Animation / Time

[Anonymous]

Hi guys,

I am currently designing a flow wrapping conveyor system. At the end of the system is a crimper style cutter. I want to show this crimper 'cutting' between the packs...but... I am struggling to put accurate time readings in to my timeline. For example, i can only specify seconds to one decimal place. I need to be able to input data up to 4 decimal places. How do I go about doing this?

I can easily input values of up to 4 dp but Inventor seems to overwrite this and round it to 1 dp

Thanks,

Paul

[JDMather]

Perhaps if you have Inventor Professional with Dynamic Simulation - you can enter as many time steps as desired and export the simulation to Studio.

[Anonymous]

Unfortunately, i do not have dynamic sim. I am using Autodesk Product Design suite 2015

[sam_m]

As a thought - could you slow everything down by a factor of 100 and then speed it back up after rendering?

Or, to ask a different question, how are you expecting an animations rendered at 20-30 fps to show this movement?  20-30 fps means each frame represents 0.05 to 0.0333sec, which is still a lot longer than your 0.001s timing - so, do you need the animation to be timed that accurately?

If your process is so critical it's down to 1000th of a second then I'm assuming the animation isn't that long...

ie.  If you want something to happen at 0.001s and something else at 0.003s then could you pretend that's at 0.1s and 0.3s instead?  And, if something is needed at 1s then it's now at 100s.  But, that's where I assume you're not expecting to show something down to the fractions of the second in ralations to multiple seconds, as sitting for 100s for each real second is crazy.

And, you're still back to the same problem when sped back up to real time - that 0.001s timing might now be rendered, but how are you going to play it back?  That means you need a 1000 fps display...  how can you see or even get your brain to process that movement unless it's all slowed down anyway?

[Anonymous]

I am trying to rotate a gear like system to do the following....

0deg to 90deg (0s to 0.125s)

90 to 270 (0.125s to 0.45s)

270 to 286 (0.45s to 1s)

286 to 360 (1s to 1.175s)

Then hold for 0.075s 

[JDMather]

The basic problem seems to be that you want to show motion that occurs in less time than the human can perceive - there is really no point in doing that.  In effect, you need a slow motion action.

[sam_m]

multiply all times by 4, then it's:

0 - 0.5s

0.5 - 1.8

1.8 - 4

4-4.7

hold for 0.3

So, it's now all in Inventor with no time being more than 1 dp.

render at 25fps and then adjust playback to 100 fps (with a avi fps converter, or a video editing package) to get a final video 4 x the speed.  (or render at 6fps and convert to 24fps to prevent a massive file-size).

possibly a little around the houses (and I admit I've not tried it myself) but should work 😉

... but, as mentioned before, I think you're not going to notice the accurate times/movements when played back at full speed.  How can you notice a hold for 0.075sec???  Even slowed down 4 times you're only looking at a hold for 0.3s which is tiny when you think about it.

[Anonymous]

Yeah thanks for the help. Agreed it is a little long winded and something I am in the process of trying. I had just hoped Inventorcould provide an easier solution