12 Jun
2022
12 Jun
'22
1:14 a.m.
The exhaust duct for the laser cutter is definitely not working. I am in
sudoroom with someone who is cutting plain simple wood, and it's killing me.
It's someone I invited to do the cutting so i'm putting up with it but I am
eager to leave and get some fresh air. We definitely need to improve the
ventilation situation somehow.
1. There is definitely leakage around the fan output, spraying smoke into the
room before it even goes into the exhaust duct. It's basically a mass of duct
tape because someone who was very desperate to laser cut stuff to sell on the
street wanted to just throw more tape at the job until it sort of worked. We
need to measure the diameter of the fan output and the diameter of the duct,
and buy the proper adaptor (or 3d print it???)
2. The exhaust duct has holes in it. They have been taped over and I don't
feel any leaks there, but it's definitely something to look for and fix
properly.
3. the interface of the duct to the hole through the skylight is suspect! It
was installed by someone I personally know to sometimes half-ass things (me)
and it has not been inspected since 2014. It's a 1/4" thick piece of wood
that's simply pulled up against the skylight hole and could be leaking there.
We need to go on the roof and check on that.
4. even if all the above are perfect, the smoke will be exiting just above the
skylight and could be very well getting sucked back into the room from the top.
We should build an exhaust stack a few feet high to make sure the fumes
go...away.
I would say that presently the laser cutter's exhaust is so insufficient that
people should not be using it until it's fixed.
-jake
On Fri, 10 Jun 2022, Arthur Ulfeldt via sudo-discuss wrote:
this is a 12 inch plastic duct. it appears to be
sufficiently attached. the
big hole in the side not notwithstanding ;)
non conductive ducts don't need grounding.
On Fri, Jun 10, 2022 at 1:23 PM mark burdett <mfburdett(a)gmail.com> wrote:
I found some articles online about laser cutter
exhaust and it says check
the manufacturer's specs to make sure airflow and pressure is maintained
(e.g. use 6" duct if it's too long for 4" to do the job). Use aluminum
tape
not duct tape for sealing the metal duct (i.e. the stuff you see on HVAC
systems which is not duct tape, confusingly) - the duct by the way should
be grounded.
--mark B.
On Fri, Jun 10, 2022 at 11:56 AM Arthur Ulfeldt via sudo-discuss <
sudo-discuss(a)sudoroom.org> wrote:
I'm reluctant to agree to not work on
something until an undefined
condition is met. let's improve this together 😊
what does better look like, what does good enough look like? is it
already good enough with the repair from last night?
fre. 10. jun. 2022 11.37 skrev Delta Ark <arikalinowski(a)gmail.com>om>:
I'd love to know what you find/what you make
of the venting system once
you take a look at it, could you update us/me when that happens?
Would it also be possible to have a moratorium on using it until the
venting is checked out/checked off on?
Again, tried to just accomplish some software work there yesterday, but
it wasn't really possible...
On Fri, Jun 10, 2022 at 12:10 AM Arthur Ulfeldt <arthur(a)ulfeldt.com>
wrote:
> next time I'm there I'll try to give the vent a proper fixing if nobody
> gets to it first.
>
> tor. 9. jun. 2022 22.20 skrev Arthur Ulfeldt <arthur(a)ulfeldt.com>om>:
>
>> I arrived at 8:30 and used the laser cutter. (i made a box yay!). i
>> think i was the second one to use it this evening. before i started i fixed
>> a big tear in the vent duct with what duct tape i could find. though i
>> didn't find a roll of it (I'm new here).
>>
>> it wasn't too smoky as i was using it, though i could still smell it.
>> if there's more duct tape applied i think it will do wonders for the air
>> quality. when i arrived, i suspect nearly all the smoke would have been
>> going into the room.
>>
>>
>>
>> tor. 9. jun. 2022 21.38 skrev Andrew R Gross via sudo-discuss <
>> sudo-discuss(a)sudoroom.org>gt;:
>>
>>> I agree with your assessment and would like to see sufficient
>>> ventilation implemented. What is the status of the blowers? What is the
>>> flow rate of fumes through the duct and out of the building?
>>>
>>> *Andrew R Gross, (he/him)*
>>> 412.657.5332 - shrad.org <http://www.shrad.org>
>>>
>>>
>>> On Thu, Jun 9, 2022 at 8:59 PM Delta Ark via sudo-discuss <
>>> sudo-discuss(a)sudoroom.org> wrote:
>>>
>>>> 👋
>>>> hi everyone,
>>>>
>>>> I'm starting to work at sudo again (after a very long hiatus)
>>>> (mostly evenings, 6-12, m-f). I'm currently working on some game,
>>>> ai and architecture stuff, you can see it here:
>>>> https://www.instagram.com/p/CelEcmAlsaq/ Very pumped to get back in
>>>> the space and see what people are working on and doing.
>>>>
>>>> Nonetheless, I have some concerns about the laser cutter. Today, the
>>>> laser cutter was being used, and, well, it, to my mind, smelled up sudo
>>>> pretty significantly. I think you could also even smell out in the hall.
I
>>>> guess what I'd like to know is (a.) can we prevent this somehow?
and/or
>>>> (b.) can we have a laser cutter moratorium until we know why this is
>>>> happening?
>>>>
>>>> I could be wrong, but I believe that improper ventilation of a laser
>>>> cutter can be both long-term toxic and even short term life-threatening
(if
>>>> someone is cutting something really wacky, which I don't think is
what was
>>>> happening today; I think someone was just cutting wood, hopefully not
>>>> laminated in any weird way).
>>>>
>>>> Anyway, yeah, I have to defer to people smarter than me on the
>>>> above, but something was off today in the way the machine was working
(this
>>>> was about 6pm); and, personally, I found it kind of spooky. Thanks for
your
>>>> thoughts/help/ideas/etc.
>>>>
>>>> Best,
>>>> AK
>>>>
>>>> --
>>>> Ari Kalinovski (They/Them)
>>>> Delta Ark Studios <http://delta.center/>
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>>>>
>>> _______________________________________________
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>>
--
Ari Kalinovski (They/Them)
Delta Ark Studios <http://delta.center/>
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