May 6, 2020

This is a big crawler crane. I use 3 motors, a medium motor for turning and a large motor for the lifting arm and hooks. There are two hooks, a main hook and an extra hook, which you can switch manually. It also has a system so that the rope cannot fall down when switching. The touch sensor on the fixed arm serves as a safety lock. When the lifting arm reaches its maximum height, an alarm is triggered.

I made my own app to operate the crane. I made it through the free site of MIT App Inventor. Highly recommended to make your own apps.

Click here to download my app for free. It is an apk file so it is only available for Android.

Or change it here as desired.

Click here for the building instructions. You need Lego Digital Designer. Click in the top right on "building guide mode" or press "F7".

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