On 10/26/2020 06:48 PM, Gene Heskett wrote:
But the switching losses in the olimex board, even at only
a 1 kilohertz pwm are killers, getting it hot enough to
burn a finger in just 2 or 3 seconds. So, I need a d2a to
drive one of the 150 watt class D audio boards after
shorting the inputs hi-pass filters caps. And I have the
feeling that even as sweet as the SpinX1 is for knocking
around a vfd, that it won't be fast enough for this, so
I'll need a real d2a that I can shove fresh data thru at
servo-thread speeds. Looking for likely suspects I might
be able to drive from the 7i76D sserial extension bus.
Suggestions?
I'm guessing the thing was designed for 50 Hz PWM or
thereabouts. That might actually be OK for a spindle motor.
Clearly NOT OK for a positioning servo.
Jon
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