19 Jan
2017
19 Jan
'17
4:30 p.m.
view from above
\
X \
X \
X \
X \
_____X________
===----
what about using our actuator & assembling a scissoring mechanism poorly
illustrated above?
===___ = actuator
X = scissor arms
\ = door
_ = wall above door
On Thu, Jan 19, 2017 at 3:23 PM, Jake <jake(a)spaz.org> wrote:
note: this email goes to four lists. Please reply
only to the Access and
Building lists to avoid clogging Omni and Sudo lists with this thread.
I just want to bump this thread and see if anyone is available to work on
the
physical aspects of the door opener I describe below, and as shown in this
diagram:
http://spaz.org/~jake/pix/omnidoormotor1.png
I am willing to do the electronics part of it and make it work with our
existing system, but I would like others to help with the building of a
bracket
to hold the motor in place over the door, and the woodwork and nuts&bolts
of
making the 2x2 stick with steel cable attached to it.
-jake
On Tue, 17 Jan 2017, Jake wrote:
the wheelchair motor that Robb wanted to use for a projection screen
raise/lower thing is something else.
The motor I want to use for the front door opener is this one:
http://imgur.com/gallery/MLuT7
it's in sudoroom in a milk crate. Robb and I remove the wheel and the
tire,
and now it's ready for the motor to be mounted on a bracket that will
hold it
in the right place, which is slightly higher than the top of the door, and
basically 2' south of the door's hinges.
then, a 2x2 of wood will attach to the top corner of the door with a
hinge, and
it will have a cord of this rubber-wrapped steel cable (which I have) go
from
one end of the 2x2 to the other, taking a couple of turns around the motor
wheel. It will look like this:
http://spaz.org/~jake/pix/omnidoormotor1.png
as you can see from this diagram, when the motor turns its wheel
clockwise (as
viewed from above) the 2x2 stick will be pushed in the direction that
opens the
door. If it's not clear, the rubber-wrapped steel cable (shown in
red/black
stripes) is attached to the 2x2 stick at both ends, but it makes a couple
of
turns around the wheel of the motor on its way.
anyway, i chose this motor because when it's not being energized with
electricity, it's free-moving which means it won't interfere with regular
door
movement. But when we activate it, it will be strong enough to open or
close
the door as we tell it to do.
The issues you mention about battery backup are not a problem. We
already have
a battery backup for the front door card (and soon RFID) access system,
and
this motorized thing will be battery-backed as well.
I am willing to do the electrical part of this project, and I have already
acquired the rubber-coated steel cable and motor, but I ask that other
people
take care of mounting the motor on a suitable frame above the door and
help
make the 2x2 stick on a hinge which will attach to the door.
I will be at sudoroom tomorrow night (tuesday night at 7) in case anyone
wants
to meet with me about this.
-jake
On Mon, 16 Jan 2017, David Keenan wrote:
I remember hearing about that wheelchair motor -- if it's the same one,
sudo-discuss mailing list
sudo-discuss(a)lists.sudoroom.org
https://sudoroom.org/lists/listinfo/sudo-discuss
last I heard Robb had wanted to use it to
raise/lower a projection screen
for the stage..? So I didn't think of it for this project, but if we can
use it and save ourselves some money, that's great!
I realize you may have already considered this aspect but as a DIY opener
will also need to comply with code requirements, do you think you can
design a system measurably compliant with:
- opening / closing force (<5lb) and speed (max. *N* seconds to close)
requirements throughout the swing, during automatic operation and manual
operation per ANSI/BHMA A156.19 for low-energy-operated doors, ICC
A117.1,
ADA and whatever may be found in CBC?
- req'd UPS / backup battery power for opener, for *N* many operations
(need to look it up)
- compliant location of upper and lower door actuators (buttons), assume
this will be no issue
If it's helpful, here is a decent article I found that glosses the
subject
of codes for low-energy openers:
http://www.constructionspecifier.com/understanding-new-acces
sibility-requirements-for-doors/
<http://www.constructionspecifier.com/understanding-new-acce
ssibility-requirements-for-doors/>
Given the above, and I realize I only now just brought this up to you,
but
I guess my only concern about any DIY implementation is, if you / access
group has the time to implement it relatively soon..? E.g., do you think
it
might be possible to complete in the next 2-3 weeks or so..?
I realize perhaps that is an unfair question to ask before you've really
started hacking on it, but I'm also trying to be realistic and pragmatic
wrt to how busy everyone is and the understandably extended timelines of
volunteer labor in general that comprises the bulk of omni efforts --
If after reviewing the door req's, you think a DIY system is doable in
the
next 2-3 wks, let me know how / when I can help hack on this and I will
follow up with you and access control group directly -- and perhaps we
can
set a date to meet up about it?
