Sector67 is a non-profit collaborative space in Madison, WI dedicated to providing an environment to learn, teach, work-on, build, and create next generation technology; including software, hardware, electronics, art, sewing, metalwork, apps, games, etc.

If you’re in southern Wisconsin feel free to get involved; come by for a tour on Fridays, sign up for meeting announcements, or check the calendar for upcoming events.


You can join our (virtual) monthly meetings – always the 1st Tuesday of the month at 7PM. Information to join is shared on our mailing list a few days before the event, just click request to join group to receive e-mail notifications. The monthly meeting is set up as a 7 minute show and tell, you’re welcome to share a project you’re working on/completed/etc. No sales pitches please.

We’ve reopened to new memberships (see About page for more information) for anyone who’s fully vaccinated [shot(s) + 2 weeks], please contact us with information about your needs and we can go from there. Otherwise if you need support or assistance on a project please feel free to reach out to “team AT sector67 . O R G” and we’ll see what we can do to help you. We’re able to make some of our resources available outdoors or perform work for you depending on your needs. You can provide financial support for our organization, we appreciate the community’s support over the past year!

Posted in Uncategorized

DIY Powered Air-Purifying Respirator (PAPR)

We’ve been noodling on a variety of Personal Protective Equipment (PPE) we could help with. There’s been a big push internationally to try to replicate existing PPE like 3D printing N95 masks and attempting to clone forced air breathing systems – the challenge with these efforts is they’re starting with an item that was designed for mass manufacturing and trying to go back to DIY fabrication methods. Jim went back to the drawing board to try to come up with the least expensive off the shelf parts PAPR he could come up with:

The basic components are a political sign, a 2 liter bottle, 3D printer centrifugal blower fans, a power tool battery pack/adapter, and an off the shelf HEPA rated vacuum cleaner filter. While this isn’t the most beautiful creation, it fits the basic requirements of a PAPR in filtering air around your head and keeping contaminates away. One of the things missing is the hose – it’s hard to source breathing rated hose and nailing the flexibility and smooth interior walls is difficult. If you use off the shelf hose it off-gasses plastic additives forever, it’s what keeps the hose flexible.

We’re using:

  • A Milwaukee Tools M12 heated jacket adapter as a convenient way to convert the bare pack into a 12V power source (bonus feature, you can charge your phone while you’re using it! /s) You can also run an M18 pack if you use 24V fans with this adapter.
  • Coroplast, this is cheap polypropylene or polyethylene corrugated sign board, you can find one curbside (look at it this way, you’re still advertising for them) or pick up a sheet from Home Depot to make a ton of these from. Any fabric or compliant foam works for the gasket around the neck.
  • You can purchase PETG as a sheet/or in a roll form as PVC, or you can use a clear 2 liter (or larger) bottle, you’ll need to adapt your coroplast cutout to match your “window” size.
  • We chose fans we had handy, these are 50x50x15mm 3D printer hot end cooling fans, they’re commonly available in 5V/12V/24V. We used 24V fans as they’ll run on nearly any power tool battery you have available. You cannot use standard axial square fans, they will not drive enough flow with any restriction or backpressure from the filter or user. Don’t used brushed DC fans, they generate ultrafine carbon dust you don’t want to be breathing.
  • Filters are widely available as long as you don’t search for the same thing everybody else is – don’t look for N95, look for HEPA vacuum filters, Miller welding PAPR filters, etc. You need to get something that’s rated at 99.97% filtration HEPA, not all HEPA filters are the same rating. Ideally purchase a PAPR filter, they’re NIOSH (breathing) rated, but a vacuum cleaner filter will still carry a recognized rating. Vacuum filters can’t be used for a mask because they’re too hard to breathe through, fortunately you have a fan doing the breathing for you.

Main improvement would be to use a hard hat as the frame so it transfers the load off your shoulders and centers on your head. We wanted to use off the shelf and widely available materials but there’s obviously room for improvement.

If they’re helpful you can see teardowns of:

Miller 235672 PAPR / OTOS AirWings I pictures and circuit boards

3M Versaflo 300 pictures and circuit boards

Posted in Uncategorized

PAPR Hood->Hose Adapter

Continuing our pandemic saga, a local hospital needed a PAPR hood adapter to transition from a plastic “cloth” hood to a 3M Adflo PAPR hose. They’ve been taping the corrugated hose to the plastic hood flap but they need to be able to reuse the hood and sanitize the hose, all of which are a lot of work that can be avoided with a simple cleanable adapter.

