Tuning galvo's with a scope

[FourDee]

Hi guys,

I was just wondering ... how would one go about tuning galvos with a scope?

I was thinking : feed the galvos with a square wave, measure the input and take the output from PD or position output of the amp.

Problem is you would'nt know which 'ILDA' speed you're tuning to ...

[mixedgas]

Hi guys,

I was just wondering ... how would one go about tuning galvos with a scope?

I was thinking : feed the galvos with a square wave, measure the input and take the output from PD or position output of the amp.

Problem is you would'nt know which 'ILDA' speed you're tuning to ...

procedure for cambs is here, courtesy of Me, Myself, and I. Mixed in with some Laser Media stuff. Hosted by Skywise:

http://www.skywise711.com/lasers/reference.html

Steve

[FourDee]

Thanks! I'll give it a go

[-bart-]

I got this idea of mine that I got for ages.

One could write a relative simple tuning wizard application for a pc.
Connect the audio output to the amp inputs.
Connect the audio input to the amp feedback signals.
Then you could have a step by step procedure, that guides your through the tuning process.

[dar303]

Great idea!
But you would need a DC-coupled soundcard with decent outputs like a MOTU or a DIY USB DAC (Laserboy-style)

[-bart-]

Personally I think tuning to ilda standard cán be done without modification of the soundcard. You don't háve to use the 15/30k pattern per-se to yield the same results.

Tuning the step-response is the hardest part, you don't need the part bellow 200Hz or dc for that.