Guess what this thing is  - Page 1
Forum section: electronics / general

author: turbo!
author_rank: Regular Contributor
timestamp: April 17, 2014, 12:14:11 pm
content: It's a linear motor. Who can guess the era, what kind and what it is used for?The magnets clam shell over the coil and the thing on the upper right is a back-to-back of IR LED and a dual element CdS sensor.

author: Stray Electron
author_rank: Super Contributor
timestamp: April 18, 2014, 11:15:28 pm
content: I haven't seen that one but we used something similar in the old Burroughs Corp. removable platter hard disk drives. Disks were 14" in diameter IIRC. Single platter drives were 5Mb IIRC. This was about 1977.

author: CaptnYellowShirt
author_rank: Frequent Contributor
timestamp: April 19, 2014, 01:44:58 am
content: A Flux Capacitor?

author: Skimask
author_rank: Super Contributor
timestamp: April 19, 2014, 02:57:17 am
content: https://www.google.com/url?sa=t&source=web&rct=j&ei=3-VRU5niMoamygHM24C4Dw&url=https://www.youtube.com/watch%3Fv%3D3WCvULMRUq8&cd=1&ved=0CCoQtwIwAA&usg=AFQjCNFramL46JglnSwLRyKJ1Dq3W6lFlw&sig2=ZGEeSEuMYR8aKseI3E10Tw

author: senso
author_rank: Frequent Contributor
timestamp: April 19, 2014, 03:39:19 am
content: High tech analog control flippers machine

author: FrankenPC
author_rank: Unknown
timestamp: April 19, 2014, 03:44:20 am
content: Quote from: Skimask on April 19, 2014, 02:57:17 amIt's not mine, I SWEAR!

author: SeanB
author_rank: Super Contributor
timestamp: April 19, 2014, 09:11:35 am
content: It is ok, I can send you some spare parts if you need them.

author: TerraHertz
author_rank: Super Contributor
timestamp: April 19, 2014, 11:51:50 am
content: High end 8" floppy disk drive head-seek motor?With the head assembly running on polished steel slides, with roller bearings.I'm only guessing this because I've seen a similar arrangement in a big hard drive, and that looks like an 8" floppy drive die casting.

author: turbo!
author_rank: Regular Contributor
timestamp: April 19, 2014, 07:55:21 pm
content: Quote from: TerraHertz on April 19, 2014, 11:51:50 amNothing to do with data storage.

author: NiHaoMike
author_rank: Super Contributor
timestamp: April 19, 2014, 09:12:44 pm
content: Some optical assembly?

author: TerraHertz
author_rank: Super Contributor
timestamp: April 20, 2014, 03:48:30 am
content: Those are definitely spring-hinges at left and right. So there's something off-frame below that moves back and forth perpendicular to the plane of the picture.Also the coil, if the magnets are mounted above and below it, will move perpendicular to the picture plane.If those two moving objects are interconnected, they'd probably be linked by some kind of lever-reduction linkage below. Which would suggest the purpose was to achieve very small but precise movements in one plane, while retaining rigidity in the perpendicular plane.How about... an LP record master disk cutting machine?

author: houdini
author_rank: Regular Contributor
timestamp: April 20, 2014, 05:07:39 am
content: part of a precision scale

author: han
author_rank: Frequent Contributor
timestamp: April 20, 2014, 08:57:09 am
content: Laser Projector?

author: turbo!
author_rank: Regular Contributor
timestamp: April 20, 2014, 09:22:13 am
content: Quote from: TerraHertz on April 20, 2014, 03:48:30 amYes to all, except the last one.Quote from: houdini on April 20, 2014, 05:07:39 amYep.The answer is magnetic balance cell. It works like a triple beam balance or mechanical balance in doctor's office. Instead of moving counter weights around to get it to zero, it pulls on it with an electromagnet.There's no pointer to show balanced, but it uses a light beam and a slit. A variable current power supply is used to achieve the needed force to balance it out. The current needed to achieve this point is used to determine the weight.The magnets themselves drift with temperature. The sensor within the magnet is used to compensate it.The whole deal is accomplished using a 1980s PID closed loop technology.

author: CaptnYellowShirt
author_rank: Frequent Contributor
timestamp: April 20, 2014, 07:00:31 pm
content: A Watt Balance!

author: turbo!
author_rank: Regular Contributor
timestamp: April 22, 2014, 01:18:02 am
content: Quote from: CaptnYellowShirt on April 20, 2014, 07:00:31 pmI just read this:http://en.wikipedia.org/wiki/Watt_balanceI think its a bunch of gibberish. It says it is a better version of ampere balance, but the description of operation tells me its the same thing.

author: Richard Crowley
author_rank: Super Contributor
timestamp: April 22, 2014, 01:25:20 am
content: According to their explanation, we (engineers, scientists, etc.) have electrical measurements (amps, ohms, volts, watts, etc.) down pretty well and we can precisely measure and reproduce them around our planet.So their scheme is apparently to transfer that knowledge and reproduciblity to the PHYSICAL world from our ELECTRICAL world where we apparently have it so well off. So they will ultimately be able to "define" a kilogram (for example) in electrical terms.At least that is how I understood it from a quick review.

author: turbo!
author_rank: Regular Contributor
timestamp: April 22, 2014, 05:28:26 pm
content: Here's a diagram of this unit I found online and the picture of the analogue guts that go with this sensor block.The parts in red circles are what you can see in the picture in first post.Diagram:Analogue guts:No idea what the National ME84202 is. Let me know if you guys know.