CNC vs. SendCutSend: Prototyping Tradeoffs
omg lauren just buy one already
For context: I’m developing modular drawer organizers and documenting my process of building, prototyping, and (maybe) launching a small production run. Read more here and here.
The latest dilemma is whether I should invest in a desktop (smaller) CNC for prototyping purposes. Thus far I have used a box cutting knife with cardboard and a prototyping service called SendCutSend for professional cutting.
The cardboard prototype served its purpose to help me learn about joinery and test my measuring skills, but it's limited in what it can tell me about material and design quality.
I get my first prototype back from SendCutSend shortly. I've learned a ton getting to this point, but a one week return time (mostly shipping) and shipping costs make it less than ideal for quick prototyping and iterating.
Assuming this device is only for prototyping, it doesn't make economic sense to buy a CNC. Maybe after 80 prototypes, it would've made sense to buy a low-end or hobbyist CNC (or laser cutting machine).
But there are other considerations, limitations, and tradeoffs:
Cycle time. Look, I know I said I was moving slowly on purpose, but a one week return from is too slow. I imagine I'll average around 3-5 prototype per week during peak design and iteration phases. The SendCutSend cycle time could turn a 1 month design sprint into a yearlong marathon.
Production-capable CNC. Since the product I'm envisioning is small, I don't need a big factory CNC. Instead of getting a cheaper hobby CNC (or laser or craft cutter), I could consider sourcing a CNC that's desktop size but with production-ready upgrades. This would change the economic model as the products eventually would bring in revenue and earn its keep, so to speak.
Learning Curve. I haven't operated a CNC (well not since middle school). In getting my own, I'd need to set up, properly maintain, and learn all the quirks and finicky stuff. This can amount to wasted material (cost) and a very slow ramp up time that may make the initial cycle time argument look weak.
Space constraints. Although I'd be sourcing a desktop-size CNC, it'll end up in my office, not a proper workshop. There will be dust. And noise.
There are other options. I believe there are a few maker spaces in my area. I wasn't thrilled about driving 30-45 min away, but it's probably worth investigating at this point.
For now, I’m treating this as a parallel track: researching CNCs that could grow with me, visiting at least one maker space, and waiting to see what the SendCutSend prototype teaches me. I’ll likely tweak the design and run another round through them while I get my CNC options lined up.
This sounds like a good plan!