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Klaas Robers wrote:Gregory, be extremely careful with 50 mW lasers. That light output is really dangerous. I would advise you to do all your experiments with a 5 mW laser diode. Although this is also not absolutely safe, it is 10 times less dangerous.
As long as the system is scanning, there will be no problem. But during building and experimenting you want to have the scanning off for adjusting and measuring. Then a 50 mW focused beam is far too dangerous and 5 mW is also bright enough to see what is happening.
Then finaly, if everything is tuned up, you might construct a scanning detector, such that when the scanning stops for whatever reason, the laser is switched off automatically. After that precautions you might replace the laser for a 10 x brighter result. And NEVER bridge the built scanning detector safety.
gary wrote:You may have to go to a xtal controlled oscillator to get the required scan frequency accuracy in the final product, but this type of circuit should be fine for a first iteration.
Gregory wrote:gary wrote:You may have to go to a xtal controlled oscillator to get the required scan frequency accuracy in the final product, but this type of circuit should be fine for a first iteration.
Hi Gary, Are there any oscillator circuits, not too complicated that allow the frame scan oscillator to be synchronised to the frame sync, I can have a VCO if needed for the stepper driver.
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