The easiest approach would have been 3D printing these, because the hood is under positive pressure any leakage should be pushed outwards. There are a few issues though:

  • The only printers we have available are FDM, meaning we’re printing them standing on end so the layers are aligned with the tension load of the hose/hood, the potential failure mode is a shear across the layer which would be catastrophic
  • FDM printers have high porosity, much larger than the particulate we’re trying to block. Although when the hood is powered it’s under pressure, there may be exposure to a hazardous environment when the blower is off (power runs out, it’s been removed for storage/etc), meaning we could be absorbing particulate then blowing it into the user’s helmet when it’s powered on again
  • 3D printing at accelerated speeds yielded about an adapter every hour and a half, we needed to make at least 32 of them and possibly more with a goal of a few day turnaround. Although we have a large farm, this is still a lot of print time and post-print cleanup
  • 3D printing leaves a lot of sharp/hard edges from stringing and layer to layer bonding. We don’t want to have our adapter damage/abrade the hood or we’re causing more harm than good
  • We love 3D printing, but it’s sometimes not an appropriate application beyond prototyping. . .

The first step was trying to ascertain the scope of the challenge – quantity, turnaround, cost, etc. In this case the desired cost was zero, quantity high enough to merit some optimization, and the turnaround fast. We tried to hunt down a model and once we figured out the model of the hose (3M Adflo) it was quick to find this adapter on Thingiverse. The hospital didn’t have a working caliper but via some pictures with a reference ruler in frame we were able to confirm the dimensions were in the ballpark:

The next step was brainstorming available materials. The OD and ID matched up reasonably well with 1-1/4″ schedule 80 pipe, but on a weekend it wasn’t feasible to pick up thick wall plumbing pipe as all the true plumbing supply stores were closed. We stumbled around for a bit until we realized that a 1″ schedule 40 pipe ID was still great, but if we glued a coupler onto the outside it’d get us up to the OD ring size we needed to get the hose coupler to lock.

A run to the hardware store yielded plenty of fittings:

We weren’t sure how to couple to the hood, we thought a slip ring to a taper lock would work well and wouldn’t require tools or any other supplies so we printed a sample:

The parts locked together well so we we moved to a PVC version next on a manual lathe. The PVC taper was too slippery to lock on the fabric, so we went back to the drawing board to eventually settle on a zip tie approach.

Next step was to generate a file in Fusion360 that we could use to run our Tormach 15L CNC lathe to make a prototype. Fortunately PVC cuts well and we had hammered out a practice adapter on the Adflo end in about 2 minutes. (starts off a little furry, chipbreaking plastic is hard to do grabbing a thin pipe). This was version 5 for anyone keeping track:

This part was tested on the PAPR hose, unfortunately these are in such demand that they can’t be taken from the hospital for fit so we have to run prototypes back and forth. The tapered nose was determined to be a little too big so we revised it and also dropped the narrow ring, it wasn’t serving any purpose on the coupling.

After 7 versions, we were ready to make a pile of them, easy enough just rinse and repeat right? We forgot one of the annoying parts about PVC pipes – the socket joints like to push out if you don’t hold them together tightly after gluing them, the coupler has a reduced center to keep you from pushing the pipe in too far, and the solvent needs to flash off for a least a day before we start cutting them or they turn into melted plastic on the lathe!

Onwards to a resolution, the first to set up the manual lathe to blast out the coupler center ring:

Of course PVC pipes aren’t meant to be turned/centered, so the middle isn’t quite in the middle of the coupler making an interesting time trying to turn them, basically we inserted the boring bar to the middle of the coupler, then brought it straight out until we cut a band in the middle to remove enough of the pipe stop.

Then we needed to batch out enough pipes to length on the circular saw:

Then we brought it all together with an arbor press and a lot of clear primer/cement

After gluing them went into a vise to hold the pieces together long enough that they were set in position, it turns out having 6 vises in the welding shop is sometimes very handy.

The next step is to flash off the remaining glue in the industrial oven at low temperature, doing so we can accelerate the drying rate to just a few hours.

Then it’s on to the CNC lathe to first cut the hose coupler side

Then flip to cut the hood zip-tie slot and rinse and repeat until we’re done a few hours later:

Design files are on Thingiverse, we hope the nurses have an easier time with their equipment as a result of this work!

