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Also, I'll be using a basic PWM DAC with a low pass RC filter. Do I need to take any major precautions agains 50Hz interference, or will everything be ok?
So... should I use a TRIAC to control them (obviously using something like a MOC3041 or the likes), which would make for easier and faster implementation, or should I use a relay, in which case I need to figure out how to mount the thing?
PWM, 3 paint guns... I smell a "dial-in" CMY multicolor paint gun project
Well... no. I'm working on a rig for penetrant liquid defectoscopy (that sounds weird in English...).
I didn't find any clear explanation, just a bit here and there, so maybe I have a rough idea of what it is or perhaps I'm just guessing.
The principle is the following (more or less):After you pass a part through a process (welding, molding, etc), micro cracks could form. To detect them, you first apply a penetrant liquid to the surface of the part. This liquid, as the name implies, penetrates those micro cracks. After washing away the excess liquid, you add a developing liquid, which usually is white. The result is that you would end up with a white surface with red spots where micro fissures are on the part.Anyways, for this project I'm mainly taking care of the automation side of things. Some other people are taking care of the actual process.