machine and manufacturing
Analysis: break out the case of waves more than previously encountered, but the most common cause signal interference, the interference signal amplitude mirror main factors acousto-optical drive laser power, the role of outside interference power fluctuations on the galvanometer search from the source. If you can not try to open the laser power driver when scanned with a light indicating whether the lines presented linear wavy lines. In the case of determining the preceding steps do not interfere, the first pneumatic laser power, see if there is a wave phenomenon. Then the output power of the laser power is gradually increased, observe describe out lines. Finally, the sound of the starter drive is to observe the wave phenomenon in which step it is possible to determine the basic interference from which part. After identify the source of interference, again trying to solve the interference approach.