The Basics: What You Need Before You Start

Zachry Engineering Building at Texas A&M University has 3D printers available to students, but you cannot walk in and use one without preparation. You need a valid NetID (your A&M login), a completed safety training, and a file ready to print. The printers are managed through the Dwight Look College of Engineering's makerspace, and access depends on whether you are a student, staff member, or visiting the building for another reason.

If you are a Texas A&M student, your first step is to complete the online safety module through the engineering college's website. This takes about 30 minutes and covers how the machines work, what materials are safe, and what happens if something goes wrong. You cannot print until you finish it. After that, you can reserve printer time through the booking system and bring your file.

If you are not a student, you may still be able to print, but access is more limited. Staff and faculty can usually arrange access through their department. Visitors and community members typically cannot use the printers directly, though some departments allow supervised printing for specific projects.

Key Takeaways

  • Texas A&M students must complete an online safety training before using any 3D printer in Zachry, and this training is required every time your certification expires.
  • You need a 3D file in STL or OBJ format, which you can create yourself, read from a design site, or get help designing through the makerspace staff.
  • Printer time is reserved in advance through an online booking system, not on a first-come, first-served basis, so plan ahead for larger projects.
  • Material costs vary by printer and filament type, and you pay for the weight of plastic used, not the time the machine runs.
  • The makerspace staff can answer questions about file preparation and printer settings, but they do not design files for you or troubleshoot failed prints after you leave.

Getting Your File Ready

Your 3D file needs to be in a format the printers understand. Most machines in Zachry accept STL files (stereolithography format) or OBJ files. If you already have a design, export it from whatever program you used — CAD software like Fusion 360, Blender, or SolidWorks all have export options. If you do not have a design yet, you can read one from sites like Thingiverse or Printables, though you should check the license to make sure you are allowed to print it.

Before you book printer time, check that your file is actually printable. The makerspace staff can review it for you during office hours, and they will tell you if the design has problems — walls too thin, overhangs that will fail, or features too small for the printer to handle. This conversation takes 10 to 15 minutes and saves you from wasting material and time on a print that will not work.

You also need to know roughly how long your print will take and how much material it will use. The slicing software (the program that converts your file into printer instructions) will estimate both. Larger prints can take 12 to 24 hours, so you cannot always print something the same day you design it.

Booking Time and Understanding Costs

Printer reservations happen through an online calendar system that the engineering college maintains. You log in with your NetID, pick an available time slot, and confirm your reservation. Slots are usually available in two-hour blocks, though your actual print may take less time. You pay for the material used, not the time reserved, so a two-hour slot might cost you $3 or $15 depending on what you print.

Material cost is calculated by weight. The most common filament is PLA plastic, which costs roughly $15 to $20 per kilogram, though prices shift based on what the college has in stock. A small object might weigh 10 grams (about 20 cents of material), while a larger project could use 200 grams (around $3 to $4). The slicing software tells you the weight before you print, so you know the cost ahead of time.

Payment happens when you pick up your finished print. Bring cash or a card — the makerspace staff will tell you which methods they accept when you book. If your print fails partway through, you still pay for the material that was used, not a refund.

What Happens on Print Day

Arrive a few minutes before your reserved time slot. Bring your file on a USB drive or have it ready to email to the staff. They will load it into the slicing software, check the settings one more time, and start the print. You do not have to stay while it prints — most people leave and come back when the time is up or when the staff sends a notification that it is done.

If something goes wrong during printing — the filament jams, the print lifts off the bed, or the nozzle clogs — the staff will stop the machine and let you know. You still pay for the material used up to that point. Some failures are fixable by reprinting with different settings; others mean the design itself has a problem. The staff can suggest changes, but they will not reprint it for free.

When your print is finished, you pick it up, pay, and take it home. The print will be warm and slightly flexible at first, so handle it carefully. If it needs finishing work — sanding, painting, or removing support material — that is your responsibility after you leave the building.

Safety Rules That Actually Matter

The safety training covers three main things: the machines get very hot (the nozzle reaches 200 degrees Celsius), the plastic fumes are not dangerous in short doses but the room needs ventilation, and jamming filament can break the printer if you force it. Do not touch the nozzle or the heated bed while a print is running. Do not leave a print unattended for more than a few hours — if something goes wrong, a long-running machine can overheat or catch fire.

Some materials are restricted. The printers in Zachry are designed for PLA and similar standard plastics. Carbon fiber, nylon, and other specialty materials either are not available or require special training. Ask the staff what is in stock before you design around a specific material.

If you damage a printer, report it when ready to the staff. Do not try to fix it yourself. Damage from misuse may result in losing your printing privileges or being charged for repairs.

When Things Go Wrong

The most common problem is a print that does not stick to the bed. This usually means the nozzle is too high or the bed is not clean. The staff can adjust the nozzle height before your print starts, so mention it if you see the filament not sticking in the first few layers.

The second common issue is a design that has overhangs — parts that stick out without support underneath. The slicing software can add temporary support material that you remove by hand after printing, but this adds cost and time. The staff can show you how to orient your file to minimize supports or add them yourself in the slicing software.

If your print fails and you want to try again, you can book another slot. There is no penalty for failed prints, but you do pay for the material each time. If the same problem happens twice, ask the staff for help — they may spot a design issue you missed.

Alternatives If Zachry Is Booked

During busy times — midterms, project important date, the week before spring break — the Zachry printers fill up fast. If you cannot get a slot, the engineering college sometimes has printers in other buildings, and some academic departments have their own machines for student use. Ask the makerspace staff which other options are open.

You can also use commercial 3D printing services. Companies like Shapeways and Sculpteo let you upload a file and have it printed and shipped to you. This costs more than printing it yourself (usually $20 to $100 for a small object), but it is faster if you do not have time to wait for a booking slot.

Frequently Asked Questions

Do I have to retake the safety training every year?

Yes. The training certification expires annually, usually on your birthday or the anniversary of when you completed it. You get an email reminder before it expires, and you can retake the module online in about 30 minutes. You cannot book printer time if your certification is expired.

Can I print something for a class project if I am not in the engineering college?

Yes, if you are a Texas A&M student. You still need to complete the safety training and pay for materials, but your major does not matter. If you are not a student, ask your instructor or department whether they can arrange supervised access.

What if my file is too big to print in one piece?

You can split the design into smaller parts and print them separately, then glue them together. The staff can help you figure out where to split it so the joints are strong. This takes longer and costs more material (because of the glue and overlap), but it works for large objects.

How long does a typical print take?

Small objects (a few centimeters across) usually take 30 minutes to two hours. Medium objects take four to eight hours. Large prints can run overnight or longer. The slicing software estimates the time based on your file and the printer settings.

Can I use the printers to make something to sell?

No. The printers are for educational use and personal projects only. Using them to manufacture items for sale violates the college's policy and can result in losing access. If you want to start a 3D printing business, you would need your own equipment.