RoboMaster gimbal packaging | Mergen Ulziibayar

500 RPM prototype test

Maintained 20.5 mm feed-path clearance in a 500 RPM prototype test by packaging a 78.0 mm PLA wheel and replacing press-fit-only retention with an M3 fastener.

RoboMaster gimbal packagingFull-size image Image source

results and contributions

Test speed	500 RPM
Flywheel OD	78.0 mm
Flywheel mass	~0.13 lb
Feed-path clearance	20.5 mm
Retention	M3 screw added

The prototype ran at the DJI M2006 motor's 500 RPM condition with about 20.5 mm feed-path clearance maintained and the revised M3-retained motor interface installed.

Onshape simulation supplied preliminary structural screening for the 500 RPM condition.

Hardware repository

figures and hardware

Open any image at full size. Source links identify the retained revision.

Physical gimbal assembly with the printed launcher hardware installed — **Physical Assembly.** Printed launcher hardware installed in the gimbal for the 500 RPM checkFull-size image Image source

**CAD.** CAD packaging of the launcher in the gimbal.Full-size image Image source

Preliminary Onshape von Mises stress plot of the flywheel — **Preliminary Onshape Simulation.** Preliminary Onshape screening of the flywheel at the 500 RPM conditionFull-size image Image source

**Project figure or CAD.** Launcher flywheel CAD.Full-size image Image source

**Project figure or CAD.** Historical preliminary flywheel stress screening.Full-size image Image source

**Project figure or CAD.** Supercapacitor enclosure packaging.Full-size image Image source

**Project figure or CAD.** Onshape structural screening of the flywheel.Full-size image Image source

design evolution

Earlier iterations and the changes they motivated.

Work	Engineering question	Approach	Outcome
Packaging and feed path	Launcher hardware risked interference inside the gimbal and along the projectile path.	Modeled the wheel, armor, and supercapacitor shell around the existing geometry while holding 20.5 mm clearance.	Package envelope set with feed interference removed.
Motor interface	Press fit alone was a weak retention assumption.	Revised the 0.122 in / 3.10 mm interface and added M3 screw retention from the flywheel base.	Retained wheel with higher assembly confidence.
Prototype test	The assembly needed a functional check before any higher-speed use.	Ran the wheel on the DJI M2006 at 500 RPM with Onshape screening as preliminary analysis.	Prototype-level operation confirmed; clearance held.

design problem

The printed wheel, supercapacitor shell and front armor had to clear the projectile path and each other within the gimbal. The motor interface also needed secure retention for the rotating prototype.

My contribution. Launcher-wheel CAD, supercapacitor enclosure shell, front armor packaging, feed-path clearance review, M3 retention revision, and 500 RPM test support.

methods and scope

This was a 500 RPM prototype test, not high-speed launcher qualification.

project record

Evidence	500 RPM prototype test
Status	Tested Prototype
Timeline	Feb. 2026 - Present
Role	Mechanical design, CAD packaging, prototype fabrication, clearance review, retention revision, and test support
Tools	Onshape, SolidWorks, FDM Printing, Onshape Simulation

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