# Homework Help: Scotch Yoke with dwell - design Q

1. Mar 7, 2013

### chuffy

1. The problem statement, all variables and given/known data

I have to design a scotch yoke mechanism to be connected to a motor
See the below pic
http://www.bime.ntu.edu.tw/~dsfon/Mechanism/figure/intro02.gif [Broken]

The difference is I have to modify the slot to make the shaft dwell for 0.15 secs on the one extreme side (right hand side).
The motor output is 90rpm & is connected to the disk (part No.2) which has a radious of 50mm

I know the slot will have to be modified with a curve on the right hand side to make the shaft dwell. I'm not sure how you would calc this.

similar to this but dont think it's 100% right

2. Relevant equations

guessing some conversion from rpm to rads/sec is involved

3. The attempt at a solution

90rpm = 9.42 rads/sec the dwell is for 0.15 sec
I'm guessing you somehow work out what 0.15 gives and convert to a degree?

any help? thanks
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

Last edited by a moderator: May 6, 2017