Best,
David
On Mon, Jan 16, 2017 at 12:20 AM, Maureen Muldavin <muldavin.m(a)gmail.com
wrote:
If you are working on RFID cards any possibility that the entrance to
access mailing list
access(a)lists.sudoroom.org
https://sudoroom.org/lists/listinfo/access
_______________________________________________ sudo/ccl could get a card reader? Been wanting
access control for
awhile.
On Sun, Jan 15, 2017 at 11:46 PM, Jake <jake(a)spaz.org> wrote:
> i brought in a wheelchair motor a while ago that I think could be made
>
into
> a
> power door-opener pretty well.
>
> I can work on a proof-of-concept for that and then be able to show you
>
what
> I
> mean, and then we can see if it will be good enough for our needs as
>
opposed
> to
> spending $2800 on a "proper" door opener.
>
> as for the RFID cards, Alex and I have been working on implementing the
>
card
> reader thing for a little while and I think I can add it to the front
>
door
> pretty relatively easily.., and I guess i'll do that first, rather than
> trying
> to do a storage closet first?
>
> as always, if anyone wants to participate in this process they should
> definitely jump in, otherwise it's subject to my chaotic schedule.
>
> technical questions about making this happen should be sent to the
> access
> list
> and possibly the sudoroom list, but probably not the building list as
> it
> will
> be a major distraction if we get into the weeds of microcontroller
> boards
> and
> door server code...
>
> also, yes I do have the box of RFID stuff you ordered and i've been
>
working
> on
> it~
>
> -jake
>
> On Sun, 15 Jan 2017, David Keenan wrote:
>
> Hi Jake / access control folks -
>>
>> So now that our front door is publicly labelled as accessible, we need
>>
> to
> install an automatic door opener & remote button (kickplate &
>>
> hand-height
> or a long bar) to make it legal.
>>
>> Reason I bring this up to you guys is, the opener system will need to
>> integrate into our existing/future access control somehow. The quote I
>>
> got
> is $2800 (50% parts, 50% labor) for a package including the Open Sesame
>> Model 233 (brochure
>> <http://www.opensesamedoor.com/index_htm_files/open_sesame_
>> brochure.pdf
>>
> ,
>
>> spec
>> sheet <http://www.opensesamedoor.com/index_htm_files/specs_model23
>> 3.pdf
>>
> ),
>
>>
>> made in San Leandro.
>>
>> Also, some of us met last week re: sketching out Omni's accessibility
>> plan,
>> and Yar suggested this might be a good time to also implement RFID
>>
> system
> for the front door, if that was possible? In part because, proximity to
>>
> an
> RFID fob is more accessible than a card swipe which (after thinking
>>
> about
> it) I realized requires a pincing motion that is likely not ADA...
>>
> because
> of the excessive door opening pressure and iffy slope on the front
>> landing,
>> we need an RFID & auto-opener.
>>
>> So -- I'm not sure if any more work has been done on the RFID systems
>> I
>> put
>> in sudo a little while ago (stashed in under-stair storage area),
>> might
>>
> it
> be possible to integrate these into the door opener? I note in the
>> brochure
>> they offer a keypad access option - perhaps an opportunity for
>> 2-factor
>> authentication like Marc had talked about? Anyhow what do you guys
>>
> think?
>
>> I apologize for not helping y'all more with a better access control
>>
> system
> (helping spaces post-ghostship consumed my bandwidth), but as there is
>>
> now
> renewed pressure I want to help as I can. Would installing a trial
>> RFID/throw on the Omni Office for example still be helpful towards
>>
> getting
> this nailed down? Lmk
>>
>> Fwiw - I see the opener as pressing at this point not just 'cause its
>>
> long
> overdue, but because every day our front door is labelled as accessible
>> when it's technically not, is actually a not-insignificant liability
>>
> issue
> (accessibility lawsuit). Plus of course, we are still under scrutiny by
>> the
>> city, nimby neighbors trying to call us out for bogus reasons, etc
>> etc.
>> And
>> per building code the front door must be made fully accessible before
>>
> any
> other accessibility work starts on the rest of the building - at some
>> point
>> an inspector's gonna notice since they all go through that
>> door..anyhow.
>>
>> Let me know how myself & those of us working on accessibility might be
>> able
>> to help -
>>
>> Best,
>> David
>>
>>
>
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