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Author Topic: Microphonestand-robot  (Read 259 times)

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Offline GededyrTopic starter

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Microphonestand-robot
« on: July 18, 2014, 06:19:27 AM »
Hi. I'm new here, and have never build a robot, but I'm good with electronics and soon educated electro-mechanic (don't know the title in english).
Also I'm an audio engineer and i'm constantly ripping my hair off when I record electric guitars because I have to run from the control-room to the recording room every time I need to place the microphone a cm to capture the best sound.
I saw an other engineer that had build a microphone-robot.. A micophone stand that stood ontop of a little table that could moove to the front, back and to the sides, and something like that is exactly what I need.

How do I build something that can hold a microphone and moove it around a little, so I can moove the microphone from the control-room?

Offline DiegoChavez

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Re: Microphonestand-robot
« Reply #1 on: July 21, 2014, 09:19:17 PM »
Is it jsut the mic. or do you have to carry something else on the robotic platform?

Offline GededyrTopic starter

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Re: Microphonestand-robot
« Reply #2 on: July 22, 2014, 02:31:29 AM »
It's just the microphone I need to move. Well, the mic need to be held steady and in a useful position. Just like a microphone stand :)

Offline DiegoChavez

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Re: Microphonestand-robot
« Reply #3 on: July 23, 2014, 06:17:37 PM »
What I would do Is get some high torque low speed motors and put them in a square frame. about 4 inches biger than the diameter of a mic. stand then get an aluminium sheet for the top and drill 2 holes and other 2 holes on the mic. stand and then bold them together. If you need help with the design and materials send me an email at: [email protected].

Offline bdeuell

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Re: Microphonestand-robot
« Reply #4 on: July 23, 2014, 08:31:10 PM »
Not to throw added complication at someone building their first robot but....this might be a good application for an omni-directional platform.
Here are some links:
https://www.youtube.com/watch?v=Z0lUTMBbu9A
https://www.youtube.com/watch?v=9GQ0lPGDC1w
http://www.robotshop.com/en/3wd-100mm-omni-directional-kit.html

Is noise a concern? Most motors/drives are going to produce audible noise.

How do I build something that can hold a microphone and moove it around a little, so I can moove the microphone from the control-room?
Not exactly sure what you are asking for...perhaps you can be a little more specific. Are you wondering what a system to do this would need, looking  for ideas, or need help designing and finding specific components?

Offline DiegoChavez

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Re: Microphonestand-robot
« Reply #5 on: July 23, 2014, 10:21:05 PM »


omni directional wheels are definitly a great idea. the robot marketplace sales some good ones, (I have used them for one robot and they work well) . here is the link: http://www.robotmarketplace.com/products/omni_directional_wheels.html



Offline GededyrTopic starter

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Re: Microphonestand-robot
« Reply #6 on: July 24, 2014, 07:00:39 AM »
What I would do Is get some high torque low speed motors and put them in a square frame. about 4 inches biger than the diameter of a mic. stand then get an aluminium sheet for the top and drill 2 holes and other 2 holes on the mic. stand and then bold them together. If you need help with the design and materials send me an email at: [email protected].


That is a great idea!

But I thought about the design a little, and came across the idea of building a robot arm like this: http://www.dfrobot.com/index.php?route=product/product&path=37&product_id=192#.U9DoCfmqmFW
but with this http://www.thomann.de/gb/km_19695_300.htm instead of the robot hand, to mount the microphone.

Thanks for the email. I might write you a mail :)

Not to throw added complication at someone building their first robot but....this might be a good application for an omni-directional platform.
Here are some links:
https://www.youtube.com/watch?v=Z0lUTMBbu9A
https://www.youtube.com/watch?v=9GQ0lPGDC1w
http://www.robotshop.com/en/3wd-100mm-omni-directional-kit.html

Is noise a concern? Most motors/drives are going to produce audible noise.

How do I build something that can hold a microphone and moove it around a little, so I can moove the microphone from the control-room?
Not exactly sure what you are asking for...perhaps you can be a little more specific. Are you wondering what a system to do this would need, looking  for ideas, or need help designing and finding specific components?


How would you do the build with a omni platform?
Noise is not a concern because I will only do placement changes in the sound-check. the stand will be used for a guitar cabinet, witch will probably burst out 100dB of guitar tones.

In the studio I sit in the control-room with the mixing desk and the speakers, and in another room will the guitar cab. play. So I need to control the robot stand from the control room to hear the changes in the sound
« Last Edit: July 24, 2014, 07:08:53 AM by Gededyr »

Offline bdeuell

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Re: Microphonestand-robot
« Reply #7 on: July 24, 2014, 10:05:29 AM »
Are you looking at building an arm instead of a mobile platform, or in addition to?

The omni directional platform is not very difficult to build mechanically (with the exception of the wheels...which I assume you would buy). Essentially you mount geared motors with an omnidirectional wheel on each at angles to each other, 90 degrees apart for a 4 wheeled version and 120 degrees apart for a 3 wheeled version. the rollers on the omni-wheels allow them to slide freely in the direction perpendicular to their driving direction. By driving each wheel at a particular velocity you can make the robot move in any direction and rotate all at once. The control part is a little more challenging but i'm sure there are tutorials out there that explain it as well as members here that would be willing to help. Essentially you would need an algorithm to calculate the required motor speeds to make your platform move in the desired direction...this isn't overly complicated just a little geometry and trig.

I think I have a good idea what you are trying to accomplish, what isn't clear to me is what kind of help you are asking for.

Some questions I have is will you need to be able to drive over obstacles such as cables/wires on the ground? Also how much weight will you need to carry, i know most mic stands have a heavy base for stability, can you get away with a much lighter structure to hold the mic?

Offline GededyrTopic starter

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Re: Microphonestand-robot
« Reply #8 on: July 25, 2014, 01:17:10 AM »
I think my idea with the robot arm is what I need.
Now my concern is how to control it. It would be great to have the ability to take the robot with me. I work in different studios around, so I need to take it with me to the studio, and set it up pretty quickly, and control it via wifi maybe. some kind og wireless control would be the optimal.

So my vision for the robot is, I go to the studio with the robot in my bag or car, then I go to the recording room with a guitarist and hes guitar amp. I place the robot in front of the guitar amp and place a microphone on the robot-stand and gives the robot some power, then I go to the monitor-room/control-room and set up my control-surface (maybe my mac pro), connects to the robot, and then I'm good to go and ready for the sound check. Here I let the guitarist play through hes guitar amp and I listen to the microphone and move the microphone around the speaker on the guitar amp. I only need to move the mic some inches, so it wont run over any cables or so. When I've found the perfect spot for the microphone, I'll just let the microphone be where it is and press "record" :)

I hope that resolves any misunderstandings.

Offline GededyrTopic starter

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Re: Microphonestand-robot
« Reply #9 on: July 25, 2014, 06:56:29 AM »
I really hope I'm not insulting anyone with my bad Paint-skills, but I made a little picture of my idea.. http://imgur.com/76wRgP6

If the microphones angle (horisontal) could be maintained regardless of how I moove the arm and could be controlled by a single joystick, that would be great! In my mind it would just be a matter of programming, or am I wrong?

 


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