In this instructable I will show you step by step how to make a robotic gripper. You may be wondering: What does it do? It is basically a robotic hand that slowly closes and if something touches the switch while it is closing it stops so it grips onto the object that presses the switch.
This instructable was originally going to be a celebration instructable for achieving 50 000 views overall 50 followers and 25 instructables but now I am almost at 75 000 views! Thank you everyone that is following me and everyone that views my instructables!
Update: Adafruit has posted this instructable in their blog: http://www.adafruit.com/blog/2014/10/10/build-a-si...
If you like this instructable then you should check out this one: https://www.instructables.com/id/DIY-Head-Mounted-D...
Step 1: Parts and Tools
Here are the parts and tools you will need to make this project:
Normally closed/ Normally open limit switch
USB A to B cable
Filament any colour PLA or ABS
Computer with Arduino IDE
Step 2: 3d Print Files
3d print this file:
Any colour will do but I chose black PLA.
Step 3: Assemble
First glue the servo onto the base piece. Then Assemble the parts together by gluing one of the "fingers" to the base piece as shown in the first image. Then slip the second "finger" onto the servo horn as shown in the second image.
Step 4: Wire Servo
Wire the servo's negative wire (brown) to the arduino's ground. Then wire the poitive wire (red) to the arduino's 5v pin.
Step 5: Mount Limit Switch
Glue the limit switch to the "finger" that is mounted to the base and not the servo. Make sure that when the grippers are together the switch is clicked. Wire the servo's data wire between the switch so that the limit switch so it is normally closed. Then wire the other pin of the switch to pin 9.
Step 7: Test
Test and see if it works. The gripper should open and close slowly. If it does place something into the gripper like a pencil and it should stay put. If you take out the pencil it should continue to open and close.
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