Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


LED rejection driving me nuts

Views: 2145

#68667

LED rejection driving me nuts | 11 April, 2013

Hi All, sorry to bug you, the attached picture of a LED is driving me nuts,

reply »

#68671

LED rejection driving me nuts | 11 April, 2013

It might help to investigate the error code provided for the rejected parts. It could help point your troubleshooting methods in the right direction. (Example, if it's failing for vision errors, you may need to make adjustments to your vision file dimensions or tolerances. If it's failing for vacuum errors, you may look towards nozzle and/or feeder issues).

Hope this helps!

reply »

#68672

LED rejection driving me nuts | 11 April, 2013

I don't know Juki machines, but I assume it is using vision. On these components I have sometimes called the leads the body and the body the leads. I'll make a picture if this sounds like it will help.

reply »

#68674

LED rejection driving me nuts | 11 April, 2013

If it's using the laser alignment try changing the part type to "SOT" instead of chip, and then enter the dimensions for only the body of the component. The "Chip" setting will measure the part half way down the body, the "SOT" setting will measure the dimensions at the very top of the part so you don't accidentally measure the leads as well.

-Phil

reply »

#68675

LED rejection driving me nuts | 11 April, 2013

Thank you for that Phil, we have more LED coming.

reply »

#68678

LED rejection driving me nuts | 12 April, 2013

No problem. I attached a little visual aid that I use to remember the different laser algorithms that the machine uses.

Attachments:

reply »

#68684

LED rejection driving me nuts | 15 April, 2013

The laser height can be changed to any level you want regardless of the algorithm you select.

reply »

Fluid Dispense Pump Integration

PCB Rework / Repair Services