New update:
Hey Everyone,
It’s update day for the Grasshopper project! Things continue to move forward at a steady pace as we juggle work on lots of different parts. We’ve been focused on dialing-in our laser welding process, making software adjustments and working with manufacturers. We expect to remain on schedule as we move forward.
Our custom laser-welding machine pictured below is used to make a few critical welds within the Grasshopper. Using a high-power emitter and a number of lenses to focus the beam, we can make tiny 0.5mm wide welds. Due to the extremely small-scale of everything in the Grasshopper, it’s very important to have this capability. The laser is controlled using a custom PCB that keeps everything moving smoothly. All of this custom equipment is designed in-house to meet our budget and keep things optimized.
Tuning the software has been an ongoing operation, mostly centered around creating bullet-proof reliability in every situation. Making tweaks and then trying to “break” the program is a large part of this. Things are going well and we’re nearing the final version.
The CNC machining manufacturer for the Grasshopper has been working hard to meet the demanding tolerances of the parts. We’ve just received the machined parts of the charger, as well as the powerful magnets used to connect the charger to the Grasshopper. To ensure a good connection, we used N52 which is the highest grade of neodymium magnet. We’re now only are waiting for the arrival of the usb cable and strain relief to have the charger fully complete. See some pictures below.
The laser welding lens holder and emitter exposed. This is operated in an enclosure.
Bags of charger parts.
Charger magnets lined up.
That’s it for now. Hope everyone is doing well! Check back for another update on August 1st.
The Grasshopper Team