🦾Misty arm

It was a must for Misty to have a telescopic robotic arm, to give her even more degrees of freedom and the ability to grip or bring around several objects!

On this page, you will be able to download the .stl files containing the models for 3D printing your Misty arm.

.stl files:

338KB

arm.stl

Open

257KB

gear.stl

Open

221KB

mobile.stl

Open

arm

gear

mobile

Adjustments

The front part of the arm has been developed to be completely customized.

In fact, we want to have the possibility to have different tools but not to print a new arm every time. To solve this we inserted a negative M - of Misty - where you can put the front part that suits your needs better. For example, we chose to insert this gripper - I modified the size of the two gears of the gripper to 103% to have a better fit.

We modified the base of the gripper deleting the behind wall and inserting a positive M that matches with the mobile one.

Modified base of the gripper

2KB

M.stl

Open

M letter for matching pieces

80KB

base_gripper.stl

Open

The servo motors that we'll use in this project are the positional SG90.

Assembly

1. Prepare the new arm - Screw the SG90 servo motor in the arm with the small gear towards the outside part. - Slice the mobile part in the arm. - Insert the gear in the servo motor (the gear will rotate in the middle part of the rail, so you don't need to insert it from the very beginning of the gear) - Insert your front part in the mobile.

2. Screw the new arm - Unscrew the old arm. - With the same screw insert the new 3d printed arm.

arm

mobile part and gear

complete arm

Pictures

arm extension

side picture with cup holder

arm

standard position