Repairing a JET AFS-1000B

Gearing up for the woodshop sawdust-fest that is the result of last minute holiday gifts, my trusty JET AFS-1000B air filtration unit bit the dust (yes, pun intended). Hanging above now is a useless box of steel, mocking me as a cough out some of the larger particulate matter swimming happily in my shop.

As the unit isn’t really that complex of a tool (filters, motor and glorified time / speed setting on / off switch) I took the opportunity to take this bad boy apart before tossing it to the curb. In short, a 5$ capacitor fix care of fixya community seems to have addressed the problem.

STEP ONE: Unplug the unit and support it on a table.

STEP TWO: remove the controller board from the exhaust side of the unit by unscrewing the screws holding the cover to the unit. Unplug the motor wire harness by pressing down on the white retaining clip. They go only one way, but it doesn’t hurt to note which is which.

STEP THREE: Unbolt the ground wire from the face plate and the whole board should come out. Unscrew the four screws holding the PC board. Look for a little foam pad that will drop out. Remember where to replace it. Screws and capacitor may have blue locktite on them.

STEP FOUR: Find the capacitor. It’s the part that looks like a tootsie roll, black with two wires coming out one side. It’s between the CPU chip and the big red square block. If it looks bloated, burnt or melted, you found the problem. Replace it with a 1000 microfarad (1000 uf/ 10 volt) ten volt capacitor with a radial lead. About $5 for the part at most electronic parts stores. Careful desoldering the old capacitor to avoid damaging the PC board. WATCH THE POLARITY. There is a negative and positive side. The negative side has a chevron (<) mark and is marked on the PC board. On mine the negative side was nearest the black micro chip and the positive side was towards the red JEFU MPE part. Use a little bolt-tite on the screws of the PC board and some on the capacitor on the PC board to limit vibration. Reinstall the board, plug it in and give it a whirl.

If no joy, STEP FIVE: Find the motor start capacitor. It is bolted near the motor, black about 1x 2 x 4 and has two red wires coming out of it. Take a battery operated resistance meter on a setting of R x 100 or higher. Charge the capacitor by connection one lead of the tester to one red wire and the other lead to the second red wire. You may have to strip the wire to make contact. Next reverse the leads and you should see the needle jump. Do it a third time incase the first try was discharging. If no needle jumping, replace capacitor. Couldn’t find this locally. May have to by directly from JET Tools. L

Recommend you hard crimp wire splices if cutting off the motor capacitor. . You can check the windings on the motor too. Check for continuity between the white-yellow-blue-black wires of the motor harness. Any combination should work. If not, motor shot, time for some bigger bucks repair.

Bingo! In my case the problem was on the PC board and the capacitor in question was 2200 uf x 10V but the process was the same. A quick ebay search, a patient waiting of 3 days for the capacitors to get here and a 15 min soldering job later and I’m back in business. Now I’m one step closer to giving gifts this season and and breathing easier (literally) in the process ;)

an embeddable exhibit

This week the NDIIPP partners meeting, the Library of Congress is holding a Recollection workshop to demonstrate some of the capabilities this platform provides to the digital preservation community. In addition to being able to connect / upload / transform various different data formats as well as allowing users to build various interactive exhibit interfaces on top of these data sources, Recollection allows these interfaces to be embedded in various applications.

Here is an example view of the NDIIPP partners data (managed as an Excel spreadsheet) available in Recollection and embedded here in WordPress.

My spreadsheets have never looked so good ;)

freemix

FReemix

Tonight we tagged a svn “invitational beta” branch for next weeks Freemix launch at 2009 SemTech. This is a huge accomplishment by an absolutely extraordinary team.

While there is still a lot of work to do (this is only the beginning ;) ), this marks an important milestone toward making it easier for people, communities and organizations to reuse, view, and share relevant information.

Wouldn’t it be nice if your data had friends, too?

