Bolt & Nut screw Mechanism...,

[Dhanasekar]

How to establish Bolt & Nut Screw Mechanism for the below model using PRO-MECHANISM,


Those highlighted in,


Yello color is Screw threads


Green color is BOLT


Red color is NUT.


=

Many Thanks

=


N.Dhanasekar


View attachment 3081

 

[rcg137]

Set up a cylinder connection, and two servo motors, 1 for translation and 1 for rotation. See the following link for a more detailed description.


[url]http://sharptechdesign.com:8888/Tutorials/Mechanism_WF2/MDX_ WF2_Lesson10.htm[/url]


Hope this Helps

 

[Kaz Z06]

A helical datum curve on one part and a point on the other will allow you to


construct a "slot-follower" connection which will give a more realistic joint.


You will only need to define a rotatiional servo to create motion. If you create


the geometry properly, your pitch will vary with these changes and your


slot-follower will be updated automatically.


Cheers
Edited by: Kaz Z06

 

[Dhanasekar]

Thanks for both of you, for your comments.


I couldnt connect that Link, can send me the downloaded pages in PDF form, if I give you my mail ID.

 

[magneplanar]

FYI

the link posted above goes to a site that does not open if you have certain settings. you can go here and click the links to a mirror site. however, the linked models and images will not download

http://sharptech.freeprohost.com/Mechanism_WF2/MDX_WF2_Lesso n10.htm

this question was posed in a similar way in this link:

http://www.mcadcentral.com/proe/forum/forum_posts.asp?TID=32 431&PN=2

rack and pinion was suggested...

Cheers

M

 

[ralexy]

[No message]

 

[karalici]

Hi ralexy,



Can you, please send me the file you shown above.



my E-mail is : [email protected]



Thanks

 

[Dhanasekar]

HI Ralexy.., u have done a good job.


I am new to Mechanism.


I had problem in creating helical datum curve.


I solved the equation for helical curve & got the points, then created datum points to create a datum curve.


Doubt:1 How to create a helical datum curve?


Doubt:2 For slot follower should I assign a servo motor?





I tried like this..,


View attachment 3096

 

[magneplanar]

Dhanasekar,

try putting the "point" on the moving part and the "helical curve" on the fixed part. You can see that in the animation from ralexy ( curves on the threads )

I did a similar assembly and found rack and pinion to be, in my opinion, a simpler method to achieve the same results.

cheers...

M

 

[Dhanasekar]

M,


can u pl explain me in detial


sorry

 

[magneplanar]

Hi Dhanasekar,

In mechanism you do the following: ( as was told to me on here)



"I would not use slot followers if you do not have to! If you only
create a cylinder connection, the motion can be prescribed by a gear
pair. Use a 'rack & pinion' gear pair, which requires you to
define both a linear and a rotational axis. use the two axis from the
cylinder, and set your stops in the same place. I'll try to make a
demo model to explain it better.


-ecosgriff"this person also posted a model in the thread from the link I posted above. There is obviously more than one way to do this since the link from Ralexy shows a nice model too.

see what works for you...

cheers...

M