Holy DFC Batman...

[Shredd]

   Take a gander at this...  Being a big believer in using DFC's when comparing changes in limb shapes, I think he may have hit this one out of the park... I wonder if he could set that up to get readings at each inch...  This technique also allows for the least amount of hysteresis while taking down data...

https://www.youtube.com/watch?v=teMO9oCl4YE 

[Mad Max]

Everything is getting Hi tech. these days

[Roy from Pa]

I dunno...

Guess I'm old fashion....

[Flem]

Holy OCD. Actually thats really cool. I can see how that could be very useful, but there's a lot of gear beyond the little Arduino unit to make that work.

[Shredd]

I dunno...

Guess I'm old fashion....

   Naw...  Your just Old...   

[Roy from Pa]

LOL smart A$$....

[Pat B]

That too is old.   

[avcase]

I just started playing around with one of these Arduino boards a few weeks ago for measuring strain on bow limbs and material test samples. They are incredibly capable devices and very inexpensive. It is funny because I was looking for a decent distance measuring sensor to use with the Arduino to measure draw force curves, and I happen to see your post with this video. Cool!

It would take a little programming, but the device could be much more automated, along with generation of various stats like total stored energy, stored energy to pounds draw, etc. There are even blue-tooth add-one that you could use to beam the results to your phone.

Thanks for sharing this
Alan

[Mad Max]

Cool stuff

[ztontonz]

Definitely interesting. Do you know if he is selling this device??

[Shredd]

He just made  the first one...  Maybe down the line but I think you will need a consistent way to draw the bow as he does...

[ztontonz]

Why?? I thought that his device was recording draw weight and distance datapoints at the same time. If it's the case you actually don't need to care about drawing consistently

[Shredd]

Something tells me that a nice, even steady draw will give you the best results and most accurate numbers...

[Mad Max]

[williwaw]

Will you tell us more about the bow, a pic maybe?

[Shredd]

Now that is a perfect example of a inaccurate DFC...  Dots going one way and the line going another...  And the numbers are all rounded to the half pound... 

[Roy from Pa]

We are trying to learn something here and you got to make ignorant remarks like that?

[Flem]

 Holy Smackdown!   Glad I don't know squat about DFC's

[jess stuart]

That is a very interesting DFC it stores a ton of early draw weight (energy).  Only builds 2# per inch the last couple of inches.  95% efficiency I would guess pretty quick.  Not sure I would like the feel of the draw cycle but would like to try it.
Max is it one of your statics?.

[Shredd]

We are trying to learn something here and you got to make ignorant remarks like that?

What you'll learn is how to make an inaccurate DFC...