[sudo-access] [sudo-discuss] help build a motorized front-door opener for omni commons

robb sf99er at gmail.com
Thu Jan 19 16:30:11 PST 2017 

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 at 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,
>>> 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 at gmail.com
>>> >
>>> wrote:
>>>
>>> If you are working on RFID cards any possibility that the entrance to
>>>> sudo/ccl could get a card reader? Been wanting access control for
>>>> awhile.
>>>>
>>>> On Sun, Jan 15, 2017 at 11:46 PM, Jake <jake at 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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>>
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