Driving analog galvo scanner

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2 years 9 months ago #290248 by MAF
Replied by MAF on topic Driving analog galvo scanner
It works.
Attached are my setup, and oscilloscope screens.
The laser scaned 11 lines.
I can't post schemetics or verilog code here, sorry.
But it's all straight forward till now.

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2 years 9 months ago #290250 by MAF
Replied by MAF on topic Driving analog galvo scanner
Reading the data sheet I feel AD5422 shall be able to work at 100 ksps, but I can only make it work at up to 60 ksps.
With higher feed rate it ceases to respond to the data stream. Any comment would be appreciated...

The DAC generates negative spikes during transitions. I'm considering adding active filters to the circuit.
But then the output accuracy may be affected by the filters.
If feedback of DAC is obtained after filters, it might oscillate. And some extra effort will be needed.
 

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2 months 3 weeks ago #348516 by farley
Replied by farley on topic Driving analog galvo scanner
Hi, I saw your post about the SL2-100 interpreter — I'm an FPGA engineer working on decoding the same protocol and finding solid documentation is really tough. Would you mind sharing how far you got, or any pointers on the frame structure / encoding you figured out? Totally understand if it's not shareable. Wishing you smooth progress on the project either way!

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2 months 3 weeks ago #348519 by tommylight
@farley,
No double posting.

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