Vectorized the skyline and laser-cut all day. Cancelled my Adobe subscription, wasn't using it enough to justify the price, and switched to Inkscape. Claude Opus helped a lot with the transition and with automating the boolean operations and generating the cutouts. @SHOW_ROBOTICS
Making some progress with the backdrop: one photo shows the gradients, the other is a montage with the building cutouts. Should I continue this way or order a print? Not as stoked about it as I am with the arena, tbh
Update from @SHOW_ROBOTICS workshop
Arena's taking shape. Happy with the ultra black fabric. Mixed 2x2 and 2x4 aluminium profiles, now 3D printing end caps for the parts that stick out.
Tomorrow I cut the acrylic guards. Still deciding on fixation: profile slots or T-nuts. I'll test both.
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Update from @SHOW_ROBOTICS workshop
Arena's coming along. Tomorrow I wrap the board in black fabric and frame the sides with aluminium profiles. The clear acrylic guards get cut on the CO2 laser, still crated since the move, haven't fired it up yet.
Stacking a tower of six cubes with VR teleop on the digital twin (cartoon sfx included lol)
Feels way more natural on the real arm than in sim. But sim is great for debugging. @SHOW_ROBOTICS
CORTEX vs COGNITO
Robot stacking duel in MuJoCo. Two RoArm-M3 digital twins, kinematics calibrated against real firmware (~1e-16 rad residual). Gripper's a reverse-engineered parallelogram four-bar we measured bolt by bolt.
The cubes fall for real. Gravity, friction, placement noise. COGNITO's tower collapse at 6 cubes wasn't scripted - it just happened in the sim. Same seed, same crash, every time.
Headless sims run in seconds. We render the interesting ones.
One thing that almost killed us: default MuJoCo contacts couldn't hold a tower past 5 cubes. Stiffer contacts + implicitfast integration fixed it. Physics sims lie if you don't tune them.
This is the rehearsal stage. Same twin gets us VR teleoperation debugging, choreography validation before we move metal, and a shared language between code and hardware.
The policies that actually race will come from VR demos on the real arms.