Hello! My name is Alex Alessi and I am a Homewood student studying Robotics and Mechanical Engineering here at Hopkins. Whether it’s an autonomous boat, a low-vibration cryostat or a home automation device, I love to design and build electro-mechanical systems. Working on a project that could use a fresh set of eyes? Don’t hesitate to reach out! Outside of working hours, you’ll find me hiking, climbing or camping. The outdoors is my second home and I’m most content when I’m lost on an outdoor adventure.
Contact Info: firstname.lastname@example.org
Catherine Pollard is a first-year undergraduate, pursuing a degree in Mechanical Engineering and minoring in Robotics and Philosophy. Hailing from the great state of Massachusetts, she is most interested in making “making” accessible to everyone; that is to say, teaching individuals with different experience levels and areas of expertise how to realize their ideas through manufacturing. Other passions include A Capella music and medical technology.
Contact Info: email@example.com
Hello there! My name’s Dylan Zhu, I’m a freshman studying BME and MechE. I’m interested in creating medical devices, especially ones that closely interface with our brains (like prosthetics and BCIs), and finding ways to help consumers get the most out of such products. Outside of work, I like listening to music (lots of Arctic Monkeys and Miles Davis) and lifting. I can’t wait to see what you make in the makerspace!
Contact Info: firstname.lastname@example.org
I-lin Wu (Link)
Hi, my name is I-Lin Wu. You can call me Link. What?? Yes, it is the same as the character name “Link” in Zelda. My dad used Link as my English name when I was a child, and surprisingly, he didn’t even know Zelda at that time. I graduated from the University of California, Los Angeles with a bachelor’s degree in the major of electrical and computer engineering. While in college, I worked as an Assistant IC design and test engineer intern in California for about 3 months. I learned how a product is being developed in an early stage and the importance of working as a team. I also have got the chance to modify the components in the circuit and increase the power efficiency by analyzing the data collected. After that, I found a short-term job at Foxconn in China and worked as a research and development test engineer. This experience gave me the chance of working with Apple’s engineers to develop, design, and implement cost-effective methods of testing camera modules in a manufacturing environment. Now, I am pursuing my master’s degree in the major of Computer Science at Johns Hopkins University.
Contact Info: email@example.com
Marcus is a junior mechanical engineering student, coming from a 3+2 Dual Degree Program with Goucher College where he studied Physics. He is from Harrisburg, PA, where he gained a year of experience working at a local Makerspace. At Hopkins, Marcus is a member of Blue Jay Racing, Hopkins’s Baja SAE Team, the Transfer Student Association, and Club Swimming. He enjoys assisting with design and helping projects reach their full realization. His area of expertise is working with 3D printers, but he is familiar with using laser cutters, vinyl cutters, CNCs, lathes, and mills.
Personal protective equipment is essential gear when working with tools and machines. We have safety glasses, hair ties, headphones, and earplugs that must be used when working in the wood shop, metal shop, and paint booth.
Tips for Using Protective Equipment
How to Use Earplugs
Roll the earplug into a small, thin “snake” with your fingers. You can use one or both hands.
Pull the top of your ear up and back with your opposite hand to straighten out your ear canal. The rolled-up earplug should slide right in.
Hold the earplug in with your finger. Count to 20 or 30 out loud while waiting for the plug to expand and fill the ear canal. Your voice will sound muffled when the plug has made a good seal.
Check the fit when you’re all done. Most of the foam body of the earplug should be within the ear canal. Try cupping your hands lightly over your ears. If sounds are much more muffled with your hands in place, the earplug may not be sealing properly. Take the earplug out and try again.
Putting on a Face Shield
Rotate the wheel on the sides of your ear to lock the face shield in place. To adjust fit around head use the knob on the back of your head by pushing in and then rotating.
Cleaning Safety Glasses
To clean safety glasses use the ULINE Lense Cleaning Station. Wipes and spray are provided.
A nut driver is a tool for tightening nuts and bolts. It essentially consists of a socket attached to a shaft and cylindrical handle and is similar in appearance and use to a screwdriver. They generally have a hollow shaft to accommodate a shank onto which a nut is threaded.
Use it For: Lower torque applications in accommodating a nut.
A utility knife is a cutting tool that features an extendable blade.
Use it For: Cutting things.
Safety Information: Watch your fingers! Make sure your hands and body are not in the line of the cut. Don’t use a utility knife when a different tool would be better suited for the job (chisel, screwdriver, etc.).
Spare Blades: There are extra blades in the base of the utility knife that can be accessed by removing the screw on the side of the knife. Be careful when replacing the blade and be sure to dispose of the used blade in the yellow sharps container.
Pliers are used for clamping, cutting, and turning objects. They are not always the best tool for the job, especially when another tool like a wrench or hammer could be used instead.
Types of Pliers
Needle-nose pliers are best for small applications where other pliers wouldn’t fit. They can maneuver into tight spaces because of their long, thin noses.
Side-cutters have a cutting edge along one side and are often used for cutting wire. When cutting solid wire, it is best to cut part of the way through the wire and then grip the wire and bend it back and forth until it breaks off.
