Key Takeaways
- Louisville Free Public Library runs four maker spaces with tools including 3D printers and laser cutters available free, after a short orientation.
- LVL1, a member-run hackerspace in The Pointe, lists a 48 x 36 inch laser, a 96 x 48 inch ShopBot CNC router and several 3D printers. FirstBuild's makerspace on Brandeis Avenue takes walk-ins on weekday evenings and Saturdays.
- UofL's Additive Manufacturing Institute of Science and Technology (AMIST) handles industrial-grade work, including metal powder bed printing, 3D scanning, CAD, mold making and machining.
- Move to paid machine shops and molders once you need production materials, tight tolerances or more than a handful of parts.
- Match the prototype to the question you are trying to answer. Looks-like, works-like and pre-production prototypes need different tools.
A prototype answers a question. Will it fit in the hand? Does the hinge survive 10,000 cycles? Can a molder make it without sink marks? The cheapest way to prototype in Louisville depends on which question you are asking. This guide sorts the local options from free and do-it-yourself to fully outsourced, explains which processes suit which jobs, and offers a way to choose.
If you are planning the full path from idea to production, start with our guide to how to manufacture a product in Louisville. When you are ready for volume, see co-packers and contract manufacturers in Louisville.
Step 1: Decide What Kind of Prototype You Need
| Prototype | Question it answers | Typical tools |
|---|---|---|
| Sketch model | Is the size and shape right? | Foam, cardboard, hand tools, entry-level 3D printer |
| Looks-like | Does it look and feel like the final product? | Resin 3D printing, laser-cut parts, paint and finishing |
| Works-like | Does the mechanism or circuit work? | FDM printing, CNC parts, off-the-shelf electronics |
| Engineering prototype | Will it survive real use in production materials? | CNC machining, sheet metal, metal 3D printing, test molds |
| Pre-production | Can the factory make it consistently? | Production tooling, pilot runs |
Early prototypes should be fast and cheap, because you will throw most of them away. Spend money as the design stabilizes, not before.
Step 2: Start With Free and Low-Cost Shops
Louisville Free Public Library maker spaces
LFPL lists four maker spaces: the Northeast Regional Maker Pavilion, the Parkland Library Maker Den, the Portland Library Maker Pod, and the South Central Regional COLLIDER Maker Lab. The library describes tools including 3D printers, laser cutters, audio and recording equipment, and craft tools, available for free.
The Northeast Regional Maker Pavilion lists a Glowforge laser cutter, a Bambu X1 Carbon 3D printer, a Silhouette Cameo vinyl and paper cutter, sewing machines, and laptops with Adobe Creative Suite. You complete an online Maker 101 orientation, then request equipment two to three business days ahead. Requests are limited to two appointments a week, and users must be 13 or older to book on their own. Other branches have different equipment and rules, so check before you go.
The library is a good fit for sketch models, small looks-like parts, laser-cut enclosures and learning the tools. It is not set up for heavy machining or production runs.
LVL1 Hackerspace
LVL1 is a member-run hackerspace in the basement of The Pointe, at 1205 E. Washington Street. Its wiki lists a Rabbit laser with a 48 x 36 inch bed, a ShopBot CNC router with a 96 x 48 inch bed, a Graphtec vinyl cutter, and 3D printers including a Bambu X1 Carbon, a Creality CR-10, several Ender 3 machines, and an Elegoo Mars Pro resin printer. The wiki also mentions welding equipment, a woodshop and electronics tools.
To join, you attend meetings, fill out a membership form, and get signatures from three members in good standing. Dues are paid monthly by autopay. The wiki values three months of dues at $165, but confirm the current rate with the board. Tuesday nights are open meeting and build nights, and non-members are welcome.
LVL1's large laser and full-sheet CNC router make it one of the few places in town where an individual can cut furniture-scale parts or large enclosures without buying a machine.
FirstBuild makerspace
FirstBuild, the GE Appliances microfactory at 333 East Brandeis Ave., lets anyone use its makerspace during community hours, Monday to Friday 5 to 8 p.m. and Saturday 9 a.m. to 5 p.m. Walk-ins are welcome, and reserving tools in advance gets priority. The makerspace has three Thunder Lasers, six 3D printers, design computers and hand tools. The shop, which requires Craftsman certification, adds welding, metalworking, woodworking equipment and a water jet.