Posted in Uncategorized

COVID-19 Activity

You can join our (virtual) monthly meetings – always the 1st Tuesday of the month at 7PM. Information to join is shared on our mailing list a few days before the event, just click request to join group to receive e-mail notifications. The monthly meeting is set up as a 7 minute show and tell, you’re welcome to share a project you’re working on/completed/etc. No sales pitches please.

5/22/2020 we will remain voluntarily closed until late spring/early summer 2021. Please get yourself vaccinated so our community can recover and reopen faster! If you need support or assistance on a project please feel free to reach out to “team AT sector67 . O R G” and we’ll see what we can do to help you. We’re able to make some of our resources available outdoors or perform work for you depending on your needs. You can provide financial support for our organization while we remain closed, we appreciate your support and we will see you on the other side!

Please keep yourself and your family safe, the less transmissions that occur, the less overloaded our healthcare providers will be. Even if you are young you are still at risk yourself and more importantly at transmission to those you are nearby. Please keep our community safe and follow government guidelines (and common sense when those are in opposition)

We were happy to play a small role in assisting Dr. Alison Craig with her droplet barrier.

Thanks to a generous die donation by Plastic Ingenuity we have a die cut pattern for Olson face masks as well as square masks (that require two 9″x4.5″ and one 9″x7″ pieces). Many thanks to our SASY Neighborhood Association for sponsoring this Dane County Mask Makers to purchase more materials and elastic – please reach out to them directly to request mask donations.

We’ve cut over 15k+ mask patterns so far!

If you’re interested in having us cut material for you we need you to prepare it so we can cut it quickly:

  • Please prewash and dry (shrink) your fabric so the size won’t change when it is washed (if you don’t mind, we don’t need it prewashed)
  • The die will cut one pattern for both sides, if you’d like correct patterns out for both sides then you must fold the material at least once so it’s back to back or face to face when it goes into the cutter (this will make mirrored cuts)
  • Prepare your fabric into 10″ x 20″ rectangles, these can be individual layers or Z-folded material in as many layers as you can stack
  • Please make sure your material is flat, the knife will cut straight down through a fold/etc meaning the size will be wrong if it’s folded or bunched. Ironing is not necessary as long as it lays flat.
  • Coordinate with the e-mail address above to drop off material. We can cut it while you wait if you’ve prepared it correctly, we just need to know which pattern you want
  • Thank you to all the sew-ers doing the hard work!
Posted in Uncategorized

Thank You Amy

It’s with great sadness that I write this, but it’s important we thank those who impact our entrepreneurial community in Madison in such major ways- thank you Amy for the work that you’ve done. We’ll miss you – and we’ll do our best to carry forward as you would have wanted.


Amy and Jocelyn Gannon

I think a little history here is important, a thank you means a lot more with context and perspective so I hope you’ll bear with me.

My introduction to Amy was through Lorin Toepper, then the executive director of economic development at Madison College who we also lost so early in his career. Lorin’s goal was to draw together entrepreneurial innovators in the city and host a “Startup Weekend” and Amy was first on the list. Startup Weekend itself was just a startup then, Lorin found a concept that was way ahead of its time and worked hard to bring us together and make it happen – once this was in front of Amy it wasn’t a question of whether it would happen, just a matter of when. Her spirit and can-do regardless of the obstacles was what made working with Amy interesting and fun, and she knew it. Practically the next day, Amy had her husband Mike roped in to drum up some PR and there was no turning back.

Ultimately, Startup Weekend drew Amy, Lorin, Forrest Woolworth, Allen Dines, and I together and solidified an event that still happens every spring – many thanks to organizers who have stepped up to carry forward when those of us were unable. Without Lorin’s leadership and Amy’s enthusiasm our city wouldn’t be shaped the way it is today – Startup Weekend created a lot more startup’s than any of us realized: When I met Amy, I realized I needed to introduce her to Heather Wentler – I think their shared love for teaching instantly connected and they grew from there. Amy and Heather both saw something the Madison community didn’t – a lack of women and minority involvement in entrepreneurship. Rather than be content with this, they talked at length during the inaugural Startup Weekend and created a “Women’s Entrepreneur Group” by mid-2012 – action was Amy’s way forward on anything she felt was worth pursuing. Heather and Amy have moved The Doyenne Group miles forward over the past 7 years. I hope our community steps up to help carry forward this important work – Amy leaves behind big shoes to fill and I hope we’re ready to step into them and keep working forward.

