We’ve written on this blog about the completion, delivery, and feedback for PathPoint’s wheelchair computer desk, but what about the other project intended for Mrs. Jones? We’re glad to report that this project has now been constructed, assembled, and painted according to the student plans and delivered to a grateful 4th grade teacher!
Like all of our COVID-friendly projects this year, the design work was done by students: Alan, Davis, Eliana, Isaiah, Kaitlyn, Kassy, Sam, Zach, and Pedro. Their original concepts were submitted as sketches and miniature models back in October 2020.
Alan’s early LEGO concept (October 2020)
Mrs. Jones reviewed these concepts and filtered out the ones that were less suitable. The result of this, plus another online design charrette, was a series of simple sketches and a collaborative CAD model in Onshape, which can be accessed here.
The result of a design charrette in December 2020
The final collaborative CAD model emerges
Mr. Meadth acted as fabricator for this project, with Zach in 11th grade contributing a beautiful hand-finished red oak table surface. Angel, while not an actual member of this project, worked after school to attach caster wheels and paint according to Mrs. Jones’ requested color scheme.
The linear actuator motor, intended as a replacement for an
armchair recliner and capable of over 150 lb of force
The actuator is sandwiched between
two pieces of plywood
Zach’s table surface attached and
In retracted position
From the very beginning, these mechanical furniture designs needed to closely follow the advice given over two thousand years ago by the Roman architect, Vitruvius. Vitruvius was primarily concerned with buildings for home and public use, but his timeless principles seem to fit this project particularly well: firmitas, utilitas, venustas. Translated as “strength, utility, beauty”, this triad neatly underscores the challenges and requirements of Mrs. Jones’ desk.
Strength: Can a desk be put on wheels and still be stable and secure? How can you design a desk that changes its size and shape without risking damage to users and their property (like a laptop that slips off and smashes!)? When will a cantilever design be so audacious as to become a tipping hazard?
Utility: What features are necessary and useful for any teacher? How to incorporate a maximum amount of storage while allowing room for the electrical mechanism? What are the exact heights that Mrs. Jones requires for her sitting and standing? How much desk space is enough?
Beauty: How do you hide away the necessary mechanical equipment? What should be the focal point of this design to catch the eye? What color and trim will best fit a classroom and suit the client?
Carving out a shallow hole for the wooden handle
The wooden handle structure ready for installation
(note the dowels and holes)
A strap clamp to secure the handle while gluing
Angel attaches the caster wheels
The rubber stoppers are screwed into place after painting
With the door and shelving installed, this is ready for delivery!
In March 2021, after six months of work, it was finally time to deliver the finished product. With the help of Mr. Knoles, the Lower School Principal, Mr. Meadth surprised the entire class one morning with the desk delivery. Mrs. Jones was delighted to receive the desk, and promptly filled it with her hefty teacher editionsâ€”which definitely helped as a counterbalance to the cantilever design!
The crew proudly presents their product!
Mr. Meadth surprises Mrs. Jones with the
“So I just press here…?”
Loaded up and ready to go in 4th grade
This project shows us once again that engineers, mathematicians, scientists, and technologists are uniquely poised to love those around them. As we often discuss in the Providence Engineering Academy, it is only those with a particular type of training and set of skills who can turn good intentions into deliverable outcomes. To quote Christian philosopher Etienne Gilson, “piety is no substitute for technique.”
Thank you, Mrs. Jones for allowing us to partner with you in such an interesting project this year. It was an admirable test of the students’ skills as they sketched concepts, designed CAD models, collaborated interactively, calculated forces and moments, and put saw to wood. Well done to each student who contributedâ€”you are accomplishing great things.
Back in February, we posted a blog describing the completion and delivery of our wheelchair computer desk to PathPoint. After a few weeks, we were finally able to get Mr. Meadth and Mr. Gil Addison together with his team to go over the design and get that long-awaited feedback.
