[Noisebridge-discuss] Bench Supply and Laser Cutter?

Zach organic_unity at yahoo.com
Sat May 2 07:25:27 UTC 2015


Damn, Adam it sounds like it would be GREAT to have you around for calibrating.  Any chance you could drop by NB sometime when I'm there and spread the knowledge?

Also, about the tools - there are ZERO needle nose pliers in the red bin.  I am very familiar with the red bins.  Woodshop yielded zilch too.  I mean, there are a LOT of tools missing.  just saying.

-Zach
--------------------------------------------
On Fri, 5/1/15, Adam Munich <adam at aperture.systems> wrote:

 Subject: Re: [Noisebridge-discuss] Bench Supply and Laser Cutter?
 To: "Torrie Fischer" <tdfischer at hackerbots.net>
 Cc: "Noisebridge" <noisebridge-discuss at lists.noisebridge.net>
 Date: Friday, May 1, 2015, 12:48 PM
 
 I have one
 of those full spectrum models ( its at Sudo room right
 now)  and it's not an incredibly complex machine. I
 would say that wiring up the laser tube would take only
 about 1 minute, the difficulty is aligning the laser there
 after adjusting all the mirrors.
 Last time I did this I used polycarbonate
 glasses ( which are opaque at that wavelength ) and a magnet
 over the safety switch sensor to make the machine think it
 wasnt open. I then held down the later test button and used
 a piece of cardboard to determine where the beam is and
 where it should go, and adjusted accordingly.
 If anybody wants to take a stab at it, doing it
 that way shouldn't take more than 30 minutes.
 On May 1, 2015 12:47 PM,
 "Torrie Fischer" <tdfischer at hackerbots.net>
 wrote:
 We've
 got a huge bin of screwdrivers in the dirty shop. Needle
 nose pliers
 
 tend to end up in the big red rolling toolbox.
 
 
 
 On Friday, May 01, 2015 01:07:06 AM Zach R wrote:
 
 > Thanks for info everyone.
 
 >
 
 >   That's great, I thought it was broken way
 worse.  I can bring my tools
 
 > over and look at it next week.  NOTE, we do not have
 ANY needle nose pliers
 
 > and the dozens of tools I donated last month (lots of
 screwdrivers and
 
 > such) were nowhere to be found on monday.  Makes doing
 these repairs really
 
 > difficult cause I have to bring my tools from
 home...just an fyi for
 
 > everyone to keep an eye on what we have.
 
 >
 
 > Do  you know more about the brass contact it uses? 
 Id be down to order
 
 > another on ebay rather than replicate / jerry rig
 something for such a nice
 
 > piece of equipment.
 
 >
 
 > -Zach
 
 >
 
 > Date: Thu, 30 Apr 2015 14:37:23 -0700
 
 > From: metatecque at gmail.com
 
 > To: tdfischer at hackerbots.net
 
 > CC: noisebridge-discuss at lists.noisebridge.net
 
 > Subject: Re: [Noisebridge-discuss] Bench Supply and
 Laser Cutter?
 
 >
 
 > I did a little maintenance on the laser cutter a year
 and a half ago, there
 
 > should be a brass connection on the left side. .. if
 you duplicate this
 
 > connection on the right you will be good to go, do not
 solder directly to
 
 > the tube, you can remove the rubber insulation on the
 right and solder a
 
 > brass crimp connector to the wire.
 
 >
 
 > Blessings,
 
 >
 
 > Hilaire
 
 > On Apr 30, 2015 12:04 PM, "Torrie Fischer"
 <tdfischer at hackerbots.net>
 wrote:
 
 > The laser tube needs wired up. It is sitting inside the
 tube compartment in
 
 >
 
 > the laser cutter itself. Thats about as much as I know
 :)
 
 >
 
 > On Thursday, April 30, 2015 07:29:48 AM Zach R
 wrote:
 
 > > Hey all,
 
 > >
 
 > >   It was great to see some of the old faces at
 NB on Monday.  We had
 
 > >   Michael
 
 > >
 
 > > L, Rubin, Jake, Miloh, Kevin and some other peeps
 of the OG variety
 
 > > holding
 
 > >
 
 > > it down !  Felt like old times :)
 
 > >
 
 > >
 
 > >
 
 > > Me and Jake took a stab at the blown bench supply
 that everyone was using
 
 > >
 
 > > for years (the 15V x2 output adjustable one). 
 It's seen a lot of use,
 
 > >
 
 > > love, and abuse and it would be nice to have it
 going again.  It has been
 
 > >
 
 > > moved to the hackershelves now since it was taking
 a lot of time to repair
 
 > >
 
 > > and it got late.  Here is the diagnosis I
 made:
 
 > >
 
 > >
 
 > >
 
 > > 1) both outputs are good voltage-wise and adjust
 properly
 
 > >
 
 > > 2) Current control on both sides is shot, appears
 worse on the left as it
 
 > >
 
 > > actually displays a negative number (hah) 3) I
 believe the current is
 
 > >
 
 > > controlled by 2 logic chips using a sense
 resistor.  Those chips are
 
 > > CD1044
 
 > >
 
 > > and CD4066 I believe. 4) I recommend replacing
 those chips and / or
 
 > >
 
 > > investigating the current control circuitry on the
 power converter board.
 
 > >
 
 > > 5) Note power converter boards have 2x pico fuses
 each that check out fine
 
 > >
 
 > > (they are yellow)
 
 > >
 
 > >
 
 > >
 
 > >
 
 > >
 
 > > And I've been meaning to ask: what exactly is
 wrong with the laser cutter?
 
 > >
 
 > > Does it need some expensive part?  I would LOVE
 to take a stab at
 
 > > repairing
 
 > >
 
 > > this since its one of the finest pieces of
 machinery we have at NB.
 
 > >
 
 > >
 
 > >
 
 > > Best,
 
 > >
 
 > > Zach
 
 >
 
 > _______________________________________________
 
 >
 
 > Noisebridge-discuss mailing list
 
 >
 
 > Noisebridge-discuss at lists.noisebridge.net
 
 >
 
 > https://www.noisebridge.net/mailman/listinfo/noisebridge-discuss
 
 >
 
 >
 
 >
 
 > _______________________________________________
 
 > Noisebridge-discuss mailing list
 
 > Noisebridge-discuss at lists.noisebridge.net
 
 > https://www.noisebridge.net/mailman/listinfo/noisebridge-discuss
 
 
 
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