branikita (Nikita Bragin)

reactedto their post with 🔥 about 23 hours ago

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78

Our paper is now published in HardwareX!

"An open-source test stand for backlash measurement in low-cost UART servo motors" presents a ~$100 automated platform for measuring backlash in compact serial bus servos — no dial indicators, no probe contact force, fully scripted and repeatable.

All CAD files, control software, and analysis tools are open source.

Read the full article: https://www.hardware-x.com/article/S2468-0672(26)00027-1/fulltext

Appearing in HardwareX Volume 26 (June 2026): https://www.sciencedirect.com/journal/hardwarex/vol/26/suppl/Cf

posted an update about 23 hours ago

Post

78

Our paper is now published in HardwareX!

"An open-source test stand for backlash measurement in low-cost UART servo motors" presents a ~$100 automated platform for measuring backlash in compact serial bus servos — no dial indicators, no probe contact force, fully scripted and repeatable.

All CAD files, control software, and analysis tools are open source.

Read the full article: https://www.hardware-x.com/article/S2468-0672(26)00027-1/fulltext

Appearing in HardwareX Volume 26 (June 2026): https://www.sciencedirect.com/journal/hardwarex/vol/26/suppl/Cf

reactedto their post with 🚀 5 days ago

Post

2569

We added multi-simulator support for our parallel gripper on the SO-ARM 100/101 arm. One URDF, one launch file, five physics engines: Gazebo, MuJoCo, Webots, CoppeliaSim, Isaac Sim.

The ROS2 package includes xacro descriptions, joint trajectory controllers, robot state publisher, and parameterized hardware interfaces for each simulator.

https://github.com/roboninecom/SO-ARM100-101-Parallel-Gripper

posted an update 5 days ago

Post

2569

We added multi-simulator support for our parallel gripper on the SO-ARM 100/101 arm. One URDF, one launch file, five physics engines: Gazebo, MuJoCo, Webots, CoppeliaSim, Isaac Sim.

The ROS2 package includes xacro descriptions, joint trajectory controllers, robot state publisher, and parameterized hardware interfaces for each simulator.

https://github.com/roboninecom/SO-ARM100-101-Parallel-Gripper

reactedto their post with 🔥 18 days ago

Post

3069

We have received the majority of components for our first small commercial batch of SO-ARM101 robotic arms. Feetech STS3250 servo drives, parallel gripper, and depth camera.

1 reply

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posted an update 18 days ago

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3069

We have received the majority of components for our first small commercial batch of SO-ARM101 robotic arms. Feetech STS3250 servo drives, parallel gripper, and depth camera.

1 reply

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reactedto their post with 🔥 20 days ago

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5622

Progress update on our Robonine mobile robotic platform. We've wired up the full electronics stack - Raspberry Pi, motor controllers, and a camera module - and added Bluetooth joystick and keyboard control with WiFi-based management. A 7 kg counterweight keeps the platform stable. Powered by a powerbank and ready to roll.

1 reply

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posted an update 20 days ago

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5622

Progress update on our Robonine mobile robotic platform. We've wired up the full electronics stack - Raspberry Pi, motor controllers, and a camera module - and added Bluetooth joystick and keyboard control with WiFi-based management. A 7 kg counterweight keeps the platform stable. Powered by a powerbank and ready to roll.

1 reply

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repliedto their post about 1 month ago

I'm not familiar with it.

reactedto their post with 🚀 about 1 month ago

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1869

Robonine just published a new article! Mechanical backlash is a common limitation in servo-driven robotic joints. In this experiment, paired Feetech STS3215 servos are used with a small opposing preload to eliminate gearbox play, significantly improving positional stability and motion precision in robotic manipulators.

https://robonine.com/backlash-compensation-in-sts3215-servo-actuators/

2 replies

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posted an update about 1 month ago

Post

1869

Robonine just published a new article! Mechanical backlash is a common limitation in servo-driven robotic joints. In this experiment, paired Feetech STS3215 servos are used with a small opposing preload to eliminate gearbox play, significantly improving positional stability and motion precision in robotic manipulators.

https://robonine.com/backlash-compensation-in-sts3215-servo-actuators/

2 replies

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reactedto their post with 🚀 about 1 month ago

Post

4100

Testing a parallel gripper with a MaixSense-A010 ToF depth camera (100-point sensor) and pressure sensors.

