Problems imaging wide SO's

[Mike]

I'm having problems imaging SO14-Wide packages, due to the part not fitting in to the camera field-of view, and the software not trying to do the multi-section imaging it does for QFPs.
Regardless of specified package size it doesn't try to do the multi- segment imaging that it does with QFP packages - I can't figure out what parameter in the CDF controls whether it does the multi-image thing.

If I start with a CDF for a QFP package, it does do the multi-imaging, but still doesn't look far enough out to see the lead ends.

Is there a 'hidden' CDF parameter somewhere to determine the type of imaging - AFAIUI the 'shape' info isn't used for imaging
Is theer a setting somewhere to determine the part size at which it does multi-segment imaging?

Anyone figured this out?

[phonoplug]

Mike - try adjusting I think it is 'pick tolerance' on one of the CDF pages. The default as I recall is usually 50, so if you change it to say 100 it will add that tolerance to where if thinks the component might be on the nozzle which should result in it then step imaging it to be sure its visioned all of it including the wider position tolerance.

[davidc]

Nope thats not right.....     I used to run Versatronics so i reckon that there isnt much that i dont know about these machines. I used to support as many people as i could but due to our new www.vivo-smt.com venture there isnt so much time for that and i have shut down VSMT. However i am providing reduced level of support to those who need it.  I know that getting stuff for free is great but if its wrong it can be more costly. So if any one wants a training course or a bunch of people want to club together for it then im happy to work out a decent deal. If you then want to post what you learn on here feel free.

And the answer is Automatic.

[Gopher]

After 8 years using this machine every day, I suspect, that the part in question likes moving around, possibly because you are picking from a tube using the VSMT engineer suggested fudge of cutting the top off the bottom of the tube rather than machining a new plate for the Vib feeder. The camera then looks at the part sees something close enough as it seeing the end of the elgs on one side and the sloping bit the other and promptly places it offset.
davidc correctly points out it should be on automatic, but I agree the machine is being bloody minded and should be moving this part around like a QFP, then this wouldn't be a problem.
If my guess is right, try putting a light tilt on the tube so the SOIC tends to vibrate to one edge.

[Mike]

The less-than obvious issue is that Automatic has three possible outcomes depending on size :  OTF, Fixed or Fixed+jiggle, and the lack of the third option in the menu implies that it should do it automatically.
Last time I had this it was with narrow SO16s, but a pre-rotate was just enough to fix it.
I've got into the habit of using Force Fixed as the first step when I hit imaging issues, and didn't realise this was what was stopping it doing the jiggly thing! Works fine now.