Posted in Uncategorized

Sector67 Welcomes a New Business

The business incubator at Sector67 has a new member: John Lash started Mad DesignWorks LLC there in September of this year. Focused on designing and building custom assistive and adaptive devices for the disabled community Sector67 with its combination of office space and well appointed shop space is the perfect fit for a small startup like Mad DesignWorks.

After graduating from Madison College with a degree in Mechanical Design John wanted to do something to make the world a better place. Combining his interest in assistive and adaptive devices with his interest in design John aims to improve the quality of life for people with physical disabilities.

In addition to building custom assistive and adaptive devices Mad DesignWorks offers a variety of other services including:

  • Modification of existing equipment
  • Fabrication of hard to find or obsolete replacement parts
  • Modification of furniture
  • Consulting
  • 504 Plan compliance
  • Design and Manufacture of ergonomic devices
  • Helping employers meet the needs of all their employees

One of the first projects Mad DesignWorks did at Sector67 was to design and build a custom tilt table to help a client with only limited use of one arm to pursue her painting career. With her new tilt table Jeanne can paint more independently than ever before. Once Jeanne is finished with a painting it is turned into a clock and sold locally.

The completed tilt table.
Jeanne painting with her new tilt table.
The final product.

Helping people like Jeanne become more independent and self supporting is really why Mad DesignWorks exists. Without the support of Sector67 and Chris Meyer this would not be possible, Mad DesignWorks is proud to be a part of this community.

To contact Mad DesignWorks LLC please call or text:


or email:


Posted in Businesses at Sector67

Build Madison 2019 Summary

2019’s Build Madison kicked off on a bright and warm November day with a wide variety of projects:

  • Scott – Moved forward on the open toaster project – the goal being to create a maintainable open-source appliance that never becomes obsolete, starting with the toaster.
  • Brian – Built a cocktail table MAME (classic arcade) cabinet using the wood shop and laser cutter to create a TV stand as well as button interface.

  • Kate – Rendered a protein structure in Blender and worked to learn how to animate it.
  • Jim and Nick – Continued efforts on an enclosed bicycle transmission that keeps the geartrain out of the weather and debris.

    (and the velomobile needed a light and horn adjustment)
  • Brian – Refit an old Phoenix GSM enclosed CNC wood router with LinuxCNC.

  • Chris – Used the laser cutter to build a papercraft polar bear with paper-backed wood veneer.

  • Laima – Created a steel kinetic yard art sculpture using bicycle parts and stained glass (future work!).

  • Adam – Made ash trim for the face of a sink base cabinet using the CNC router and a v-bit.

  • Jeremy – Baked 3 loaves of Jeremy’s Special Sour Dough [JSSD ™] bread and a “fruit cake so nice that you’d want to receive it as a gift”

  • Max – Tested his glass lampworking skills by building a plant inspired glass piece with realistic leaves and branching structure from borosilicate glass rod.

  • John – assisted a few people with design and engineering advice

  • Jack and Davi – Modified a Korg Monotron Synthesizer to run from an Arduino to enable digital and preprogrammed effects.

  • Chris – Wrote a summary blog ūüôā and finished construction on the exterior exhaust and ductwork (thanks Nate!) for the welding shop air filtration system.

Participants enjoyed a late breakfast of pie and snacks, brats and hamburgers for lunch, pizza for dinner, and handmade pancakes for breakfast. Hope you can join us next year for 2020!

Posted in Uncategorized

Build Madison 2019

Build Madison

Build Madison is back!

The 24-hour community “create-a-thon” returns to Sector67 on November 16 at 10am. Project presentations (open to anyone) begin at 10am on Sunday, November 17.

