Limiting the function operation 2

Frankyy · Nov 13, 2020

Hi, anyone know an idea how to limit this force function that it only works when the the slider is on the way back, in this mechanism?
I tried to use the "IF" function but I couldn't find a solution...
Maybe is some other way to implement this type of force?

Simulation:
[youtube yIXR2-MVyR8]

Force limit needed - black arrow mark:

Force function:

Force values / slider position:

GregLocock · Nov 14, 2020

what did your IF look like?

Cheers

Greg Locock

New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

Frankyy · Nov 14, 2020

I wanted to do it like in this example, insert DM (..., ...) instead of VR (..., ...) and then eliminate the force between the new markers added, in the unwanted range of that force

IF( DM(checkmarker1, checkmarker2) : 0 , 0 , AKISPL(DM(MARKER_18, MARKER_19),0, SPLINE_1,0)) or similar...

Sorry for my little knowledge, I am a beginner user of MSC Adams [hairpull2]

GregLocock · Nov 14, 2020

No you don't want to use DM in your IF test, you need translational velocity, assuming that all this happens on the X axis

IF( VX(checkmarker1, checkmarker2) : 0 , 0 , AKISPL(DM(MARKER_18, MARKER_19),0, SPLINE_1,0))

So this says if the velocity between those two markers is <=0, F=0
esle F=whatver your spline gives

The chances are you might need

IF( VX(checkmarker1, checkmarker2) : AKISPL(DM(MARKER_18, MARKER_19),0, SPLINE_1,0),0,0)

depending on directions

Cheers

Greg Locock

New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

Frankyy · Nov 14, 2020

I misunderstood this function. [banghead]

Yesssssss, it's work! [rofl2]

Thanks You for Your HELP! [thanks]

This Thread can be closed [smile]

IF( VX(CHECK_MARKER_1, CHECK_MARKER_2) : 0 , 0 , AKISPL(DM(CHECK_MARKER_1, CHECK_MARKER_2), 0, SPLINE_1, 0) )

[youtube 6zzJiS3OFXU]

GregLocock · Nov 14, 2020

Good job

Cheers

Greg Locock

New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

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Limiting the function operation 2

Frankyy

Mechanical

GregLocock

Automotive

Frankyy

Mechanical

GregLocock

Automotive

Frankyy

Mechanical

GregLocock

Automotive

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