Understanding Residual Flux and Inconsistent Rotation in Stepper Motors

AI Thread Summary
Residual flux may be affecting the stepper motor's ability to achieve consistent rotation after initial movement. The motor moves 5 degrees with the first 20 steps but only 2 degrees with subsequent inputs, indicating a potential issue with torque or speed. Skipping steps can occur if the stepping speed is too high, suggesting the need for a gradual ramp-up in speed. This inconsistency could also stem from mechanical resistance or electrical issues within the motor. Understanding these factors is crucial for optimizing stepper motor performance.
sandy.bridge
Messages
797
Reaction score
1
Quick question: I have a stepper motor that is 0.25 degrees per step, and so 4 steps is required for a degree. When we pump 20 steps into it, it moves 5 degrees. However, if we go to pump another 20 steps into it right after that, it does not move 5 degrees. Is it possible that residual flux is preventing it from fully rotating after the initial rotation?

An example of what will happen is as follows:

pump in 20 steps: get 5 degrees of rotation
pump in 20 steps: get 2 degrees of rotation
pump in 20 steps: get 5 degrees of rotation
pump in 20 steps: get 2 degrees of rotation

and so on
...

It seems to be consistent in that sense. Any clarification or insight would be appreciated.
 
Engineering news on Phys.org
Sometimes if you try to step it too fast it will skip steps. Also, you may need to ramp up the stepping speed because the motor can't go from zero to maximum speed instantaneously.
 

Thread 'How might electronics be different if AC voltage was 72V at 45 Hz?'

Hey guys. I have a question related to electricity and alternating current. Say an alien fictional society developed electricity, and settled on a standard like 73V AC current at 46 Hz. How would appliances be designed, and what impact would the lower frequency and voltage have on transformers, wiring, TVs, computers, LEDs, motors, and heating, assuming the laws of physics and technology are the same as on Earth?
View full post »

Thread 'What happens if shielded cable has a short to the shield?'

While I was rolling out a shielded cable, a though came to my mind - what happens to the current flow in the cable if there came a short between the wire and the shield in both ends of the cable? For simplicity, lets assume a 1-wire copper wire wrapped in an aluminum shield. The wire and the shield has the same cross section area. There are insulating material between them, and in both ends there is a short between them. My first thought, the total resistance of the cable would be reduced...
View full post »

Thread 'Why does the amperage go real high if there is a low voltage short?'

I used to be an HVAC technician. One time I had a service call in which there was no power to the thermostat. The thermostat did not have power because the fuse in the air handler was blown. The fuse in the air handler was blown because there was a low voltage short. The rubber coating on one of the thermostat wires was chewed off by a rodent. The exposed metal in the thermostat wire was touching the metal cabinet of the air handler. This was a low voltage short. This low voltage...
View full post »

Similar threads

How can I achieve higher speeds when running stepper motors?
Replies
5
Views
2K
Controlling a stepper motor-basic equipment
Replies
1
Views
1K
Stepper Motor Anatomy and Logic
Replies
2
Views
2K
What is the optimal voltage for a stepper motor?
Replies
5
Views
2K
B Move in Space without mass exchange
Replies
4
Views
1K
Induction motor windings, number of turns per phase and per pole
Replies
2
Views
4K
Stepper torque calculation to drive a solid cylinder
Replies
4
Views
2K
Which Stepper Motor Configuration is Best for a Homemade Guitar Pickup Winder?
Replies
1
Views
3K
Stepper motor just vibrates in CCW
Replies
3
Views
5K
Satellite Tracking-Stepper Motor
Replies
1
Views
3K

Hot Threads

Recent Insights

Back
Top