Wynn Grame

About me

Mechanical engineering graduate with experience in prototyping, product design, and team leadership. With skills in CAD (SolidWorks, Creo, Fusion 360), mechanical design, and problem-solving. Seeking a full time role to apply technical skills and contribute to engineering solutions.

Engineering Portfolio

Knock Lock

The Knock Lock is a mechatronic locking system designed to provide secure, unobtrusive personal storage while improving accessibility for users with dexterity limitations. The device replaces conventional keys and numerical keypads with a programmable knock sequence. It is detected by a piezoelectric sensor tuned to record adjustable knock sensitivity. The system integrates an Arduino Uno, solenoid actuator, limit switch, and multi-state LED indicators within a concealed electronics compartment. Ensuring that no locking hardware is visible during normal use. Custom housing and mounting brackets were developed to position the locking and sensing component. All primary design objectives for hidden hardware, low fine-motor demands, and intuitive user interaction have been achieved.

On this project I worked in a group to develop for UWM's Introduction to Mechatronics class. The Knock pattern detection a good challenge as it needed to only unlock with the right sequence and timing of knocks while still allowing the human variation of knock patterns. The system I came up with allows for easily changing patterns up to 20 knocks, it allows for an adjustable amount of allowable variance in the pattern. It works by measuring the time between knocks which are detected with the piezoelectric sensor in seconds, and with each new knock it compares the previous inputs to see if it matches the knock pattern within a set variance.

Created working together with Justin Pflanzer, Elijah Albrecht, Joshua Lee, Colton Dreher

Finger Strength Measurement For Climbers

The standard way to measure finger strength for rock climbing is to hang off a small edge with both hands and incrementally add weight to the body, until the climber finds their limit. This method has its downsides as strong climbers can require adding a lot of bulky and costly weights that are uncomfortable to wear.

I designed a device to directly measure the amount of force the climber pulls on a small edge training device. It utilizes an in-line load cell connected to a micro-controller and screen that displays peak force and can graph force over time. Instead of hanging off the edge with both hands the climber uses this tool with one hand at a time, this allows for the climber to pull with maximal effort without leaving the ground and without the need to add extra weight.

A challenge I faced during this project was getting a high enough sampling rate with the setup to capture force peaks, as a slower sampling rate could miss a force peak resulting in a lower max force measurement.

Tall Bike

Undergrad’s first welding experience gives him a higher viewUWM engineering student Wynn Grame got an idea in his head: to build himself a very, very tall double-decker bike. Then he went ahead and did it.

Stemming from my love of biking and my experience leading UWM's Bike Shop at Outdoor pursuits I built a passion project. A bike tall enough to get a nice view of the city doubling as a clown implement.
This bike is made from the pieces of two bikes plus 30 feet of steel tubing. This was my first time welding so I used the project as a skill builder. More so a fun project than practical engineering however I did get to use some calculations and FEA to verify deflection and buckling of the frame design.

You can find my on my tall bike commuting around Milwaukee and at the beloved Riverwest 24 bike race.

Read more with the article and video made by Laura Otto & Lucca Marcello

Cable Tie Tool Modeling and Mechanism Improvement
Senior Design Project Sponsored by HellermanTyton

For some of the cable tie tools which HellermannTyton makes they require high user force on the handle to tension cut off larger cable ties at higher tensions. We were tasked at reducing the user input required to use the tool while maintaining the same output force. Without changing the exterior of the tool were were to optimize the 7 linkage mechanism within the EVO9i HT.

To achieve this we created a mathematical model which was able to relate user input to output force given a linkage configuration. Using a python script to optimize the lengths linkages which we found significant, we were able to achieve a reduction of input force by 47.5%.

We also suggested modifying the blade geometry to introduce an angle such that the force needed to cut is reduced and a progressive shear is introduced.

Group Members: Avery R, Ben K, Matt P, Nick S, Wynn G

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