This can be used for liquid measurments/precision feeding, its not medical or cyber junkie equipment

My another project with optical drive parts... I was asked if these stepper motors would have enough force to move a syringe so I decided to test it.And as you can see, they can and do it well.This frame is designed for 5ml syringe, with stepper motor there is possible great resolution to achieve.Only 3 parts to print.There is no need to use slide bushes/linear bearings in this model

Here you can see how it works: https://youtu.be/YdeZJIZdA_A

Parts needed from optical drive:

• stepper motor
• linear shaft

Other parts:

• syringe - im using "diconex 5ml 3 part syringe", I don't know if they are available in other countries, if not there is model which should have same size: https://s.click.aliexpress.com/e/_AmWxks
• mouse limit switches - im using these, model D2F-L3.They are optional and required only if you would need to have some feedback from device https://s.click.aliexpress.com/e/_DC4Xs5b

Assembly guide:
1.If you want some feedback, install the limit switches first and arrange the wires in the cable tray
2.Prepare the stepper motor.You will need to enlarge the holes to fit 2 x M3 screws.Use a
file or a drill
3.Mount stepper motor in frame (2 x m3 screws)
4.Put a "nut" element on the shaft and then mount both in frame.Use glue on the ends of the shaft after mounting
5.Mount the syringe
6.Mount the 3d printed cover

Step files: https://drive.google.com/drive/folders/15hBmwcTsdyuNpl26fW6vpWW03Bi_1gVF?usp=sharing