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rotary damper

Valued Contributor
Valued Contributor

I'd like to add damper effect to the rotary load.

This 2nd line(under) can't transmit Torque. 0Nm

What is the wrong point?

5 REPLIES 5

Re: rotary damper

Siemens Phenom Siemens Phenom
Siemens Phenom

It looks all ok except that the rotary inertia has some endstop.

Go to the inertia and change endstop to "none".

Re: rotary damper

Valued Contributor
Valued Contributor

Thank you Emmanuel san,

I'd like to move rotary within 0~20degree.Is it possible?

For the moment,I change the endstop "none" 

(RL24-1⇒MECRL0A)

but rotarydamper Torque has still 0Nm.

 

Re: rotary damper

Siemens Phenom Siemens Phenom
Siemens Phenom

My apologies Naoki san. The endstop is ok then.

The issue is that both sides of the damper are connected to the rotary inertia, so the torque is R*(V1-V2) and both velocities are the same. You need to ground one end of the damper:

image.png

Re: rotary damper

Valued Contributor
Valued Contributor

Thank you, It works well.

Originally, Performance analyzer said Rotaryload consums a lot of Cumulative contribution.

I found osilated torque was input to rotaryload , So I tried to reduce osillation by damping effect like this.

But caliculation speed didn't improve.

Could you give me advice for this issue?

Re: rotary damper

Siemens Phenom Siemens Phenom
Siemens Phenom

Difficulty to give good advice without the model, but you can try:

  • change the damper coefficient value: 1, 10, 100, 1000...
  • If you still have the endstop, it may be that the load is always bouncing on one of the endstop, you can also switch the endstop to 'elastic' and adjut the damping coefficient of the endstops:image.png
  • In the Performance Analyzer, also check the Discontinuities panel. If you have a lot of discontinuities in a short time it will also slow down the calculation. If the issue is with the endstop you should see that the rotary load is triggerring a lot of events. Maybe somewhere else in the system...

 

If it fails, don't hesitate to share your model with the support line.