By combining depth data with force feedback, the gripper closes only when the object is in a graspable position. If the object slips or leaves the grasp zone before closing, the system can automatically retry — as shown in the video.

Gripper repository (version without camera and sensors):
https://github.com/roboninecom/SO-ARM100-101-Parallel-Gripper

1 reply

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posted an update about 1 month ago

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4100

Testing a parallel gripper with a MaixSense-A010 ToF depth camera (100-point sensor) and pressure sensors.

By combining depth data with force feedback, the gripper closes only when the object is in a graspable position. If the object slips or leaves the grasp zone before closing, the system can automatically retry — as shown in the video.

Gripper repository (version without camera and sensors):
https://github.com/roboninecom/SO-ARM100-101-Parallel-Gripper

1 reply

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reactedto their post with 🚀 about 1 month ago

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1536

We tested our 3D-printed parallel gripper for the SO-ARM100/101 robotic platform, successfully handling a 1.5 kg payload. The gripper features a 100.5mm full stroke and ±0.05mm repeatability — all for around $76 in parts and 30 minutes of assembly.

Full source code, STL files, and assembly guide are open-source and available on GitHub: https://github.com/roboninecom/SO-ARM100-101-Parallel-Gripper

posted an update about 1 month ago

Post

1536

We tested our 3D-printed parallel gripper for the SO-ARM100/101 robotic platform, successfully handling a 1.5 kg payload. The gripper features a 100.5mm full stroke and ±0.05mm repeatability — all for around $76 in parts and 30 minutes of assembly.

Full source code, STL files, and assembly guide are open-source and available on GitHub: https://github.com/roboninecom/SO-ARM100-101-Parallel-Gripper

reactedto their post with 🚀 about 2 months ago

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1530

Our engineer Alan Subin from Robonine has started preparations for testing the manipulator on the mobile two-wheeled platform.

2 replies

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posted an update about 2 months ago

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1530

Our engineer Alan Subin from Robonine has started preparations for testing the manipulator on the mobile two-wheeled platform.

2 replies

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reactedto their post with 🔥 about 2 months ago

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1661

Our colleague Vladimir Osipov equipped the SO-ARM100 parallel gripper with FSR402 force sensors to enable delicate object handling with real-time grip force feedback. The sensor detects forces as low as 0.2N, while the target grip force is tuned per object — around 5N for a cherry tomato — to account for the limited torque precision of STS3215 servos and prevent slipping. This allows the gripper to grasp soft objects gently, detect slippage, and automatically retry the grip.

Github of the parallel gripper: https://github.com/roboninecom/SO-ARM100-101-Parallel-Gripper

1 reply

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posted an update about 2 months ago

Post

1661

Our colleague Vladimir Osipov equipped the SO-ARM100 parallel gripper with FSR402 force sensors to enable delicate object handling with real-time grip force feedback. The sensor detects forces as low as 0.2N, while the target grip force is tuned per object — around 5N for a cherry tomato — to account for the limited torque precision of STS3215 servos and prevent slipping. This allows the gripper to grasp soft objects gently, detect slippage, and automatically retry the grip.

Github of the parallel gripper: https://github.com/roboninecom/SO-ARM100-101-Parallel-Gripper

1 reply

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reactedto their post with 🚀 about 2 months ago

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2929

We stress-test the FEETECH STS3215: real backlash (0.87° measured vs spec), repeatability, speed accuracy, stall torque above rating, and thermal overload behavior under continuous load. Practical implications for robot arms and grippers.

Full video: https://www.youtube.com/watch?v=UN5_fZVSWcw

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Nikita Bragin PRO

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