Feedback from the end user is critical to the entire design process. For this particular project, the Academy had all sorts of unanswered questions: will the design function as requested? Does the screen angle suit a typical wheelchair user? How convenient is the keyboard position? Is the mechanical motion safe enough for general usage? Would a typical PathPoint resident be able to operate the remote control? What improvements could be made? While we don’t currently plan on producing a Mk II, one project often leads into another and we improve our products by understanding their strengths and weaknesses.
Gil Addison (far right) together with his grateful staff
Mr. Meadth (center) joins in for the camera
Gil met Mr. Meadth together with six of the PathPoint staff members and together they went over the particulars of the design. You can watch the entire footage here, and a summary of design points is also included below.
As we draw this project to a close, thank you to PathPoint for being willing to work with us in an ongoing fashion! May our students always be inspired to use their God-given gifts with training and understanding, and we hope that the PathPoint residents are blessed through this simple gift.
Screen Angle: Although the older iMac that was tested tended to slip on its hinge, once kept in place, the screen was easily able to tilt downwards to any wheelchair user at a suitable viewing angle.
Gil tests out the seated angle
Standing Height: The PathPoint ambulatory staff members found the maximum standing height to be comfortable and sturdy.
PathPoint staff test the standing height
Motor Function: Although the motor sounds like it is straining to raise the desk, and there is a slight but noticeable bending of the wooden attachment, the motor appears to be able to operate the desk satisfactorily.
Desk Size: The PathPoint team felt that the final desk size was a little smaller than they would have liked; although the keyboard and mouse did fit on it, there was not much room to move the mouse. Possible solutions: use a trackpad instead, attach a larger plywood sheet to that desk, or rebuild that component.
Operability: It is very easy for an ambulatory user to operate, although the small remote with small buttons may be difficult for some users. The desk adjustment at the front might be hard to operate, but it probably doesn’t need to be used often after being set in one position. Possible solutions: rebuild the remote with larger buttons that still trigger the same microswitches, build an app that uses the same remote frequency.
Other Improvements: The iMac base barely fit under the clamp; the wooden piece at the back that gets in the way could be chamfered down. The same wooden piece that flexes slightly could be doubled up. A spherical router bit could carve out a channel in the desk for the keyboard to fit into. The carriage bolts for the rear clamp could be longer to permit a thicker desk.
Following on from our last post, we’d like to provide an update: the custom computer desk for Gil Addison at PathPoint was recently delivered, bringing that particular project to a close. This desk raises up and down to any given height using an electrically driven linear actuator. The wheelchair user carries the remote control key fob, allowing complete adjustment from near or far. The desk is intentionally designed to tip the computer forwards to face down towards the user, as many wheelchairs seat the occupant in a reclined position.
At the time of this writing, we are still waiting for feedback on the end result and photos of the desk in action. But in the meanwhile, enjoy some photos of the students as they put together the final product and examined the results. Thank you, Gil, for helping us execute such a meaningful project!
The final product assembled in the workshop, after some final modifications. The actuator placement had to be changed in order to create more torque to lift the table.
After disassembly, Nolan (senior) set to work applying the protective oil to the upper table surface
Abby (freshman) oils the lower base piece
After all pieces were oiled, Angel (sophomore) reassembled the entire structure together with Mr. Meadth
A few more bolts to go–almost there!
The finished product as attached to a typical household table, keyboard shown
The finished product in the full lowered position
Teleios, Hunter, and Abby (freshmen) get their first look at the end result on the day of delivery
Joshua and Nolan (seniors) test out the remote control
The whole team from left to right: Hans, Abby, Hunter, Teleios, Mr. Meadth, Angel, Joshua, and Nolan (James was also in this group); note an iMac computer attached as per intended use
Even in the midst of a global pandemic, the Providence Engineering Academy follows a particular philosophy that transcends circumstances. While many robotics clubs and engineering programs might teach physics, maker skills, CAD, and more, we believe that these elements—”fascinating as they may be—are only the means to an end. In the latest application form for the coming year, there are six “big ideas” listed; Big Idea Number 1 is that service matters:
As Christians, we have an obligation to turn our skills outward to the world around us; we learn not for our own sakes.
