On 08/02, Mark Davis wrote:
> On 8/1/2018 3:45 PM, J. Lewis Muir wrote:
>> On 08/01, Mark Davis wrote:
>>> I assume that the driver SHOULD still work with the default Yes
>>> value. Using the No value is not only less efficient, but could be
>>> a real problem. If someone makes a typo when entering a new
>>> setpoint, it wouldn't matter if they realized their mistake and
>>> quickly entered the correct setpoint before the device has moved
>>> very much - It would still go all the way to the incorrect setting
>>> before starting to move to the correct position.
>>
>> Couldn't you just stop the move?
>
> Interesting question.
>
> I just tried giving it a new setpoint and then setting STOP to 1
> before it finished moving. But the same problem occurs: It stops,
> the done moving bit is till clear, and it won't take any new
> setpoints.
My main point here was just about the user scenario you described where
the user makes a mistake and then tries to quickly enter the correct
setpoint, but the motor goes all the way to the incorrect setpoint
before starting the move to the correct setpoint. I was just suggesting
that the user could quickly stop the move rather than quickly entering
a new setpoint. That works, right? The motor doesn't continue moving
to the incorrect setpoint after the user has commanded a stop, right? I
understand your bigger issue with the behavior, but just from a safety
point of view for the user scenario you described, stopping the move is
no less safe than entering the correct setpoint. If anything, stopping
is probably a little safer just because the user wouldn't have to think
about the correct setpoint and enter it; they could just stop the move.
But then you're saying that after commanding a stop, you can no longer
command a move to a new setpoint, ever? That seems broken.
Lewis
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