If you’re not used to control theory and inverse dynamics it’s quite tricky to control it (especially at 0.25mm) and you’ll never get to actually use it to perform what you want.
You might have better luck with low-end industrial robots but the cheapest are $2500 and more.
(I’m similarly in the market if a product can prove me wrong, especially interested in something with some computer vision integration)
Maybe look into this? https://github.com/cyberbotics/webots
Original software for it is a bit hard to work with, improvements in https://github.com/ongdexter/ar3_core
https://www.youtube.com/watch?v=SioCwvR_PYY
How does this channel does not have more views is a real mystery to me.
I haven't documented anything yet, but I got the arm working with ROS/MoveIt! for kinematics. The code is here: https://github.com/lukeinator42/sainsmart_arm_ros. It uses cheap servos though so I don't think the accuracy is near 0.25mm.
Here's a video that shows the arm in action: https://www.youtube.com/watch?v=Yi_QydaN-34
I'm currently also building a Roboteurs RBX1 Remix arm that uses stepper motors, but it's not complete yet.