3450 Brookside Rd.
Macungie, PA 18062

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3D Printing

Thanks to a grant funded by the Emmaus Rotary, we are excited to offer a MakerBot Replicator+ 3D printer for our patrons! The printer can be used to make three-dimensional objects using PLA filament with a design that is uploaded from a digital computer file. Patrons of all ages will be able to submit a design to be printed on the 3D printer.

Guided Instructions: How to 3D print at LML

3D Printing Policy

  • The library’s 3D printer may be used only for lawful purposes. Patrons will not be permitted to use the library’s 3D printer to create weapons or objects that are:
    • Prohibited by local, state or federal law.
    • Unsafe, harmful, dangerous, obscene or an immediate threat to the welfare of others.
    • In violation of another’s intellectual property rights, i.e. the printers will not be used to reproduce material that is subject to copyright, patent or trademark protection. Responsibility for possible copyright infringement lies solely with the patron and the library disclaims any responsibility or liability resulting there from. The patron is liable for any infringement.
  • Library staff will review every object file before it is printed, and the Library reserves the right to refuse any 3D print request.
  • The 3D printer is available to patrons with a current Lower Macungie Library (LML) or Lehigh Carbon Library Cooperative (LCLC) card, with no outstanding fines over $5.00.
  • Printing is available on a first come, first served basis and is done by library staff. In times of high demand, the library reserves the right to limit printing.
  • Only one print request per person will be accepted and printed at a time.
  • Priority will be given to library programs or activities.
  • Only designated library staff and volunteers will have hands-on access to the 3D printer.
  • Facilitation of the printing process by library staff does not constitute knowledge of any intended final use of the 3D printed product.
    The library is not responsible for the subsequent safety of any item made with the 3D printer.

Design Creation

  • The 3D printer can be used with basic knowledge of Computer Assisted Drawing (CAD). Creating a new design requires an advanced knowledge of 3D modeling software products.
  • Any 3D drafting software may be used to create a design as long as the file can be saved in .stl or .obj file format.
  • Digital designs also are available from various file-sharing sites such as Thingiverse.
  • Library patrons must design, scan, create or download their own models for use on the 3D printer; library staff are not available to assist in the design of an object.

Submitting a Design for Printing

  • The MakerBot Replicator+ printer uses PLA filament (biodegradable plastic made from cornstarch or sugarcane)
  • Designs must be submitted in .stl or .obj format
  • Objects can be printed in one color using PLA filament. Colors are subject to availability. Patrons can request a color, but the library cannot guarantee the specific color will be available.
    • Colors: Red, Translucent Red, Orange, Yellow, Green, Army Green, Blue, Ocean Blue, Purple, Neon Pink, White, Warm Gray, Cool Gray, and Black.
  • Patrons wanting to use the 3D printer shall email their design to 3dprints@lowermaclib.org. Staff will add the model to the printing queue.
    • The following information must be included in the email in order for your design to be printed:
      • Name
      • Library card number
      • A brief description of the item
      • Design file in .stl or .obj format
      • Preferred color (if any)
      • Additional comment (if any)
  • Library staff will review every object file before it is printed, and the Library reserves the right to refuse any 3D print request.
  • The print object must be able to be completed within 10 hours. The build plate size can accommodate print jobs up to 11”L x 7”W x 6”H.
  • Wait time for print completion will vary based on number/size of items in print queue and other possible unforeseen issues with the 3D printer (part replacement, etc.). The library will not guarantee that a print job will be ready on a specific day. Please allow 1–2 weeks for your file to be printed.

Cost of Printing

  • The cost of printing is 25¢ per gram. Cost is determined after the print job is completed.
  • Patrons will be notified by phone or email when their print job is complete and must pay for print jobs before they will be turned over. Print job must be picked up before submitting another print request.
  • Patrons will have 7 days to retrieve items printed from library 3D printers. Objects that are not picked up within that time period will become property of the library and the cost of the project will be added to the patron’s library card account.
  • Patrons will not be charged in cases of mechanical failure, objects failing to fully print, errors in the print process, or other factors not in a patron’s control.
  • Refunds will not be given if an object does not print correctly due to design errors. Patrons may not demand a new print in place of the original due to dissatisfaction with color, scale, quality, design, required support material, or other options pre-selected by the patron.


  • 3D printed objects may have small bumps, holes, and/or rough edges. These can be cleaned up using fine sand paper.
  • Objects are printed from the bottom up. If a design has a large overhang or suspended parts, support material and/or rafts may be used. These additions are easily removed by the patron. The library will not be responsible for removing any supports and/or rafts.

Design Resources

Free 3D design tools:

Ready-to-print 3D designs:





MON & WED: 10:00 A.M. - 5:00 P.M.
TUES & THURS: 10:00 A.M. - 6:00 P.M.
FRI & SAT: 10:00 A.M. - 3:00 P.M.