Kent A. Reed wrote:
> Gentle persons:
>
> I know the topic of pick-and-place machinery has come up from time to 
> time on this list.
>
> I just came across a mention of the OpenPNP project on HackADay.com.
>
> Since I don't get a hit on 'openpnp' in my emc-users mail archive, I 
> thought I'd pass along what might be interesting new information:
>
> http://code.google.com/p/openpnp/
>
>   
Interesting stuff!  I have a 15-year old Philips CSM84, about a $100 K 
when new.
3 heads, optional vision (which I don't have) a million solenoid valves 
and sensors,
and 3 servo motors.  I am sort of fretting over what to do when the 
control computer
(an 80286, and not a conventional IBM PC form factor, although logically not
that far from a PC XT) craps out.  I could retrofit it with EMC2, but 
the thing has
a HUGE amount of checking and recovery features built in, such as if it 
doesn't
get the right vacuum when picking up a part it cycles the head and 
alignment jaws
over the dump bucket to see if it can straighten the part, if so it 
places it, otherwise
it tried to jettison tha part over the bucket and goes to re-fetch the 
part.  If all the moves
(go to feeder, pick up, go to board, place) were scripted in G-code, EMC 
couldn't
do this recovery action.
  It also picks up fiducial marks with a sensor and realigns the 
coordinates in XYC
based on that.  Of course, if I did a retrofit, I could add a vision 
camera to it.


Jon

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