Re: Stg/Emc Jogging problem

["Markus Meyer" <meyer-at-mesw.de>]

Ray,

> What happens in any PC when you press a key is that a press code is 
> sent.  Then when you release the key a release code is sent.  
> Overlapping key presses without the release make a mess of what the 
> keyboard driver thinks is happening.
> 
> When you type text this is not so much of a problem but when 
> you try to 
> control a machine with the text input system it doesn't 
> cancel out both 
> when one is released.  There is not good way to change this with the 
> keyboard drivers.

I don't agree with you on that. I've done alot of game programming (just
imagine a jump&run, left/right is move, up is jump, down is duck and
space is fire, all potentially pressed at the same time), and this
doesn't happen in any game I know. I agree, that there are combinations
of keys, where some keys don't get recognized or get released too early,
but I have _never_ seen any release key code not sent properly.

My guess is, that some events are recorded in the wrong order (by Linux,
or by EMC), or that events are skipped.

It may be the case that using another keyboard helps (they all usually
use some slightly different row/column encoding), but this is unlikely.


Best regards


Markus


> 
> Ray
> 
> 
> > Hi Jim,
> > 
> > Same problem on my system using S & D Gecko servo amps.
> > Work around is don't hit 2 keys at the same time :)
> > I have had that problem for a long time now, spanning many
> > versions of EMC. 
> > 
> > Bill
> >   ----- Original Message ----- 
> >   From: jim scott 
> >   To: Multiple recipients of list 
> >   Sent: Tuesday, March 26, 2002 5:40 PM
> >   Subject: Stg/Emc Jogging problem
> > 
> > 
> >   Hi,
> >   While making adjustments to to P,I &D  I noticed that if two axis 
> are
> > jogged simultaneously , one axis will latch on and will 
> only stop if 
> its
> > jog key is pressed again.I am using EMC in conjunction with a 
> ServoToGo
> > 2 ,8 axis card.Any help would be appreciated,
> >   Jim.
> > 
> 
> 
> 
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