Re: Life is just a dream

[Ray Henry <rehenry-at-up.net>]

Joe

Once again you are being bitten by the polarity of a couple of the variables 
in your ini.  bridgeportio uses two pins on the aux parport to sense and set 
estop.  The sense one must be correct for your port.  The set one doesn't 
really matter.  You will encounter an error message when you try to come out 
of estop because bridgeportio expects the sense pin to change when the set 
pin says that the EMC has come out of estop.  Just okay the message and you 
should be able to run.  I've snipped out the relevant lines below.

---snipped ini---
; digital in bits

ESTOP_SENSE_INDEX         =     1
<s>
; digital in polarity, 0 is inverted, 1 is normal
; controller compares with polarity, equal means on, not equal means off

ESTOP_SENSE_POLARITY      =     0
<s>
; digital out bits
<s>
ESTOP_WRITE_INDEX         =     10
<s>
; digital out polarity, 0 is inverted, 1 is normal
; controller writes the polarity to turn on, opposite of polarity to turn
 off
<s>
ESTOP_WRITE_POLARITY      =     1
---end---

You learned a few posts back that the index refers to the pin and that pin 
nuumber is assignable through the ini.  What isn't assignable this way is the 
logic that relates to the aux signals.  This logic is hard coded in the I/O 
software.  

I don't know what you are doing with the z but in most situations you will 
want a little bit of dwell between the z down command and the start of 
motion.  This can be accomodated by putting a dwell (g4 pnn) on the line 
after the coolant on command.  The problem is that you have to remember to 
put it in your code each time  

The same thing can also be accomplished without any need to change the g-code 
by using the spindle forward and stop because there is already a settable 
dwell there on both ends for spindle brake off and on.  These times are 
settable in the ini using the two variables below.

; wait times in seconds for spindle brake, release
SPINDLE_OFF_WAIT          =     1.0
SPINDLE_ON_WAIT           =     1.5

Hope this helps

Ray


On Friday 10 May 2002 02:24, you wrote:
> Dean,
>    My son Jason may be close to solving the problem. We are trying to use
> mist on and mist off to control the up and down air cylinder of the Z axis.
> We had to switch from minimill to bridgeport. Now we are experiencing
> problems with coming out of e-stop. None of the conventional cures seem to
> work. We are using a BDI install with a stg8 board. I believe that most of
> my problems in the past have been related to the linkage of the emc program
> and the stg board.
>    I'm actually looking forward to the G-code. At least there should be a
> certain amount of predictability.
>                                                   Joe
>
> From: "Dean L. Hedin" <dlh2001-at-comcast.net>
>
> >Reply-To: emc-at-nist.gov
> >To: Multiple recipients of list <emc-at-nist.gov>
> >Subject: Re: Life is just a dream
> >Date: Thu, 9 May 2002 01:44:02 -0400 (EDT)
> >
> >
> >I agree with you to some degree.  But I have to admit, I am impressed
> >with how far I've come since October of last year.
> >
> >I am a programmer by trade.  But you know what?  Setting up/configuing
> >EMC was not the hard part.  The hard parts were aspects of the machine
> >itself,
> >and learning the subtleties of g-code and optimal tool paths.
> >
> >With the machine (3 axis router) it was the harnessing & hook up of the
> >controller, proper stepper motor sizing,  limit switches etc...
> >
> >With the g-code it was more of an experience thing.  Learning not to waste
> >motion.   Using a larger bit whenever possible, etc..
> >
> >Where are you at right now Joe?  Maybe we can help you along.
> >
> >On Tuesday 07 May 2002 05:08 pm, joe bury wrote:
> > > List,
> > >    Some days I wish I never heard of the emc program. It has been one
> > > of the most frustrating events of my life. I know there's a learning
> > > curve
> >
> >to
> >
> > > most things. But it doesn't apply here. Even when you do the research
> >
> >and
> >
> > > put in the time there so many quirks that you can't tell if your coming
> >
> >or
> >
> > > going. It keeps you holding on with success  always just around the
> >
> >corner.
> >
> > > When nist said they want to expand the use of cnc and to open up the
> >
> >market
> >
> > > this is a laugh. Because the program is not user friendly. You need to
> >
> >be a
> >
> > > computer programmer to wade thru the code. It tickles me when a newbie
> > > comes on board, if only they knew what lies ahead. This said and done I
> > > guess I'll start pounding my head against the wall again tomorrow,
> >
> >because
> >
> > > I'm not a quitter.
> > >                                                    Joe Bury
> > >
> > > _________________________________________________________________
> > > Get your FREE download of MSN Explorer at
> >
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