While we may not be allowed to mix cohorts or share equipment, the seventeen dedicated upper school students are committed to loving their community using their math, physics, coding, CAD, robotics, and maker skills.
Early on in the school year, we found two willing partners in this process: one was Mr. Gil Addison of PathPoint, an organization serving at-home and on-site residents, many of whom use a wheelchair each day due to their limited mobility. The other was Mrs. Christa Jones, 4th Grade teacher in the Providence Lower School. Both of these clients had distinct requests for custom-made furniture and it was the perfect opportunity for our students to put their new-found statics knowledge to the test (statics is the study of physically balanced situations where the net force is zero, such as buildings and bridges).
Mrs. Christa Jones, 4th Grade Providence Teacher
Mr. Gil Addison, PathPoint
Mr. Addison wanted a custom-made desk for an iMac computer that could be set to a lower height for a wheelchair occupant, and then back up to a standing desk height for an ambulatory user. Such a desk is hard to find in the current marketplace, and the engineering students saw an opportunity to provide something uniquely useful. The desk would be mechanically driven by a remote control, safe for an individual with limited dexterity, and functional to hold the computer at any height without concern.
By contrast, Mrs. Jones needed a new teaching desk at the front of her room to help meet the new style of a COVID year. This mobile desk would need to be equally useful in a standing or sitting position, for maximum versatility with her in-person and at-home students.
How to meet the needs of these clients in a year when the Engineering Academy is functioning in an independent-learning mode? How could we hold a meaningful design charrette when mixing between cohorts is prohibited? How can seventeen students come up with an agreed-upon detailed design and communicate it with the clients?
Answer: with creativity, technological tools, and a great attitude!
The students began by watching pre-recorded videos from the clients as they described their requests and necessary constraints to Mr. Meadth, the Academy Director. Mr. Meadth offered up some quick sketches and ideas in the videos to help sort through what would and wouldn’t work.
Early notes for Christa Jones’ project
Early notes for Gil Addison’s project
The students then used LEGO and other construction materials to make quick miniature mock-ups of their ideas, along with sketches to help show functionality. The images were sent to the clients to help them think through the possible solutions at hand. Another round of recorded video reviews with the clients, and then the real design work began!
Alan’s rolling cart concept
Kaitlyn’s desk concept with extendable platforms
Together with Mr. Meadth, the students worked together over Zoom and in their grade level cohorts, using the cloud-based CAD tools from Onshape. With each student taking ownership of several parts from the whole, they worked collaboratively to produce something that could be presented back to client as a visualization and to the fabricator as dimensioned drawings. Teleios in 9th Grade can create the top part of the desk, Angel in 10th Grade can make the support struts, and Nolan in 12th Grade can design the platform for the keyboard. All team members can see how the pieces fit together in advance, spotting potential problems before a single cut is made. This kind of ease, speed, and confidence in the design process simply did not exist even five years ago, and we are glad for it!
(The computer desk for Mr. Addison can be viewed live here, and the rolling cabinet for Mrs. Jones here. Both models are interactive.)
Mrs. Jones’ rolling cart CAD model
Mr. Addison’s adjustable computer desk CAD model
So where are we today? After purchasing the plywood, oak, mechanical actuators, caster wheels, and other bits and pieces, fabrication is underway. The clients are now eagerly awaiting the delivery of their prototypes. Gil Addison’s computer desk is nearly complete at the time of this article, and Zach in 11th Grade has put together a beautiful biscuit-joined red oak desk surface for Mrs. Jones’ rolling cabinet.
James assembles the clamping mechanism for Gil’s design
Teleios and Abby show off the parallel linkages
Nolan with the mechanical actuator
The vision nears reality for PathPoint!