We’re excited to announce the 8th annual Build Madison at¬†Sector67.¬† Build Madison is a 24 hour hackathon that gives you the opportunity to set aside some time over the weekend to finally get to that project you’ve been thinking about for a long time!
The weekend starts out on¬†Saturday, November 16th, at¬†10am, when we’ll host short idea pitches to form teams/work alone – then when 10AM on Sunday¬†swings around we’ll have short presentations on results and/or sharing of lessons learned (aka: why my project didn’t quite get done in time!).
That’s as simple as it is – take the 24 hour period as seriously or as inquisitively as you’d like. In the past, projects have varied from very sophisticated to very basic, software to hardware, art to engineering – so don’t feel like your concept isn’t going to fit in – it will.
For more information, please register at the Build Madison website: http://buildmadison.org/
Who: Anyone interested
What: 24 hr hackathon
Where: Sector67 Р56 Corry St, Madison, WI Рshort ride on your bicycle and not far off the bus route
When: November 16th at 10AM through the 17th, with project presentations (open to anyone) starting at 10AM on the 17th
Why: A great excuse to focus on a project for a weekend and meet with other interesting folks too
This is a FREE event. Check out the prior project summaries at: http://buildmadison.org
We hope to see you on the 16th!
Posted in Uncategorized

2019 – Latvian Summer Camp 3×3

In 2019, Sector let a printing press take an adventure across state lines to support more art and learning at the Latvian Camp in Michigan. Scroll down for pictures of the classroom, projects in progress and the final results of this venture.

The workshop before any students arrived.
Sector’s printing press on the left here.
Students ranged in age from 12 and up.
Many discussions about roller pressure, paper type, color layering happened while gathered around the press.
Final projects covered a wide range of styles and colors.
This young lady made some excellent timelapse videos of the carving process that helped visitors see how the carving process actually works in real life.

Posted in Uncategorized Tagged with: , , , ,

July 2019 Workshop – Code with Python and edit bacteria using CRISPR-Cas

A bioengineering workshop was conducted at Sector67 on July 15 & 18 – 2019, that bridged concepts in genome editing and computer programming. In this hands-on workshop, students edited a bacterial genome using the new and exciting CRISPR-Cas9 system and performed string manipulations using Python to visualize and code the cellular editing process.

In the wet-lab part of this workshop, students prepared Petri plates to grow bacteria.  The cultured bacteria were then incubated with multiple components constituting the CRISPS-Cas9  system (http://www.the-odin.com/diy-bacterial-crispr-refill-classroom-kit/)  to edit the genome.   The cells were then grown on Petri plates containing a growth medium that selects for the edited cells. 

In the computer lab the students learnt basic string manipulation code in Python to identify a target sequence in a genome by scanning, a process perhaps similar to the mechanism of CRISPR-Cas9. 

The class was capped at eight students and this allowed students to perform both the wet-lab experiments and spend time on the desktop computers to learn and code in Python.  The workshop was spread over two 4-hour days, July 15 and July 18. The genome editing experiment was conducted on the first day and the Petri plates were incubated for cell growth.

   The students came back the second day to look at the results and learn to code.

All eight students had  success in their editing experiments !

Stay tuned to more classes and workshops along these lines. 

Posted in Uncategorized Tagged with: , ,

American-Made Solar Prize Networking Meetup 17th 7PM

We’re excited to host a connector event for the American-Made Solar Prize on June 17th at 7PM. Stop in for a discussion on solar power (speaker TBA), meet with potential team mates, hear about existing challenges and future advances in the field.

$3,000,000 in prize money is available through the contest, which is open to any competitor – the submission deadline is coming up on July 16th, 2PM E.T. First round winners (20-40 submissions chosen) receive up to $50,000 in prize money to work forward on their idea for further submissions with subsequent rounds featuring $200,000 and $500,000 in prize money allocated to winners.

YOU can participate to win a $1,000 award just for identifying industry areas that can use attention from entrants by July 5th.

The submission form is available on the contest entry website in the resources tab, linked directly here for convenience. Effectively you need to prepare a 2500 word maximum statement, a 90 second video (with no production value efforts), and some team information to create an entry for a shot at $50,000 in prize money.

Hope to see you June 17th for more information on the competition!

Posted in Uncategorized

Still Working Hard!

We’ll keep you posted but currently:

No Sector67 classes

09/08/2019 – Drop-in tours resume on the hour at 4, 5, 6PM Fridays

until we have time to set up our shop.¬† Thank you for your continued patience, if you’d like to help with construction/building out the shops please¬†feel free to sign up on the construction mailing list .¬† If you’re interested in general news/activities/etc you can sign up on the general mailing list (both are Google groups, just request to join the group, it’ll say “closed to members” because you haven’t asked to join yet).¬† If you’d like to sign up for a membership please contact us at the top right of this page.

Thank you!  Chris

Posted in Meetings, News


Upcoming Events

  • No upcoming events