I'd thought I'd just share that we use Springshare's LibWizard to make patrons aware of our policies on 3D printing, get the information we need from them, and to submit their STL. We print in submission order, so this effectively becomes our print queue as well. Here's what we say and ask for:
Please review our Acceptable 3D Printing Guidelines before submitting a print job.
(a) prohibited by municipal, provincial, federal, or international law;
(b) unsafe, harmful, dangerous, or capable of posing an immediate threat to the well-being of others;
(c) obscene or otherwise inappropriate for the Library environment;
(d) which may violate another's intellectual property rights (for example, the printers and scanners cannot be used to reproduce materials that are subject to copyright, patent, or trademark protection).
The library reserves the right to refuse any 3D print request.
The printer queue is a first-come, first-served system.
Printers are operated by library staff only.
Printing costs are $0.10 per gram of material used. The cost of the print will be charged to your library account. Unsuccessful prints will still incur filament charges. Refunds are not available.
The Library is not responsible for the functionality or quality of content produced on the 3D printer.
First Name: (required)
Last Name: (required)
Library Card Number (required)
Please indicate any specific resolution, speed, material colour, or support requirements.
By default staff will print using the settings they believe will create the quickest, most reliable print.
Our policy is similar with one significant exception. If a patron submits a print request for an object that they designed, they are moved to the front of the line. One key goal of the 3D print lab is to encourage patrons to create . When they have rolled up their sleeves and made the effort to create an object we reward them with the front of the line.
Additionally, print jobs are limited to 4 hours per library card per month. Library cards can be "stacked" for jobs exceeding 4 hours. Meaning a family of 4 can combine their cards for a 16 hour print job.
Finally, we insist that files found online must have at least 12 prints before we will attempt a print. We learned early on that anyone can get a login and password but not everyone can make a printable file.
We may have to impose limits at some point, but I really like your first and third points and will bring that up with the staff.