After learning how to build the Gripping Fingers mechanism from THE LEGO MINDSTORMS EV3 IDEA BOOK, twe took note of the author Yoshihito Isogawa’s recommendation to use the EV3 Unregulated Motor Block instead of the standard ones to prevent overextending. His suggestion was very interesting to us. we decided to test the Unregulated Motor Block alongside the standard Medium Motor Block in our program. In this post, we will share our experience with using the Unregulated Motor Block.
Gripping Fingers Attachment
Based on the book mentioned above, we built a Gripping Fingers mechanism as shown below.
We attached the Gripping Fingers attachment to our programming robot as shown below. The Gripping Fingers attachment was powered by a medium motor.
Gripping Fingers Programming Using Medium Motor Block
At first, we used the standard Medium Motor Block to open and close the gripping fingers, as shown below. We would like to open and close the Gripping Fingers 5 times through a Loop block. We found that it over extended and our program stalled at the first Medium Motor block.
Gripping Fingers Programming Using EV3 Unregulated Motor Block
To avoid over extending and stalling, we tried EV3 Unregulated Motor Block as shown below. This time, it worked well!
The following video shows the Gripping Fingers in action.
If you’re interested in FLL robot design, please check out our robot design principle posts.