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  1. MotionGirl

    How do automation-based companies do full machine [kinematic] simulations and trajectory planning?

    There is a package that I am now using called MechDesigner. It allows you to simulate complete machines, with many axes or mechanisms, generally packaging or assembly machines, using full kinematic solutions rather than just 'solver' based solutions, with motion designs assigned to the relevant...
  2. MotionGirl

    Brake deceleration rate

    Nice to see SI units for a change. And yes, rb1957, I do get annoyed when term 'acceleration rate' is used instead of straight 'acceleration'. Acceleration rate would mean 'jerk', or the third derivative of position or angle etc. TwoBallCane - it is very common for objects to have acceleration...
  3. MotionGirl

    Bearings. Can Outer Race rotatation in housing be acceptable?

    Just a point - if the outer race creeps then it can be summized that the housing is not supporting the outer ring. This means the outer ring will distort, or not be quite round. This is NOT good. Outer rings can afford to be 'thin' because it is usually expected that the housing supports the...
  4. MotionGirl

    lost in a 4-bar slider design

    Ok, here is how the mechanism posted by the OP works (with artistic license) - a very simple 4-bar mechanism. Now the only question remaining is ... what does the OP need to do again? To me, the design is all but done in the 3D static CAD...
  5. MotionGirl

    static/kinematic analysis & synthesis

    BugE. You are right - I thought Forces were included as it promised on the old website. I for one am going to keep my eye on it as I know Camlinks was pretty useful and if this is going to be 3D version, then i'll be very interested.
  6. MotionGirl

    is this four bar linkage possible?

    In answer to zekeman, if I put it in to a 'cambox' where the OP could only see the input and output shaft, then he would never really know he had a 6 bar! I could be really sneaky and just tell him/her to never, ever, on the pain of death, open the box!!!!
  7. MotionGirl

    is this four bar linkage possible?

    OK here is a 6 bar linkage with an oscillating input of 180degrees with an output link rotating more than 180 and the transmission angles don't get that bad....that's in my humble opinion. Have I missed the requirements though, as I'm not entirely sure what is being asked for....LEt me now if...
  8. MotionGirl

    is this four bar linkage possible?

    Have I stopped the discussion...? Shall I try to model and animate what I mean?
  9. MotionGirl

    Software for Installation/Operation/Maintenance manuals

    Out on a limb here. I use Help and Manual... It is a help authoring tool. Deals with graphic easily and can publish to paper, ebooks, as well as the web, and normal help files. VERY similar to instruction operation and maintenance manual requirements...
  10. MotionGirl

    Sliding, Pivoting Joint design

    First of all, what are your criteria for success: Before a recommendation, one would need to know both static precision and the dynamic precision you would need. Statically, how much error in position could your design tolerate before it becomes inefective. Are there particular positions that...
  11. MotionGirl

    is this four bar linkage possible?

    I would do it with a 6-bar linkage myself. You would then be able to get about 220 degrees without any serious transmission angle problems...
  12. MotionGirl

    lost in a 4-bar slider design

    Btrueblood. 1 bar is always the frame in a 4-bar.
  13. MotionGirl

    L-shaped 6-bar linkage motion

    I would assume you know how to design a 6-bar mechanism with a traslating link? Because there is a method to do that. You first of all need to find a 4-bar with a coupler curve - or with part of a coupler curve that delivers your horizontal followed by vertical motion - I'd look for a 4-bar...
  14. MotionGirl

    Analysis for Impact vs Constant Force?

    Just for information: a body released from zero height (ie its weight is totally supported but is touching the surface just so) on to an elastic system (say a cantilevered beam) will deliver no "impact" (ie no diference in velocities) but will initially deflect the beam at twice the amplitude to...
  15. MotionGirl

    static/kinematic analysis & synthesis

    There used to be a package called Camlinks I used in the past. Very good for kinematics and forces (forces due to inertia and springs etc). Friction input was limited, but you could input a constant force if you wanted. I've just done a search on Camlinks and there is a product called...

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