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

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.

Flying Diode

Views: 4649

Hi All Currently, we encountered that the schottky barrier ... - Jun 07, 2011 by Jacki  

Unless you have a feeder with unusual vibration that is gene... - Jun 08, 2011 by FredC  

Hi Fred Thanks for your advice. That can cause bcoz may be... - Jun 09, 2011 by Jacki  


Jacki

#64423

Flying Diode | 7 June, 2011

Hi All Currently, we encountered that the schottky barrier diode was up side down or misalignment during SMT process.And, many parts were blown away as pick up error. What we found is its package space is a little bigger for parts to move. I seek your advice who had seen and solve this problem. or, my smt machine isn't good to pick up this diode properly. We use Yamaha SMT and 71A nozzles. Part size is 0.85x0.65x0.4mm. I attached photo of diode. Thanks in advance.

Attachments:

reply »


FredC

#64436

Flying Diode | 8 June, 2011

Unless you have a feeder with unusual vibration that is generated during the advance it seems that the issue is packaging. Try another feeder that has been tuned up and properly lubed. Most high speed turret machines move the feeders back and forth at relatively high accelerations so the tape pockets should should be designed to resist the movement of the devices being presented. If some of your diodes are already upside down before the tape is put in the machine there is no question that it is the tapes fault.

reply »


Jacki

#64443

Flying Diode | 9 June, 2011

Hi Fred Thanks for your advice. That can cause bcoz may be Machine Vibration also. I did not check whether the parts were already upside down before advance.I'll do it in next run. We found that other diodes,see atached pic, were no troble during mounting. its package design is different.

Attachments:

reply »

Equipment Auction - Eagle Comtronics: Low-Use Electronic Assembly & Machining Facility 2019 Europlacer iineo + Placement Machine Test & Inspection: Agilent | Tektronix | Mantis Machine Shop: Haas VF3 | Haas SL-20 | Mult. Lathes
SMT feeders
Now Online
60
Visitors
228
Members

Who are SMTnet visitors?

Become a member now and receive the value and benefits of membership.

thru hole soldering and selective soldering needs
Get your business noticed
One stop service for all SMT and PCB needs