Experimental Physics and
Industrial Control System

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

Replies:

Re: Delta Tau motor control problem Mark Davis

References:

Fwd: Re: Delta Tau motor control problem Mark Davis

Navigate by Date:

Prev: Re: Delta Tau motor control problem J. Lewis Muir

Next: Fw: Delta Tau motor control problem [email protected]

Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  <2018>  2019  2020  2021  2022  2023  2024 

Navigate by Thread:

Prev: Re: Delta Tau motor control problem J. Lewis Muir

Next: Re: Delta Tau motor control problem Mark Davis

Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  <2018>  2019  2020  2021  2022  2023  2024