>In this case, "as the story goes" is not correct. The slew rates are
controlled >by
>the computer through generation of drive pulses delivered by it to the
drive
>circuitry. The scope slews at the same rate as requested by the hand
keypad
>regardless of the voltage.

>Doc G.

Sorry but my measurement on the scope with an oscilloscope shows that in
maximum slew mode there are no pulses going to the motor drive ic's the
chips are hard on.Consequently the voltage on the motors is that of the
supply minus the drops in the output stages of the chip motor drivers.So if
the supply voltage is lower the motors will run slower.However if you select
on the keypad a lower maximum slew rate number ie from 6 down to 2 or 3 say
then pulse control is enabled at maximum to achieve this.

Brandon S. Jones

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