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I found these instructions on how to make a barn-door tracker a little better. http://www.garyseronik.com/?q=node/52 http://www.garyseronik.com/?q=node/52 I s
by paulornothing 12y ago
I found these instructions on how to make a barn-door tracker a little better. http://www.garyseronik.com/?q=node/52 http://www.garyseronik.com/?q=node/52
I suppose the micro-controller is nice, but if you only need one speed why bother.
Now I just need to get a DSLR instead of my Canon AE-1 Program.
- sucramb 12y agoThe precision of motion of a stepper motor is several magnitudes higher than a simple DC motor. For a project that needs weeks to execute I wouldn't save the few bucks for a micro.
- lake99 12y ago> precision of motion of a stepper motor is several magnitudes higher than a simple DC motor Depends on whether we're talking about open-loop control or closed-loop control. A stepper motor can only move in half-jumps or full-jumps. The size of the jump is intrinsic to the motor, and can be reduced with a gearbox. If we're doing closed-loop control of a DC motor, the resolution is limited by the feedback encoder, which typically has a resolution a magnitude or two higher than a stepper motor's.
- ngokevin 12y agoYou can just buy a Pentax DSLR which has a internally-moving sensor, and then buy the Pentax GPS unit that acts as an astro-tracker. Then the sensor moves with the stars according to GPS coordinates. Also, if you're looking just for better image quality, a DSLR isn't anything special. It's just a camera with a mirror. You can get any APS-C or larger-frame sensor nowadays that aren't DSLRs.
- paulornothing 12y agoYou mean something like the mirror less offerings that Samsung and Sony have?