FirstBuild also runs classes and clubs, including a weekly 3D printer meetup, and invites outside inventors to submit ideas. Our FirstBuild story explains how community membership, certification and its idea process work. If you plan to submit an idea publicly, read the terms first so you understand what you are sharing.
Step 3: Use University Labs for Industrial-Grade Work
UofL AMIST
The University of Louisville's Additive Manufacturing Institute of Science and Technology (AMIST) describes end-to-end support in additive and traditional manufacturing, including 3D printing, rapid prototyping, small-batch production, 3D scanning, CAD design, mold making, casting, machining, and materials testing. Its core facility focuses on laser and e-beam powder bed processes for metals, plastics and ceramics, and it lists outside industry among the users it serves.
AMIST is the right call when you need a printed metal part, a production-grade polymer such as nylon from selective laser sintering, a 3D scan of an existing object, or materials testing. Users must complete lab access forms before using facilities. Contact AMIST at the Vogt Building, 334 Eastern Parkway, (502) 852-7599 or amist@louisville.edu for access and pricing.
Jefferson Community and Technical College
JCTC is a training resource rather than a service shop, but it matters if you want to learn to run the machines yourself or hire people who can. Its Computerized Manufacturing and Machining Technology program teaches machining, and its downtown Advanced Manufacturing and Information Technology building opened in August 2020.
Step 4: Choose the Right Process
| Process | Good for | Watch out for |
|---|---|---|
| FDM 3D printing | Fast, cheap fit checks, brackets, jigs | Visible layer lines, weaker between layers |
| Resin (SLA) printing | Smooth looks-like parts, small detailed features | Brittle resins, post-curing and cleanup |
| SLS (powder nylon) | Strong functional plastic parts, small batches | Usually outsourced, grainy surface |
| Metal powder bed | Complex metal parts that cannot be machined | Cost, support removal, post-processing |
| Laser cutting | Flat parts in wood, acrylic, cardboard, fabric | Material limits; check which plastics are allowed |
| CNC routing | Wood, plastic sheet and soft metal panels | Setup time, workholding |
| CNC milling and turning | Precise parts in production metals and plastics | Cost rises with tolerances and setups |
| Sheet metal and welding | Enclosures, frames, brackets | Bend rules, distortion from welding |
| Test or bridge molds | Real molded parts in production plastic | Upfront tooling cost and lead time |
A common path for a plastic product: FDM prints for size, resin prints for appearance, SLS or CNC parts for function, then a low-volume mold before committing to production steel.
Electronics and connected products
If your product has a circuit board, prototype the electronics on a separate track from the enclosure. Most teams start with off-the-shelf development boards and breadboards to prove the function, then design a custom printed circuit board once the parts list settles. Small runs of boards are commonly ordered from online PCB fabrication and assembly services. LVL1's wiki lists electronics tools among its member benefits, and the space is a good place to find people who have done board design before.
Plan the enclosure around the board, not the other way around. Leave room for connectors, buttons, antennas and heat. Products that transmit radio signals or plug into the wall usually need regulatory testing before they can be sold, so check the requirements for your product category with a testing lab early, while the design is still easy to change.
Keep iterations short
The point of prototyping is learning fast. A few habits help:
- Change one major thing per round so you know what fixed or broke the design.
- Name files by version and date, and keep a short log of what each round tested.
- Print or cut small test pieces, such as a single hinge or snap fit, before printing a whole housing.
- Put early models in front of real users, not just friends and family.
Step 5: Move to Machine Shops and Molders
At some point you will need parts that a makerspace cannot make: tight tolerances, production metals, many identical units, or certified materials. That is when you send drawings to a machine shop or molder.
Finding shops
Louisville has many job shops, but few market to startups, and online "best machine shops" lists are often low quality. More reliable sources:
- CONNEX Kentucky, the supply-chain database run by the Kentucky Association of Manufacturers and the Cabinet for Economic Development.
- The Cabinet's Facilities Search Database, which lists Kentucky facilities with product descriptions.
- KY-MEP, the state's manufacturing extension center at UofL, which works with small and mid-sized manufacturers and can request national supplier scouting.
- Referrals. Members at LVL1 and FirstBuild often know which local shops take small jobs.
For plastic parts at volume, Louisville has established injection molders such as HB Molding, which lists 35 presses from 120 to 500 tons, and Jones Plastic & Engineering in Jeffersontown, which lists prototyping with 3D printing and printed molds alongside production molding. Our prototyping and makerspaces directory and hardware and robotics directory list more local options.
