What’s wrong with the strobe disc for checking the speed.
Often now finding a light source that’s flashing at 50Hz is hard to find. But the main point for me is it should allow me to measure wow and flutter and get rotation information that’s not limited by the test disks accuracy, and on tables without a arm fitted.
Had a look at the spec and cost on the clearaudio measurement equipment I have, the 300hz strobe and disc costs almost as much as the new fangled approach. ( I didn’t pay anywhere near the current prices) So if I was to buy again would probably go with the new technology. Which approach is most accurate is another question. I worked on a project 20 years ago where we were installing a satellite guidance system, it was accurate to xx cm in yy km. The issue was mounting the sensors accurately enough to each other to get within an order of magnitude of the sensors capability. This device looks like it would have similar challenges.
The benefit of measuring fluctuations over time independent of its accuracy is useful for picking up belt slip, motor clogging or flat spots on idler wheels.
vinylnvalves wrote: ↑Thu Feb 11, 2021 4:52 pm
What’s wrong with the strobe disc for checking the speed. On rim drives you can adjust it on the speed, belt drives are a more tricky situation if it’s an synchronous motor.
I found a strobe disc a pain in the bum with a Lenco. Dead easy with Nick’s supply of course.
Yes there maybe corrections logic now.. but machining accuracy and placement won’t be any different, we were challenged by the size of the vehicle which affected the accuracy of triangulation between the sensors. My point was this device looks small if the sensors where further away from the axis of rotation it would be more accurate.
We will see. They make a turntable, I suspect the device came from them wanting to measure their own product. W&F is problematic, I have several ways of measuring it ATM, but they all depend on test disks.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
Found out it’s not a good idea to block cloudfront.net. Why? ‘cause it pisses off the wife who’s kindle stopped downloading books and everything became ‘queued’ which resulted in a 30min call to Amazon support where her account subscription was suspended and cancelled as part of the ‘troubleshooting’ and then re enabled, a factory reset of the Kindle and loss of all her saved authors and an escalation to L3 support! It was only after we hung up waiting for the support guys to call back in the next 24hrs that it occurred to me that blocking Amazons content delivery service in PiHole may just be the cause! Doh!
