assistance.

[Ramu]

how to draw double sprocket in auto cad 2d(views)

[NaeKid]

I have googled for this http://new.cadalyst.com/code/members/apr05.exe

 

I see you have autocad in your version, but do you have MECHDESKTOP as it has these built in ?

 

Nick

 

I am also on the hunt for an "easy" way to draw up a chain-sprocket. I have an old motorbike that I need to put a new sprocket onto the wheel (worn teeth) and was thinking of making my own instead of trying to source something for it (and maybe play with the gear ratio at the same time for better highway power).

 

I clicked on your link and it looks like it is broken, but, that doesn't surprise me after all, it is 2 years old now.

[BIGAL]

Try searching for gear rather than sprocket I think I have seen something.

 

In simple terms a sprocket has a pitch between each roller centre, for a given number of teeth you get a pitch radius, at each sprocket centre you draw a circle "array circular" around the pitch radius the complicated bit is drawing a tooth shape its at a different radius but if you start at 0 angle should also be circular array.

 

I am sure there is technical details for sprockets on the Net. Basicly you can draw a sprocket manually as a first step then write a program.