u/DjavanAce

I'm looking for a motor to generate small pressure pulses. Essentially a heartbeat simulator. This is a Black Pill project, not Arduino but close, and I guess I can go up to 12V, or maybe use a DC booster.

I've been looking at stepper motors, since that would allow me to shape the pulses at will, but i also need to generate from 40 to 200 pulses per minute (minimum, more would be ideal), and that is a big ask!

Do any of you know of a small stepper motor capable of that speed? I don't need much power, thankfully. Could maybe use a servo motor, if one is available at that speed.

However, since I suppose such speeds are impossible, or close enough (out of my budget), what are my alternatives?

One paper on the subject I'm studying has a DC motor drive a cam with the profile of a heartbeat pushing a bellows. Speed is not a problem, at worst you need to gear up your motor, but your cam fixes your profile, you cannot have irregular heartbeat, or miss a beat. That is an acceptable compromise.

The obvious choice would be an speaker or a solenoid actuator, but good luck getting a small speaker to reproduce a sub 5Hz waveform, and idk what ranges solenoids work at, but they may be too slow.

Another option I have analysed is gearing up an stepper, but I think that is not helpful. Imagine i move my stepper back and forth; with some gearing the amplitude of those movements is amplified (I could amplify strength too), but the number of back-and-forth oscillations per minute would be the same, would it not? (mechanics is not my main field)

So, I await your opinions!

I'm looking for a motor to generate small pressure pulses. Essentially a heartbeat simulator. This is not strictly robotics, but i guess I'm kinda simulating a body part. Robo-cardio, anyone?

I've been looking at stepper motors, since that would allow me to shape the pulses at will, but i also need to generate from 40 to 200 pulses per minute (minimum, more would be ideal), and that is a big ask!

Do any of you know of a small stepper motor capable of that speed? I don't need much power, thankfully. Could maybe use a servo motor, if one is available at that speed.

However, since I suppose such speeds are impossible, or close enough (out of my budget), what are my alternatives?

One paper on the subject I'm studying has a DC motor drive a cam with the profile of a heartbeat pushing a bellows. Speed is not a problem, at worst you need to gear up your motor, but your cam fixes your profile, you cannot have irregular heartbeat, or miss a beat. That is an acceptable compromise.

The obvious choice would be an speaker or a solenoid actuator, but good luck getting a small speaker to reproduce a sub 5Hz waveform, and idk what ranges solenoids work at, but they may be too slow.

Another option I have analysed is gearing up an stepper, but I think that is not helpful. Imagine i move my stepper back and forth; with some gearing the amplitude of those movements is amplified (I could amplify strength too), but the number of back-and-forth oscillations per minute would be the same, would it not? (mechanics is not my main field)

So, I await your opinions!

I'm looking for a motor to generate small pressure pulses. Essentially a heartbeat simulator. I've crossposted this to r/askElectronics because it's for an electronics project and I was not aware of this community beforehand.

I've been looking at stepper motors, since that would allow me to shape the pulses at will, but i also need to generate from 40 to 200 pulses per minute (minimum, more would be ideal), and that is a big ask!

Do any of you know of an small stepper motor capable of that speed? I don't need much power, thankfully. Could maybe use a servo motor, if one is available at that speed.

However, since I suppose such speeds are impossible, or close enough (out of my budget), what are my alternatives?

One paper on the subject I'm studying has a DC motor drive a cam with the profile of a heartbeat pushing a bellows. Speed is not a problem, at worst you need to gear up your motor, but your cam fixes your profile, you cannot have irregular heartbeat, or miss a beat. That is an acceptable compromise.

The obvious choice would be an speaker or a solenoid actuator, but good luck getting a small speaker to reproduce a sub 5Hz waveform, and idk what ranges solenoids work at, but they may be too slow.

Another option I have analysed is gearing up an stepper, but I think that is not helpful. Imagine i move my stepper back and forth; with some gearing the amplitude of those movements is amplified (I could amplify strength too), but the number of back-and-forth oscillations per minute would be the same, would it not? (mechanics is not my main field)

So, I await your opinions!

I'm looking for a motor to generate small pressure pulses. Essentially a heartbeat simulator. I'm not thinking this is a r/motors question because I need something I can finely control.

I've been looking at stepper motors, since that would allow me to shape the pulses at will, but i also need to generate from 40 to 200 pulses per minute (minimum, more would be ideal), and that is a big ask!

Do any of you know of a small stepper motor capable of that speed? I don't need much power, thankfully. Could maybe use a servo motor, if one is available at that speed.

However, since I suppose such speeds are impossible, or close enough (out of my budget), what are my alternatives?

One paper on the subject I'm studying has a DC motor drive a cam with the profile of a heartbeat pushing a bellows. Speed is not a problem, at worst you need to gear up your motor, but your cam fixes your profile, you cannot have irregular heartbeat, or miss a beat. That is an acceptable compromise.

The obvious choice would be an speaker or a solenoid actuator, but good luck getting a small speaker to reproduce a sub 5Hz waveform, and idk what ranges solenoids work at, but they may be too slow.

Another option I have analysed is gearing up an stepper, but I think that is not helpful. Imagine i move my stepper back and forth; with some gearing the amplitude of those movements is amplified (I could amplify strength too), but the number of back-and-forth oscillations per minute would be the same, would it not? (mechanics is not my main field)

So, I await your opinions!