How Can I Achieve Precise Rapid Rotation in My Mechanical Project?

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SUMMARY

The discussion focuses on achieving precise rapid rotation in a mechanical project using a stepper motor. The user aims to rotate an inner tube (35mm long, 20mm diameter) within an outer tube (21mm diameter, 80mm length) one full turn in 0.05 seconds, allowing for up to 15 rotations per second. The project requires a precision of +/- 0.5mm for positioning and involves a load of approximately 30g. Recommendations include exploring off-the-shelf stepper and servo drivers, as well as DIY resources on platforms like Instructables and Hackaday.

PREREQUISITES
  • Understanding of stepper motor specifications and operation
  • Familiarity with servo motor drivers and their applications
  • Basic knowledge of mechanical design principles
  • Experience with timing and control systems in mechanical projects
NEXT STEPS
  • Research specific stepper motor models suitable for high-speed applications
  • Learn about servo motor drivers and their integration with microcontrollers
  • Explore timing control techniques for precise motion in mechanical systems
  • Investigate DIY projects on Instructables and Hackaday for similar mechanical designs
USEFUL FOR

Mechanical engineers, hobbyists working on robotics, and anyone involved in precision motion control projects will benefit from this discussion.

longshot
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Hi all

Im very new to all of this and require help and guidance with my project.

The aim of my project is to rotate an inner tube (35mm long 20mm diameter) within another tube (21mm diameter - 80mm length) one full 360' turn and then stop in 0.05 seconds, ready for the next command. If the user can press the button 15 times a second it will turn 15 times (0.05 per turn).


Ive been reseaching stepper motors but not sure if they are the right "tool" to use.

Can you please suggest a method how I could preform this motion.

I have created a model of what I need and have used a cordless drill as the "engine" to turn the parts and the method works. Now I just need to scale the "engine" into the body of the object.

thanks in advance.

appologise if this is in the wrong forum.
 
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How precise must the motion be with respect to rotation and time?
What is the load? (How much weight is spinning around?)
Will it be in continuous use, or is it just for a demonstration?

There are a number of off-the-shelf stepper/servo drivers in a wide price range. Depending on how much you want to learn, you can find quite a few plans on instructables.com, hackaday.com, and other DIY sites.
 
hi pantaz

thx for the quick reply and sites.

How precise must the motion be with respect to rotation and time?

The time must be able to do about 20 rotations per second if required. With regards to the rotation, it must be able to start in "A" position and finish in "A" +/- 0.5mm

What is the load? (How much weight is spinning around?)

the weight is +/- 30g

Will it be in continuous use, or is it just for a demonstration?

the final product will be used for 15 - 20 minute intervals over 4 hour period or longer.
 

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