Researched by Riley Hart · based on SunFounder GalaxyRVR build guide and docs · we may earn a commission
The leg joints are too tight to swing. Start with this: Loosen each leg joint nut a quarter turn with the cross wrench.
The leg joints are too tight to swing.
Tighten the self-locking nut fully with the cross wrench, then loosen it a little so the plate can swing. Do this on every joint from the last 7 screens.
Tip: This is what lets your rover climb bumps like NASA rovers. Stiff joints mean it gets stuck.
Check: Each leg swings by itself when you lift the body. Nothing wobbles loose.
Common mistake: Leaving joints tight. A stiff leg makes the rover tip over on bumps.
Open step 11 in the free build tool, tap Stuck and take a photo. The coach checks it against that exact step and tells you what to change. 3 free questions per kit.
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