Slip-joint pliers are general use pliers with an adjustable mouth. There are two types: multiple hole or tongue and groove. Tongue and groove slip-joint pliers will generally have more adjustability than multiple hole slip-joint pliers.
Linesman pliers have two parts: a grooved gripping surface near the tip and a cutting edge.
Locking pliers are a useful tool that allows you to clamp something without having to hold the pliers. How to use: To adjust the size of the mouth, turn the adjustment crew at the bottom of the larger handle until it is the desired size. Then close the handles to grip your part. If the pliers don’t lock, the mouth is probably too small and should be adjusted. To release the pliers, press on the release lever. Watch out for: Scraping or cutting of gripped material due to excessive clamping force.
A file is a tool used to remove fine amounts of material from a workpiece. It is common in woodworking, metalworking, and other similar trade and hobby tasks.
How to Use: Place file on surface, press down firmly, and push in the direction away from you. Pushing in the direction towards won’t have any effect.
Profiles: Different file profiles have different uses. Round and half-round files are used on semi-circular and concave surfaces. Triangle files are for acute angles and corners. Square files can make slots and key ways. Rectangular files are the most common shape and can be used to file edges or flat surfaces.
Coarseness: A file’s coarseness is determined by the spacing of its teeth: the further the spacing, the coarser the file. Small files will be more fine than large files. A coarser file will remove more material with each pass and will leave a rougher finish. Single-cut files only have grooves running in one direction while double-cut files have grooves running across each other. A single-cut file will give a smoother finish than a double-cut file.
File Card: A file card is used to clean out the teeth of a file. After some use a file will get clogged up with material and its performance will suffer. Lean the file on a flat surface and push the brush in the direction of the cuts that make the file’s teeth to loosen debris.
Hook End Movement: The flat metal hook attached to the tape at the end with rivets is meant to grab onto the end of an item so that you can extend the tape. Without the hook, the tape would reel back, since it is spring-loaded. This hook is meant to slide back and forth. This is so you can measure either by butting the tape against an object or by hooking it on the edge of the object. The sliding motion ensures that you get an accurate measurement in either direction. Whether hooking the tape or butting it, make sure you do so firmly. Often, this little hook is uncooperative about sliding as it should.
Hook Accuracy: Unfortunately, the movement on the hook isn’t accurate on all tapes, and it can lose accuracy over time. If you really need an accurate measurement and you believe that the hook is not moving properly, you can do a simple technique called “burning an inch.” This means that you line up the end of the item you’re measuring with the 1-inch mark on the tape. When you take the measurement, just subtract that extra inch that you added. This eliminates any inaccuracy from the hook. You just have to remember to subtract that inch.
How to Use Calipers
Outside large jaws: used to measure external diameter or width of an object
Inside small jaws: used to measure internal diameter of an object
Depth probe/rod: used to measure depths of an object or a hole
Main scale (Metric): scale marked every mm
Main scale (Imperial): scale marked in inches and fractions
Vernier scale (Metric) gives interpolated measurements to 0.1 mm or better
Vernier scale (Imperial) gives interpolated measurements in fractions of an inch
Retainer: used to block movable part to allow the easy transferring of a measurement
Look For: Make sure to zero the caliper when you start.
Mallet: A mallet is similar to a hammer, but its large face distributes the pressure over a larger area and is better suited for some jobs. While it shouldn’t be used to drive nails, it should be used to position larger objects without denting them. Mallets are good for soft materials like wood. The red side is a softer rubber and the yellow side is a hard plastic.
Ball Peen Hammer: The ball peen hammer has two sides: one round and one flat. The flat side should be used for driving nails, hammering chisels, and breaking apart objects. The rounded side should be used for shaping metal/other materials and won’t leave a hammer mark.
Quick-Grip Clamps: Quick-grip clamps make clamping both large and small objects very easy. To make the mouth of the clamp wider, compress the quick release lever and slide the moveable arm down the bar to the desired position. Then pump the advance lever until the clamp is holding the object securely. Release the clamp using the quick release lever.
A tap set is a tool set used for creating internal or external threads in parts by hand.
Taps: used for creating internal threads in holes
Dies: Used for creating external threads on rods.
Tap Wrench: Used for holding taps and dies
Reminder: Make sure that the hole you drill is the proper size to be tapped (i.e. if you want to tap a ¼”-20 hole don’t drill a ¼” hole, you would need to drill with a #7 bit). You can find Tap Drill Size charts that will show what the proper hole size for tapping is.
How to Use: Insert and clamp the die or tap into the appropriate tap wrench (male or female). Clamp the part to be cut in a vise and generously apply cutting fluid.
For internal threads, insert plug tap into hole and cut threads by twisting the wrench.
For external threads, put tap die over part and start cutting threads by twisting.
For every full rotation you should reverse the tap/die to loosen up chips.
Look For: Keep the tap wrenches level so that the threads come out straight.
We have a supply closet with additional supplies that can be retrieved by a makerspace employee. We have office supplies like sharpies, paper, and tape as well as an assortment of bolts and miscellaneous hardware. We also have arts and crafts supplies like popsicle sticks and string. Please ask us and we will see what we can find for you!