My ShockDyno

[@tiitsaul9036]

This is incredible

[@MotoChassisByTonyFoale]

Glad you like it.

[@canberradogfarts]

Praise the gods you've made it thru covid AND ewe toob finally sent me one of ur vids

[@EVguru]

Always enjoy on of your videos. I really must put my dyno back together, it was only lashed up temporarily and the plots traced with the X,Y function of the digital scope. The sound was breaking up at some points and there were a couple of silent sections that it wasn't clear if they were intentional or not.

[@iancoulston6452]

@Paul Compton the video description acknowledges that the sound does drop out at times.

[@MotoChassisByTonyFoale]

Paul, I have added some links in the description to related stuff without the sound problem.

[@vpservice1016]

Is this software available to buy in the near future??

[@MotoChassisByTonyFoale]

Send me an email [e-mail]

[@AndyHack10]

​@@MotoChassisByTonyFoaleI've sent an e-mail aswell a few months ago, no reply yet.

[@virtualmarc2383]

I think of POTs as ridiculously inaccurate. couldn't you replace all your sensors with a rotary encoder like the one you put on your lathe? Run the string over a small pulley on the shaft of the encoder and calculate acceleration etc in the MCU.

[@EVguru]

Resistive sensors have been long used on professional damper dynos and indeed for live travel measurement on track. I've obtained very clean readings (in a different application) from pots with conductive plastic tracks. Metal film, or Carbon, not so much.

[@MotoChassisByTonyFoale]

Paul Compton pointed out that using pots for displacement measurement is a well accepted practice. As far as I am concerned the problem with any displacement sensor is when you differentiate the displacement to get velocity. Increased velocity noise cannot be avoided, it is fundamental to the differentiation of digital signals. Whereas using a velocity sensor the velocity gets integrated to get position and that operation reduces displacement noise. Unfortunately, the sound on the video was very bad during those explanations. I only use a displacement sensor when using extremely slow velocities to investigate stiction and friction. All other tests are done using an LVT. Here is a link to some measured results www.homemadetools.net/forum/something-completely-different-83989#post175969 and a couple of videos kzbin.info/www/bejne/qWHEhqN9pMp1f6M kzbin.info/www/bejne/hHTZfIWdl6tkq6M

[@virtualmarc2383]

@@MotoChassisByTonyFoale thank you for your detailed reply to my question. Your comment on differentiation and integration is well taken. And thank you for the links.