Homebrew PCBs

"Andrew" <a_wake@...> writes:
> DJ, what advantages do the BLDC motors have over steppers? And what
> mechanism did you use for feedback to determine when to start and
> stop?

In this case, "they were free" :-)

But in general, BLDC motors maintain their rated torque at much higher
RPM than steppers, and are typically used with encoders so the
controller always knows where the shaft *is* (and with 10-20x the
precision of steppers too), not just where it *should be*.  The down
side is, they tend to be more expensive, larger, and harder to control
than steppers.

The CAM software knows how fast the motors can start and stop, and their
top speed, and controls them accordingly so the controllers can keep up.