Welcome to RAWWERKS! This site features the work of Raymond Weitekamp. I mostly make materials and music.

The Sickest Startup

We are launching polySpectra’s first product at the Cyclotron Road Demo Day next week, and I couldn’t have made a bigger mistake. On Sunday I felt a little bit ‘low energy’, but at the time it was barely noticeable. On Monday morning I was really tired, but it was Monday morning. I told my team I’d be fine after another cup of coffee. By Monday afternoon I realized it was not getting better and I needed to go home and lie down. »

RIP materialsGIRL

I started materialsGIRL because I couldn’t find an online community to discuss materials science. This seemed like a huge ‘unmet need’ to me, but ultimately I failed to build a critical mass. Here is the welcome message on materialsGIRL for context: Welcome to materialsGIRL - a community enthusiastic about making materials. We encourage anyone interested in learning about materials to join, regardless of your education, background, discipline or specialty. GIRL stands for Group Interaction Reinforces Learning - we hope to develop tools to promote scientific understanding, collaboration & discourse. »

READ/WRITE ERROR: Death by Notification

Have you ever unplugged an external hard drive without ejecting it first? Do you remember the angry message saying, “Don’t Do That!”. Why is it bad? Mostly because you don’t want to interrupt it while it is writing information to the disk. You might corrupt the data. TL;DR - this post is that angry message. The hard drive is your mind. When was the last time you had even an hour of completely uninterrupted time to work on something? »

Open-Source Utility for Stereolithography

The key to successful stereolithography (SLA)1 3D printing lies at the intersection of chemistry, hardware and software. The photopolymer recipe, the optics of the printer, and the print settings are all interdependent. If you make a big change to one, you will likely need to tweak the other two. Despite the fact that SLA printing is now fully democratized (there is a Kickstarter running right now for (yet another) $150 SLA printer), there is not much useful information online about how to ‘dial-in’ a reliable SLA printing process. »


I recently wrote about why I think it is important to share your failures. The idea behind my Rejected… series of posts is to do exactly that. It is not my intention to spite those that have rejected me. Instead, I want to celebrate rejection and thank the gatekeepers for keeping me out. There might be a healthy release in ranting a bit, but catharsis is not my primary objective. My goal is to choose stories that have the potential to meet at least one of the following criteria: »