View Full Version : What's this for?

3 Phase Lightbulb
01-17-2005, 07:29 PM
Does anyone know what this is for?



01-17-2005, 07:38 PM
Is this a test?

John Stevenson
01-17-2005, 07:40 PM
It's a left hand version of one of these.


John S.

01-17-2005, 08:26 PM
LOL... You guys. http://bbs.homeshopmachinist.net//biggrin.gif

Looks like a motor with an adjustable belt tension mount. (Like those found on drill presses.) The front motor mount and the shaft is missing though. http://bbs.homeshopmachinist.net//biggrin.gif

01-17-2005, 08:28 PM
It is a genuine dohickey doodad gizmo thingmajig whatchamacallit.

01-17-2005, 08:54 PM
Well, whatever they are the two of them make a set and have to be worth a whole lot more http://bbs.homeshopmachinist.net//biggrin.gif


01-17-2005, 08:59 PM
Gee, havn't seen one of those for years, they really work great!!

Doc Nickel
01-17-2005, 10:42 PM
If you had the other two, you'd have a full set of three!


01-17-2005, 10:49 PM
Mark 2 antigrav generator, not worth a whole lot since the mark 3 came out last month...

3 Phase Lightbulb
01-17-2005, 11:09 PM
It's just a little hard disk motor. When I say little, I mean little: http://bbs.homeshopmachinist.net//smile.gif


1979 IBM RLL Hard disk
Size: 12" x 12" x 20" 50 pounds.
Capacity: 64.5 MB.

And here is today....

2004 Hitachi SATA Hard disk
Size: 3.5" x 5" x 1" 30oz
Capacity: 400 GB

One of these drives is over 100 times faster, and is equivalent to a stack of the IBM drives 79 feet high by 79 feet wide:



01-17-2005, 11:21 PM
Ha!I got one of those old IBM units at work,sitting out in the rain!Want it for use with the other as bookends? http://bbs.homeshopmachinist.net//biggrin.gif

3 Phase Lightbulb
01-17-2005, 11:27 PM
<font face="Verdana, Arial" size="2">Originally posted by wierdscience:
Ha!I got one of those old IBM units at work,sitting out in the rain!Want it for use with the other as bookends? http://bbs.homeshopmachinist.net//biggrin.gif</font>

This one is actually the first "hard disk" with thin-film magnetic heads.

Do you know what the model number is for the one you have?


[This message has been edited by 3 Phase Lightbulb (edited 01-17-2005).]

01-18-2005, 12:42 AM
3ph,that motor must have SOME use.i assume it's fairly high speed,so how about a mini grinder?
alternatively,an anchor for a model boat? http://bbs.homeshopmachinist.net//biggrin.gif http://bbs.homeshopmachinist.net//biggrin.gif


01-18-2005, 12:59 AM
Hah. Want mini motors? I have a bunch of these but have never figured out a use for them yet. That is a .22 long rifle round for size.


[This message has been edited by Evan (edited 01-18-2005).]

J Tiers
01-18-2005, 01:25 AM
Geeminy....I remember when adapting a 5mb HD to your SWTPC 6809 system was pretty high tech, and who would ever use up THAT MUCH storage?

The SWTPC had 64K memory space, with hardware memory paging of several of those spaces on the processor board. I still have a SWTPC 6800 in storage, and a 6809 board that would fit it.......

01-18-2005, 01:58 AM
Even, They might be a tight fit, but drives for "N", "TT" or "OOO" scale model trains. They are too big for "Z" and probably under powered for "HO".

Forrest Addy
01-18-2005, 03:15 AM
The US digital PDP 8 I used on the Cordax CMM in 1973 has a 1 Mb hard disk (500 Kb on each side and you had to turn it over to access it) and 4k of RAM, you could open the CPU drawer and count the little ferrite thingies if you waanted to.

Cool stuff for the day. It had a crippled little programming language even a machinist could work with and boy did it make repeat part inspections a piece of cake. Probe trigger. Probe trigger. Etc. When you were done it would print out a report form giving you true size and location, in tol, out tol, deviation, best fit and lots of other cool stuff.

Primitive for now but then it cut about 60 hours off inspection for a batch of 24 submarine ball valve bodies compared to hand inspection and part documentation.

01-18-2005, 07:06 AM
The first language I used on a PDP 8 was DIBOL. DIgitals version of coBOL. We ran entire companies on a meg of disk, now my PDA has 128 times the memory.

01-18-2005, 07:35 AM
The disc in the hard drive work really well in a Telsa turbine.

01-18-2005, 09:23 AM
"64k should be enough for anybody!"

Bill Gates

01-18-2005, 10:53 AM
The first programs I wrote were on a Bendix G15. No language, no assembler, just octal double precision code. Vacuum tubes. 16 (sixteen) bytes of ram and 2160 bytes of "fast" storage on multichannel rotating magnetic drum.

3 Phase Lightbulb
01-18-2005, 11:57 AM
Actually, what's even more amazing is the microdrive technology that IBM initiated back in '98...

A microdrive is a little ~(1" x 1" x .25") CompactFlash form-facter drive (Internally all CompactFlash units implement the ST506/IDE signals and controller). A microdrive physically has a spinning platter inside. It's not flash based like the other "CompactFlash" devices. The inertia is so low, the platter spins up to full operational speed in half a second so you really only need to keep it running during access times.

This is what a microdrive looks like under the hood:


As you can see, these little disks are tiny. Even little Elvis from SNL would agree:



01-18-2005, 07:03 PM
<font face="Verdana, Arial" size="2">Originally posted by Evan:
Hah. Want mini motors? I have a bunch of these but have never figured out a use for them yet. That is a .22 long rifle round for size.


[This message has been edited by Evan (edited 01-18-2005).]</font>

Glue them to a stick,add some Dremel cup brushes and presto,industrial grade electric toothbrush http://bbs.homeshopmachinist.net//biggrin.gif

01-18-2005, 10:08 PM
Hey, I helped design the test equipment for those little Seagate drives! Didn't expect to see them here.