Timeline for Practical setup to measure angular velocity
Current License: CC BY-SA 3.0
21 events
| when toggle format | what | by | license | comment | |
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| Sep 6, 2017 at 2:18 | comment | added | Floris | Related: physics.stackexchange.com/q/353795/26969 | |
| Mar 10, 2015 at 15:58 | history | post merged (destination) | |||
| Mar 9, 2015 at 19:47 | vote | accept | DK2AX | ||
| S Mar 9, 2015 at 4:56 | history | suggested | Ramrod | CC BY-SA 3.0 |
Fixed title
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| Mar 9, 2015 at 4:35 | review | Suggested edits | |||
| S Mar 9, 2015 at 4:56 | |||||
| Mar 8, 2015 at 22:43 | answer | added | ratchet freak | timeline score: 2 | |
| Mar 8, 2015 at 16:36 | answer | added | Emil | timeline score: 12 | |
| Mar 8, 2015 at 15:59 | comment | added | Air | The lesson here is: Don't take the advice of random users without checking for official guidance. Ideally, you would have deleted the question on the original site before it received an answer, or enlisted the help of a moderator to migrate the question here. Now we have two of the same question, answered, on two sites, which is not ideal but hardly the end of the world. Keep it in mind for next time and the moderators will handle it from here. | |
| Mar 8, 2015 at 15:46 | history | edited | Air | CC BY-SA 3.0 |
Instead of asking "is there a way" which is essentially a yes-or-no question, be direct: Identify your constraints and then ask how to solve the problem. Try to keep comments about the site out of the question itself; they are okay in comments.
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| Mar 8, 2015 at 15:44 | comment | added | DK2AX | Yes, I posted this question on physics.SE first and was advised to ask here on eng.SE. I was not sure if I have to remove the other question. Apart from that, I personally think the question gets more relevant answers on physics.SE since I was actually not looking for specific tools that measure such a speed, rather for "tricks" such as "tie a string to it to help count the number of rotations per time" or so. I certainly do appreciate the answer further down though, I actually did not think there was an off the shelf device for such a purpose. | |
| Mar 8, 2015 at 13:20 | answer | added | Olin Lathrop | timeline score: 7 | |
| Mar 8, 2015 at 11:58 | comment | added | Russell McMahon | ... OR you can get many ideas for building your own from here | |
| Mar 8, 2015 at 11:57 | comment | added | Russell McMahon | You can buy relatively low cost optical tachometers that work either with a reflective sticker or, in many cases, just enough optical variation per rotation. With some work you could make this $5 module work or you can buy complete ones like these from about $12 | |
| Mar 8, 2015 at 11:42 | comment | added | DK2AX | Yes, the top speed is hard to measure, but the average speed at the beginning of the spinning is what I was asking about | |
| Mar 8, 2015 at 11:41 | comment | added | DK2AX | Another idea would be to attach a string and to find the number of rotations in a certain time. The increased radius of the 'coil' might somewhat compensate the friction and slower angular speed. | |
| Mar 8, 2015 at 11:22 | comment | added | Demosthene | Technically, the top speed is achieved at the very beginning of the spinning; the spinning top's velocity then obviously decreases due to friction. So what you're going to measure is more of an average speed during a period of time that is "representative" of the top's rotational velocity without too much friction. The question is then, how do you determine such a period of time? | |
| Mar 8, 2015 at 9:51 | answer | added | Rob Jeffries | timeline score: 1 | |
| Mar 8, 2015 at 9:43 | answer | added | Ali Moh | timeline score: 1 | |
| Mar 8, 2015 at 8:50 | history | edited | DK2AX | CC BY-SA 3.0 |
added tags and fixed spelling in title
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| Mar 8, 2015 at 8:44 | review | First posts | |||
| Mar 8, 2015 at 10:15 | |||||
| Mar 8, 2015 at 8:43 | history | asked | DK2AX | CC BY-SA 3.0 |