Sending a good request for quote
Shops quote faster and more accurately when you send:
- A 3D model (STEP is widely accepted) and a 2D drawing with dimensions and tolerances.
- Material and finish, such as 6061 aluminum with clear anodize.
- Quantity, with pricing requested at two or three quantities.
- The tolerances that matter. Mark critical dimensions and leave the rest at standard tolerance.
- Your deadline, and whether you need inspection reports.
What Prototyping Costs
Shop rates vary too widely to quote a citywide average, so get written quotes. These are the inputs that drive cost:
- Library maker spaces. LFPL describes its maker space tools as free.
- Makerspace membership. LVL1 charges monthly dues. FirstBuild's community hours are open to walk-ins; see our FirstBuild story for membership details.
- University services. AMIST quotes by process and project. Ask whether rates differ for consortium members and outside companies.
- Machining. Driven by setups, machine time, tolerances and material. One complex part can cost more than ten simple ones.
- Molding. Tooling dominates. Formlabs, which sells 3D printers, estimates that a simple 3D-printed resin mold can cost as little as $100, simple aluminum molds for roughly 1,000 to 5,000 parts run about $2,000 to $5,000, and complex molds for higher volumes run from $5,000 to more than $100,000. Treat those as rough industry figures and get local quotes.
Step 6: Protect Your Work Before You Share It
Prototyping means showing your design to people outside your company. A few habits help:
- Use a non-disclosure agreement with shops and contractors before sending files.
- Keep dated records of design revisions.
- Search existing patents early. The University of Louisville's Patent and Trademark Resource Center at the Kornhauser library teaches people to use USPTO search tools, though staff cannot give legal advice or search for you.
- Public disclosure can affect patent rights, so check with a registered patent attorney before you show the design publicly or launch a crowdfunding campaign.
How to Choose
- Need a fast, cheap model this week? Book an LFPL maker space or go to FirstBuild during community hours.
- Need a big laser, a full-sheet CNC router, or regular access? Join LVL1.
- Need metal or production-grade polymer parts, scanning or testing? Contact UofL AMIST.
- Need precise parts in real materials or more than a few units? Send drawings to two or three machine shops.
- Need molded plastic parts? Talk to a molder about a prototype or bridge tool before ordering production steel.
Frequently Asked Questions
Where can I 3D print something for free in Louisville?
The Louisville Free Public Library lists 3D printers among the free tools at its maker spaces, which include the Northeast Regional Maker Pavilion, the Parkland Library Maker Den, the Portland Library Maker Pod and the South Central Regional COLLIDER Maker Lab. You usually need to complete an orientation and book ahead. Equipment differs by branch, so check with the library before you go.
Is LVL1 open to the public?
LVL1 is a member-run hackerspace, but its Tuesday night open meetings and build nights welcome non-members. To become a member, you attend meetings, fill out a form, get signatures from three members in good standing, and set up monthly dues. Members get access to tools including a large laser cutter, a full-sheet CNC router and several 3D printers.
Can anyone use FirstBuild's makerspace?
FirstBuild says anyone can visit to work on their own projects or collaborate with its team. Walk-ins are welcome during community hours on weekday evenings and Saturdays, and reserving tools in advance gets priority. The makerspace has lasers and 3D printers, while shop equipment such as welding, metalworking and the water jet requires Craftsman certification.
Can a small company use the University of Louisville's 3D printing labs?
UofL's Additive Manufacturing Institute of Science and Technology lists outside industry among the users it serves and offers 3D printing, rapid prototyping, small-batch production, scanning, machining and materials testing. Users must complete lab access forms first. Contact AMIST directly for access, consortium options and pricing for your project.
How much does an injection mold cost?
It depends on part size, complexity, material and volume. Formlabs, a printer maker, estimates that simple 3D printed molds can start around $100, simple aluminum molds for a few thousand parts cost roughly $2,000 to $5,000, and complex production molds can exceed $100,000. Get quotes from local molders and ask who owns the tool.
When should I move from a makerspace to a machine shop?
Move when you need tight tolerances, production materials such as aluminum or steel, many identical parts, or documentation like inspection reports. Makerspaces are best for early models and learning. Send a 3D model, a drawing with tolerances, the material and finish, and quantities to two or three shops to compare quotes.