Inexpensive Accelerometer balancing, tool breakage, chatter detection

I was thinking about balancing a lathe chuck and ran into this:


Which reminded me of the programs on cellphones for doing vibration testing..

Which led to this:

www.memsic.com/Public/Uploads/uploadfile...PS-048-0072v1.2).pdf

The chip for these runs less than a dollar. I'm thinking one could find a way to make a standalone one for LinuxCNC - seems like many would buy one for balancing/tool breakage - chatter detection (could vary speed if vibration is detected.)

These use a SPI or I2C interface. 

I did a couple of quick searches here - didn't see where anyone else went down the same rabbit hole?
 

I had already done it at one time other then it was turned on and off with HAL pjns as I didnt know how to do m code stuff.
It would be on the maillist somewhere..

That's what I meant - I did build it into motion. I just didn't code a NML message to turn it on.

lrak wrote:

I was thinking about balancing a lathe chuck and ran into this /.../

Vibration monitoring would certainly be a nice feature. Since the chip you found has a max sample rate of 2 kHz it should be possible to get one sample per servo period. I haven't looked into it but the Mesa cards should be able to communicate via SPI (at least in theory; I haven't looked into actual support).

Great video link too - thanks!

good evening, some examples on dynamic balancing always around the ADXL335/345:
www.instructables.com/Simple-Rotor-Balancing-Machine/

I vote for a HAL component vs built in. Keep things as flexible as possible.

The problem of maximum flexibility is it is also the hardest to configure/.
By being built in, it would also standardize the g/m codes to use it.

I did find my code on a old disk drive. I'll have to dust it off and look at the code to see if it's worth moving forward with presenting to anyone.