We tested carbon-fiber reinforced PET, PETG and PLA filaments against standard PLA and PETG — flexural stiffness, shape retention at 65–70 °C, creep under sustained load and Izod/Charpy impact — to find which material really suits structural robotic arm parts, and where annealing helps or hurts.
We bench-tested five popular smart serial servos — STS3215, STS3235, STS3250, HLS3930M and HLS3950M — for peak torque, current draw, temperature rise under load and backlash, then compared the results against the datasheets to find the best fit for real robot joints.
Empirical thermal load testing of two Waveshare serial-bus servo driver boards across four scenarios (2 A / 10 min, 5 A / 5 min, 7 A / 2 min, 10 A / 30 s) at 12 V. Compares barrel-jack vs screw-terminal power paths.
This work presents a practical backlash compensation method for Feetech STS3215 servo actuators using a dual-motor configuration with controlled pretension. Experimental results show a reduction of effective output backlash from 14.78 encoder counts (approximately 1.30◦) to 1–2 counts (approximately 0.09◦ to 0.18◦), approaching encoder resolution limits. The method does not require mechanical…
This study presents topology optimization of a robotic manipulator using the SIMP algorithm to increase structural rigidity while maintaining mass constraints. Through finite element analysis and iterative optimization of aluminum and steel brackets, significant stiffness improvements were achieved—reducing tip displacement by 57-76% across all loading directions.
Comprehensive empirical evaluation of the Feetech STS3250 serial bus servo motor. Performance testing reveals 2-3% deviation from rated speed, excellent positional repeatability (±0.02 mm), and mechanical backlash within 0.5° specification. Includes detailed analysis of torque output, thermal behavior, and dynamic load response.
A detailed look at the Feetech STS3215 servo — exploring its real-world performance, precision, and control behavior. We analyze how this affordable, feature-rich servo performs under practical load, speed, and accuracy tests, revealing insights valuable for robotics and motion-control design.
A gripper is a mechanical or robotic device designed to grasp, hold, manipulate, or transport objects. It serves as the “hand” or end-effector of a robotic arm or automation system, allowing the robot to interact with the physical world by gripping and releasing objects.
I want to discuss how the selection of the most important component of the robotic manipulator – the electric motors – took place.
In May, we completed the first variation of the Robo 9 design, showcasing its evolution from initial concept to final structure. The design features a matte black frame, dual manipulators, a balancing mechanism, and advanced sensors like LiDAR and depth cameras. Updates include heavy-duty batteries for stability, front lights, and an improved user-friendly layout. Stay tuned for the final design!