On 11/29/2020 08:09 PM, Gene Heskett wrote:
But what characteristic is it that actually determines
what sort of a servo it is? As in torque vs velocity? I
intend for this to work under cutting loads. That is why
the double reduction of two worm drives in series that
this will be.
A velocity servo has a speed sensing device (like a DC
tachometer), the control sends a velocity command, the drive
is supposed to make mechanical velocity exactly proportional
to commanded velocity.
A torque amp has a current sensing device (ammeter shunt)
and the command from the control makes current proportional
to the torque command. Motor torque should be very close to
current except at the outer edges of the motor's curves.
Jon
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