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???
05/01/09 22:46
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 		 #164998 - In order to have high speed, you must have low mass
Responding to: ???'s previous message
What do you mean by points per second?

You believe you can sweep your laser across the diagonal of a 3 x 4 meter surface with resolution, of, say, 2 mm, in 50 microseconds, stop, and turn around and do it again? Do you think that's fast enough to illuminate ANY point on that area sufficiently to make it seem static in a darkened room?

I'm concerned about the mechanical limitations. The loudspeaker voice coil is allowed to "float" in the gap in the speaker magnet, supported by the surround (the elastic gasket around the cone), which makes it difficult to control its absolute position within that gap. OTOH, the HDD voice-coil mechanism is very precisely fixed.

The motion of the neither "voice-coil" mechanism is linear with respect to current or voltage. Fortunately, they are predictable.

RE








List of 55 messages in thread
TopicAuthorDate
Circuit name for a "servo"            01/01/70 00:00      
   Something like that?            01/01/70 00:00      
   Specific vs General            01/01/70 00:00      
      Servo motor            01/01/70 00:00      
         Context            01/01/70 00:00      
            Equivalent is a strong word            01/01/70 00:00      
            yebbut            01/01/70 00:00      
            Yes, it's just another misnomer            01/01/70 00:00      
   To move data transfer between One proccessor to another one            01/01/70 00:00      
      I have never hear that            01/01/70 00:00      
         Typo ?            01/01/70 00:00      
   I misnamed what I want + info            01/01/70 00:00      
      Open-loop            01/01/70 00:00      
         I've got an old voice-coil FDD ...            01/01/70 00:00      
            Voice coils in HDD for quite some time            01/01/70 00:00      
      Look at commercial stuff for inspiration            01/01/70 00:00      
         Hinged mirror            01/01/70 00:00      
            What type of hinge            01/01/70 00:00      
               What Chico has is several angular options            01/01/70 00:00      
                  silicone            01/01/70 00:00      
                     That might work ...            01/01/70 00:00      
                        Precision relative to amount of modulation            01/01/70 00:00      
                           I don't quite see it            01/01/70 00:00      
                              At least two alternatives            01/01/70 00:00      
                                 There's another way ...            01/01/70 00:00      
                                    Rotating mirrors of limited use            01/01/70 00:00      
                                       Link about hazards            01/01/70 00:00      
                                          Safety First!            01/01/70 00:00      
                                             Today, rasters are hard for microcontrollers            01/01/70 00:00      
                                                Not necessarily! They don't have to be involved ... much.            01/01/70 00:00      
                                                   Easy first when all parts of the chain are easy            01/01/70 00:00      
                                                      It depends on how much you want to draw            01/01/70 00:00      
                                                         Still pushing rotating mirror, ignoring the problems            01/01/70 00:00      
                                                            Per, I think you've lost your way            01/01/70 00:00      
                                                               Stampede            01/01/70 00:00      
                                                                  One thing at a time            01/01/70 00:00      
                                                                     Finally noticing the lack of information from the OP?            01/01/70 00:00      
                                                                        GREAT links            01/01/70 00:00      
                                                                        It's about what people already are doing            01/01/70 00:00      
                                                                           Not DIY            01/01/70 00:00      
                                                                              Let's consider the commercial products.            01/01/70 00:00      
                                                                                 The man who rejected video uses video as his example...            01/01/70 00:00      
                                                                                    You mistake my viewpoint            01/01/70 00:00      
                                                                                       Chico might care            01/01/70 00:00      
                                                                                          The reason I don't care ...            01/01/70 00:00      
                                                                                             I wouldn't be surprised if Chico has a working projector            01/01/70 00:00      
                                                                                 Where ?            01/01/70 00:00      
                                                                                    8 angled mirrors...            01/01/70 00:00      
                                                                                       Ah.            01/01/70 00:00      
                                                plot rates            01/01/70 00:00      
                                                   Probably better than average, unless small angle            01/01/70 00:00      
                                                      In order to have high speed, you must have low mass            01/01/70 00:00      
         Homebuilt laser projector            01/01/70 00:00      
            EXCELLENT!            01/01/70 00:00      
               Yes, excellent            01/01/70 00:00      

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