https://www.youmagine.com/designs/dc...gn-information
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Explain to me how this is an improvement? I've seen servo's with feedback feeds for a while now. Is it the fact that there is more power than a normal servo? Watching the video, I see all the drawbacks of servos and DC motors in one, with few advantages aside from power. Isn't a stepper a better choice here, as steppers are supposed to lock into place? I'm not seeing the point here, please enlighten me.
No reason to not still use steppers if you prefer. The advantage is in absolute positioning, not relative so a missed step cannot ever happen. The other big advantage is speed. A well tuned PID controller can move like greased weasel droppings and stop on a pin head.
Wow! Is that ever a great find. A dirt cheap servo with 888 line encoder feedback. In theory, that could mean 3552 (888*4, quadrature) pulses per rev. That far surpasses the (actual) resolution of steppers at 200 ppr. I was surprised to see the price of the little motor at $5.98 ea., including the built in encoder. Have to wonder how durable those little puppies are, but since they're intended for toys, they might just be fine. Someone will no doubt design a proper housing to protect the encoder disk.
http://3dprintboard.com/attachment.p...tid=4500&stc=1
Motors are pretty high speed:
5V, 60mA, 1600rpm
12V, 80mA, 4300rpm
24V, 120mA, 8600rpm
I wonder if the Arduino program has any provision for ramping...
I call a farce on that price, last time I tried to buy from the germany, the strip alone in my quote worth 30+$ just for the strip and rotary plastic ....
Ruhlatec something, unless I've been completely screwing by browsing, but 5$ for that ammount of LPI is really cheap.
Alternatively, I've taken habit of scraping encoder printers and their motors. I end up accumulating encoder.
Just beware though, finding the pinout is a pain in the butt.