Audrino/microswitch and Zuma pitch

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petermontg
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Audrino/microswitch and Zuma pitch

Post: # 48497Unread post petermontg
Mon Nov 20, 2017 12:17 pm

Has anyone given any thought of controlling the Zuma pitch using audrino and micro-switching for non Neumann lathes?

It is possible to control all input voltages the Zuma needs to see from an audrino based system.

Obviously, there are some functions that the Zuma doesn't see from the Neumann lathes but I reckon those can be figured out elsewhere.


Any thoughts?

Best
Peter
Peter Montgomery
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markrob
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Re: Audrino/microswitch and Zuma pitch

Post: # 48498Unread post markrob
Mon Nov 20, 2017 12:56 pm

Hi,

What voltages are required? What is the range, resolution, and bandwidth? The Arduino can output mulitiple voltages via PWM and some output filtering, but it depends on the requirements of the Zuma if they will be acceptable. Do you have more info on the specs?

Mark

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petermontg
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Re: Audrino/microswitch and Zuma pitch

Post: # 48499Unread post petermontg
Mon Nov 20, 2017 1:14 pm

Hi Mark,

Thanks for the reply.

Required inputs to the computer:
1. Start status
2. Stop status
3. 33 status
4. 45 status
5. 16 status
6. 22 status
7. Left audio preview
8. Right audio preview
9. Base pitch

The status signals are logic 0 - 12vdc active low
Base pitch signal is analog 0 - 12vdc

Computer outputs
1. Lateral pitch (LL)
2. Vertical pitch (LV)
3. Depth (V)

Control outputs are 0 - 12vdc.

Obviously there is a bit of experimenting need......

I know the outputs of the Zuma feed back into the PS programmer but that section is another beast for another day.

Best
Peter
Peter Montgomery
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Ciuens
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Re: Audrino/microswitch and Zuma pitch

Post: # 48500Unread post Ciuens
Mon Nov 20, 2017 1:29 pm

What is the connection model? you have pictures ? I think it's easier to understand with pictures. :D

Cheers,

Ciuens Silva

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petermontg
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Re: Audrino/microswitch and Zuma pitch

Post: # 48502Unread post petermontg
Mon Nov 20, 2017 1:55 pm

Hi Ciuens,

Just dealing with "in theory" at the moment. It's just been bouncing around my head the past while.

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Peter
Peter Montgomery
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markrob
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Re: Audrino/microswitch and Zuma pitch

Post: # 48505Unread post markrob
Mon Nov 20, 2017 2:32 pm

Hi,

So are you looking at having the Arduino emulate the Zuma or just allow for manual override? I assume numbers 7,8, and 9 are analog inputs?

Mark

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petermontg
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Re: Audrino/microswitch and Zuma pitch

Post: # 48508Unread post petermontg
Mon Nov 20, 2017 3:09 pm

markrob wrote:Hi,

So are you looking at having the Arduino emulate the Zuma or just allow for manual override? I assume numbers 7,8, and 9 are analog inputs?

Mark
Manual override on the input side. Basically just to tell it what is been cut. Taking the place of a PS programmer I think is the right description.

Yes, 7, 8 & 9 are all analog inputs.
Peter Montgomery
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markrob
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Re: Audrino/microswitch and Zuma pitch

Post: # 48512Unread post markrob
Mon Nov 20, 2017 4:00 pm

Hi,

I'm not familiar with the PS as I have no direct experience with pro systems. I do have 30+ years of embedded microprocessor system design. So I might be able to help. The L&R preview are audio bandwidth signals. Are they needed in this application? The Arduino's are not powerful enough to process full bandwidth 16 bit audio. They do have a 10 bit ADC with multi-channel analog muxes present. So depending on the need, they could be put to use, but have limitations. The Arduino Mega has more on-board hardware than the Uno and might be able to do what you want, but I would need more info on the process that needs to be controlled to comment.

If its just a matter of sensing some 12Vdc logic inputs and sending some fixed (or user adjustable) analog voltages to the LL, LV, and V inputs, I think you are OK. You'll just need some level converters to deal with the 5V to 12V logic. The PWM's on the Arduino are limited by the system clock speed (16 Mhz for the Mega) and desired resolution/response time. For example, if you want 16 bit resolution (the max for the PWM), then the PWM frequency will be 244 Hz. (16Mhz / 65536). That would require a low pass filter in the 20 Hz range and probably much lower to remove ripple and obtain true 16 bit accuracy. The trade-off is PWM frequency vs. Resolution and bandwidth.

The other option would be to interface outboard ADC's and/or DAC's via I2C or SPI. Both are available on the Mega.

Hope that makes sense.

Mark

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petermontg
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Re: Audrino/microswitch and Zuma pitch

Post: # 48548Unread post petermontg
Fri Nov 24, 2017 8:55 am

So we have confirmed that it is indeed possible to control with Arduino in the absence of a PS66 for input signals.

Can someone who has more experience with the Neumann PS66 share some input (or output in this case)

Next stage, to find the voltages used.

What does the PS66 out for the given parameters to the onboard Neumann computer?

Parameters are :

1. Start status
2. Stop status
3. 33 status
4. 45 status


Best
Peter
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2bitcomputer
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Re: Audrino/microswitch and Zuma pitch

Post: # 48567Unread post 2bitcomputer
Sun Nov 26, 2017 12:15 am

Hello,

There might be some relevant info here:

https://www.lathetrolls.com/viewtopic.php?f=11&t=3294

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petermontg
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Re: Audrino/microswitch and Zuma pitch

Post: # 48570Unread post petermontg
Sun Nov 26, 2017 6:35 am

Thanks 2bitcomputer.

Luckily enough I have been in touch with Todd elsewhere and has confirmed the voltage information I was missing.

I can now proceed to mocking up a controller for this project.

I'll keep this updated as I progress.

Best
Peter
Peter Montgomery
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peter(at)petermontgomerymastering.com

Stereo cutter head wanted. Send email or smoke signals.

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