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| DaOld Man:
Well, in the stepper motors defense: With software you can set speed up and slow down points and stop points, you can also adjust the angle of the monitor easily through software. (No fiddling with the switches until it is just right). Now I do believe that simple is better, but to be automatic (which you got to admit is way cooler), you need to get a bit more sophisticated. And to be able to control the speed you need to run is a lot easier than figuring out the gearing before hand, plus it is a lot simpler. And also, gearing (belts, pulleys, gears, whatever) takes up precious real estate space in the cabinet, and can produce more noise. (Case in point my first setup.) Im not knocking your setup Danny, as a matter of fact I think it is fantastic, I guess Im just trying to defend the guys out there that are making "rotating a monitor" a work of art in itself. And exploring ways to do this is a great learning experience. ;) |
| DNA Dan:
For me gearing the thing seemed more complicated. I mean what gears, at what distance? How do you mount them? I'd sure love to see a pic of this. I guess it just depends on what skill you have. :afro: |
| danny_galaga:
I'm not knocking anyones project, that's for sure. For large monitors, you'd definitely want to be able to decelerate before getting to the end. Although I probably would have used some sort of dampener at the end stops instead. For me, what I've done is the simplest way possible. And it just so happens ( I didn't plan it this way) it would be the simplest system out there to 'fully' automate with software, since all it needs to be fully automated is a relay (and I guess a transistor for the relay) and a signal that is either on, or off. This has all come about because I am useless with software ;D If you look here, http://dannygalaga.com/page3.htm Scroll to 8th April and see what I've done. You can see how I've made the switches adjustable. And the gearing just happened to work out. I think the first disk I made was that one! It's very easy, without math, to get in the ballpark. It could actually stand to be a few mm larger in diameter though because as the motor has gotten older, it's getting harder to turn. I might pull it apart and regrease it. I definitely am not knocking stepper motors. I have a soft spot for them. In trade school one day, the lecturer was talking about stepper motors and he suddenly had an epiphany. He went and grabbed an old alternator with exposed diodes, stuck it in the test bench and turned it into a crude stepper by manually pulsing the fields in succession. Although I was understanding what he was saying before, all of a sudden it made perfect sense to everyone that day. If only high school were that fun and impromptu :) |
| DaOld Man:
I remember a lot of fun back in the school days. Every kid should stay in school, it really gets more fun as you progress. Danny, if you are thinking of using relays for your setup, I have a few ideas I can toss at ya. If you have a printer port on your computer, you could even use MRotate to do it, but it might take one small relay and another larger one that can handle the current on your motor. (And transistors or a solenoid driver chip to turn on the relays.) Or better yet, a chip (leave the rest up to you) that can latch and unlatch your motor relay. One signal on the printer port turns on the relay, another signal turns it off. Use Rotate Horizontal output to turn relay on and rotate vertical output to turn it off (in MRotate3). It will be fun to see what you come up with. |
| danny_galaga:
--- Quote from: DaOld Man on March 21, 2011, 07:16:23 am ---I remember a lot of fun back in the school days. Every kid should stay in school, it really gets more fun as you progress. Danny, if you are thinking of using relays for your setup, I have a few ideas I can toss at ya. If you have a printer port on your computer, you could even use MRotate to do it, but it might take one small relay and another larger one that can handle the current on your motor. (And transistors or a solenoid driver chip to turn on the relays.) Or better yet, a chip (leave the rest up to you) that can latch and unlatch your motor relay. One signal on the printer port turns on the relay, another signal turns it off. Use Rotate Horizontal output to turn relay on and rotate vertical output to turn it off (in MRotate3). It will be fun to see what you come up with. --- End quote --- The motor only draws maybe an amp at most, I just realised I could probably keep it even simpler and use a transistor only (",) |
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