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Homework Help: Scotch Yoke with dwell - design Q

  1. Mar 7, 2013 #1
    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
  2. jcsd
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