Zach’s red oak table surface (3 ft long)
We’ll update this blog site as the projects are completed and delivered. For now, we’re just glad to be able to continue our exciting mission through a pandemic and out the other side. The exhortation in I Peter Chapter 4 seems particularly apt:
Each of you should use whatever gift you have received to serve others, as faithful stewards of Godâ€™s grace in its various forms. If anyone speaks, they should do so as one who speaks the very words of God. If anyone serves, they should do so with the strength God provides, so that in all things God may be praised through Jesus Christ.
Keep on serving with the strength God provides, engineering students! You’re making us all very proud.
There hasn’t been a lot of action on this blog site so far this school yearâ€”but not because there aren’t things worth writing home about! As you can imagine, I (Mr. Meadth) have been much busier on the ground each day with cleaning and supervision, let alone teaching the engineering class.
But some things are worth documenting and celebrating. So let’s jump in!
1. Four New Freshmen
We took four new engineering students into the freshman class. A big welcome to Hunter, Abby, Teleios, and Eliana. These junior engineers are hitting the ground running, despite all the challenges. They are learning trigonometry before their time, taking baby steps into the world of computer-aided design (CAD), and just generally being awesome. Welcome, freshmen!
Hunter, Teleios, and Abby (Eliana couldn’t make this photo, but she’s just as much a part of this group!)
2. College-Level Statics… From a Textbook
Despite my propensity to always design my own curriculum from the ground up, I tried something new this year: a textbook! It turns out this was the perfect year in which to do this, as it matched well to the statics studies that we’ve always done anyway. Don’t be led astray by the nameâ€”Statics for Dummiesâ€”the lighthearted tone helps high schoolers get through those pesky equations. For those engineering parents out there, you’ll find all of the fun you can handle in vector calculations, force couples, and free-body diagrams.
3. Independent Mode
This is a grand experiment, and one that we committed to from the start of the year. Can we commit to a full year of engineering studies in independent mode? Some would say that it’s never been tried, but this is the year to come up with new solutions! Despite the absence of stimulating classroom discussions, this has allowed students to take seven classes plus engineering, and it allows students to watch at their own pace. Students have watched 18 videos so far this year, and responded with written assignments and discussion boards. They are now eagerly discussing their community design project in a shared Google Doc, which brings us to Number 4…
Acceleration sums in three dimension, anyone?
If you can’t find the centroid of a composite area, you just can’t call yourself an engineer
4. Community Design Project
I’m so happy with how this project is rolling forward! We have two “clients”, Mrs. Christa Jones on the San Roque campus and Mr. Gil Addison at PathPoint, who works with residents in wheelchairs. Our student teams are busily designing an adjustable standing desk for Mrs. Jones and an adjustable computer desk for Mr. Addison. Both of these designs are required to involve electrical/mechanical aspects, such as motorized lifts or built-in LED lighting. Once the student teams finalize their designs, complete with drawings and CAD models, I (Mr. Meadth) will be building their designs myselfâ€”in the interest of staying as contact-less as possible.
5. Lots of Publicity
We’ve received a surprising amount of national-level publicity lately. Our students use the CAD platform Onshape, and Onshape reached out to us to record a video and write a blog article. The video has been up for a over a month now, and the blog article will be published soon. Our Academy was also mentioned in another national publication by the American Institute of Aviation and Aeronautics (AIAA), Aerospace America, because we won a $500 grant to help build our remote-controlled aircraft.
6. Major Grant Win
Is it just me that believes in our outstanding Providence engineering program? Is it just the university lecturers who receive our already-highly-trained students? Am I just blowing my own horn over here? Apparently not! The Toshiba America Foundation decided that our second-semester robotics project was something worth funding, and we are pleased to announce that over $4,000 of the very latest in classroom robotics equipment will soon be arriving on campus. This will be put to use in our Mars Rover project, where different student teams will design, build, and code different components of one big vehicle. I’m looking forward to this one. Thanks, Toshiba!
One of the advanced Vex V5 sets: coming soon!
As always, stay posted for more exciting announcements. Our junior engineers are doing something very different, but making the most of it. I’m confident that their skills and experience will remain at the very highest level amongst similar programs in our area. Keep it up, students!