|
Sponsor
|
|
High-Reliability for Low-Temp Processes
Durafuse® LT low-temp, high-rel solder paste is bismuth-free, reduces warpage in large BGAs, enhances thermal cycling, drop shock reliability and reduces energy use up to 15%.
Indium Corporation
|
|
|
Sponsor
|
|
Unlock the Potential of Salvaged Devices
Component harvesting is a reliable method of electronic component reclamation, reducing e-waste and ensuring economic reuse for automated assembly.
BEST Inc.
|
|
| Ask the Experts |
|
QUESTIONS
MEMBERS
|
August 15, 2012 - Updated
August 8, 2012 - Originally Posted
Matrix for SMT Assembly Labor Costs
We operate a small EMS company. My boss has asked me to provide a cost matrix so we can quickly quote the labor/machine time component for SMT board assembly. We have multiple pick and place systems, but someone suggested we focus on stencil printing as the key metric. What do you suggest?
S.S.
|
| Expert Panel Responses |
It has been a long time since I've done any of this,but I would suggest you consider the element which takes the longest time toaccomplish. Screen printing is not going to be your bottleneck in a processflow operation as this operation will wait while the components are beingplaced before providing another board. Consider the total number of componentsbeing placed, the machine cycle time, and the physical cycle time which will beslower due to travel time between component locations and pick up time from theequipment pick up heads. I’m pretty sure component placement will be yourbottleneck, so your assembly line should be balanced on the number ofcomponents it can place and still maintain a pace of assembly.
Leo Lambert
Vice President, Technical Director, EPTAC Corporation
At EPTAC Corporation, Mr. Lambert oversees content of course offerings, IPC Certification programs and provides customers with expert consultation in electronics manufacturing, including RoHS/WEEE and lead free issues. Leo is also the IPC General Chairman for the Assembly/Joining Process Committee.
|
|
|
Free Newsletter Subscription
Circuitnet is built for professionals who bear the responsibility of looking ahead, imagining the future, and preparing for it.
Insert Your Email Address
|
|
Sponsor
|
|
EZ-FLO High Precision Dispense Tips
Each needle is machined from solid stainless steel as opposed to rolled tubing. The resulting smoother internal profile enhances material flow and consistency. Learn more.
DL Technology
|
|
|
