A good news, I bought a 6 axis robotic arm a few weeks ago, and I have 
implemented it to grab through serial touch screen and arduino uno.

https://www.youtube.com/watch?v=WmcIOdKB61g

Recently I built a robot;, and I found great assistance in researching 
and gathering insights from online communities like reddit robotics 
forums. Members shared recommendations and personal experiences, 
steering me towards small and affordable options like the uarm swift 
pro. Here I found the resnable price. You check. I hope this will be 
helpful for you.