Talk:Motor FAQ

The section:

Stepper motors vs Servo Motors vs DC Gear Motors

Has been revised to be more specific, however I don't believe this has made it more accurate. Hobby servo's are a type of servo, but despite their popularity, in the context of industrial robotics are by no means the only game in town. If hobby servo's need to be mentioned specifically, it should be in addition to their more application-suitable brother: the continuous rotation DC servo motor. Not in it's place. --JohnnyCooper

In the section:

Stepper drivers vs Stepper Controllers

It is claimed: "a very small stepper may be driven directly from the controller", wouldn't that apply solely to unidirectional stepper motors?, since a bi-directional requires a phase change.

... with a "H-bridge"-setup and 4 transistors per coil (or 8 for a bipolar motor) you can switch the coils accordingly between Vdd and GND in either direction.

But unipolar requires only one transistor per coil, so is much easier to build and control ...

--VDX

printable motors

It occured to me that a metal that shifted between liquid n crystal forms at near human body temperature mold could build reusable laminate mechanical parts at mild temperatures.

You just have some Ga liquid along with magnetic fibers, these make a kind of laminate felt at a magnetic field (the EM is kind of a combo of strand orienting with mold clamping) yet permits fluid flow or raster printing (possibly vector printing) absent an EM field

Ag or Au coated Co or supermagnet "filings" create the orientable strands when Amorphously blended with the Ga makes a squishy metal paste Oriented with an EM field they cease being squishy. This is then printed as a kind of 3d metal cardboard

As a result of the amalgam blend the metal laminate is firm at temps below 120F above that at warm water temperature they turn back into squishy metal liquid felt

One of the points of metal is that it can have structural surface channels that with a thick 2 mm electroplating would give stronger parts than many plastics, it also conducts electricity permitting printable motors.

I read that there is a goal to make reprap produce all of its own parts, This is kind of a universal shapeable goop that makes structural as well as electrical parts. Very awesome of course would be to print induction coils so that the printed parts could also power up from EM possibly from another reprap creation