Re: LM628

I have used this chipset in the past also (at least the 629 version). I
never knew you could update the trajectory at 1khz though. As far as
multi axis chipsets go, a real nice one is the PMD chip. Their sales
guy bugs me every 6 months or so. Lately he has been telling me they
have a 4 axis chipset with feedforward velocity and accel. It goes for
about $150.
But given how fast and cheap the 16 and 32 bit microcontrollers are
getting now-a-days, I have come to believe closing the loop in firmware
on a processor is the way to go for a ground up system.

Mike