[Noisebridge-discuss] Bench Supply and Laser Cutter?
Adam Munich
adam at aperture.systems
Sun May 3 21:32:58 UTC 2015
Hah, well I'll be back in the bay later this week. I'm not actually a
member of NB, but if fixing stuff is required, that's my thing :-)
Cheers,
-Adam
---
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On Sat, May 2, 2015 at 3:25 AM, Zach <organic_unity at yahoo.com> wrote:
> 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
>
> >
>
> >
>
> >
>
> > _______________________________________________
>
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>
> > Noisebridge-discuss at lists.noisebridge.net
>
> > https://www.noisebridge.net/mailman/listinfo/noisebridge-discuss
>
>
>
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