Morning Song

by Sylvia Plath

Love set you going like a fat gold watch.
The midwife slapped your footsoles, and your bald cry
Took its place among the elements.

Our voices echo, magnifying your arrival. New statue.
In a drafty museum, your nakedness
Shadows our safety. We stand round blankly as walls.

I’m no more your mother
Than the cloud that distills a mirror to reflect its own slow
Effacement at the wind’s hand.

All night your moth-breath
Flickers among the flat pink roses. I wake to listen:
A far sea moves in my ear.

One cry, and I stumble from bed, cow-heavy and floral
In my Victorian nightgown.
Your mouth opens clean as a cat’s. The window square

Whitens and swallows its dull stars. And now you try
Your handful of notes;
The clear vowels rise like balloons.

ngozi

Ngozichukwunyerem … The name means “The gift God gave me back” in Ebu.

And while i’m not sure how yet to pronounce it, its definitely one of the most beautiful words I think I’ve ever heard.

woohoo!

happy birthday RDF!

Misha pretty much summed it all up in his post

The RDF Model and Syntax Specification became a W3C Recommendation nine years ago today!

Resource Description Framework (RDF)
Model and Syntax Specification
W3C Recommendation 22 February 1999

http://www.w3.org/TR/1999/REC-rdf-syntax-19990222/

Best wishes to all members of the original W3C RDF Model and Syntax Working Group and to all those who have built on top of the foundations we created.

Seems like only yesterday ;-)

active purls

Stu Weibel’s post on ‘List Making Meets Redirection’ prompted me to comment on some of the Active PURL work (PURLs with associated services) we at Zepheira has been developing. Example ‘Active PURLs’ might be notification to publishers of problems with target URLs (basically a link-checker for PURLs), notification to readers of updates to target PURLs (a “what’s new” feed for PURLs), etc. More specifically the architecture allows for an open marketplace to grow around such associations with PURLs (or PURL patterns) and services.

While I only touched briefly on this work in my comment, David Wood has expanded on this in his blog and given additional context on the potential business applicability of this approach.

Perhaps the most interesting use of Active PURLs to enterprises might be the ability to provide standardized RDF metadata about SOA Web Services as well as relational databases. UDDI is so broken, we might as well fix it with existing SemWeb standards. That is not a new idea, but the application of Active PURLs to the problem is.

Applying the lessons and standards of the web back inside the enterprise makes sense for managing evolution, supporting collaboration and more effectively delivering products and services. More and more businesses are starting to realize the true benefit of being *in* the Web, not just on it.

Flashing back on HTML

Following a web of circuitous links in the process of explaining to my son what a computer *not* connected to the Web might be, I stumbled upon some of our early working group notes discussing the finer points of initial HTML specification. Scanning the minutes I found it interesting to note the original cast of characters:

HTML-WG Meeting
Monday, Oct 17, 1994, Chicago World Wide Web conference.

Attendees

Eric Sink            (Spyglass)
Stuart Weibel        (OCLC)
Eric Miller          (OCLC)
Yuri Rubinski        (SoftQuad)
TimBL                (W3O, CERN)
Tom Magliere         (NCSA)
Ron Daniel           (Los Alamos)
Dave Raggett         (HP, UK)
Roy Fielding         (UC Irvine)
Phillip Hallam-Baker (W3O, CERN)
Liam Quin            (SoftQuad)
Corp Reed            (Cold Spring Harbor Lab)
Mitra                (Mitra Internet Consulting)
Murray Maloney       (SCO)
Bill Perry           (Spry)
Terry Allen          (O'Reilly Associates)
Thomas Churchill     (EIT)
David Land           (Verity)
Jeff Sutor           (UCLA)
Jon Bosak            (Novell)
Chris Wilson         (Spry)
John Punin           (RPI)
Dave Hollander       (HP)
Jim Seidman          (Spyglass)
Larry Jackson        (NCSA)

- My son’s response to this particular page was simply: “Hey! Two Erics!” (here is the other one and he’s not a legend)