Electronics Forum | Wed Nov 16 10:56:43 EST 2005 | aj
The latest software packages and stopwatch will do the job but if your manager is anything like mine he wants to know straight away from the BOM. If you split the bom down between placement machines i.e. caps and resistors etc on chipshooter and ICs
Electronics Forum | Mon Jun 07 14:13:53 EDT 2004 | ricardof
Gabriele, yes you're right, but my question is more focused to restrictions as for the Operators, and then the performance in Screen Printer and Oven. The board has 400 high speed parts and 20 parts for Odd Shape machine (QFPs and 2 BGAs), Board is n
Electronics Forum | Thu Aug 26 13:20:56 EDT 2004 | pjc
Machine design plays a major factor in actual placement rate vs. the published tact time max speed. For example, random access horizontal turret head machines can vary greatly depending on nr. of different components and size ranges, while the dual g
Electronics Forum | Wed Feb 19 12:47:15 EST 2020 | emeto
Grandpa, You got it - Identifying the bottleneck operation is the key. The secret is to design a tool can predict accurately where this bottleneck is. In your formula you can use machine process time, PCB transportation time, part trim time, part in
Electronics Forum | Wed Mar 03 19:30:37 EST 2010 | dcell_1t
Yes, it is basically: Rate = Time interval/Cycle time I put time interval since you can measure however you want (pc per hour, per day, per quarter hour... it is relative) the most used is Pc/Hour, so the time interval is 1 hour (3600 sec). Lets sa
Electronics Forum | Mon Sep 25 14:57:53 EDT 2006 | jdengler
John, Your calculation looks fine. If that's all you were looking for your done. If you really want to produce more boards per day we would need more info. Size of board, can it be panelized or larger panel. Your line configuration and what mac
Electronics Forum | Fri Dec 08 08:25:03 EST 2006 | jhaviland
Depending on the system you can program in a loop where if the board fails a contact to cycle the vacuum once or twice. it wears on the pins a little faster since you cycle 2 times (maybe more) per board but it could help increase the FPY. I know Gen
Electronics Forum | Tue Feb 20 15:30:23 EST 2001 | kerryn
We have a high-mix, low-volume type shop and clean over 50 stencils per day. The wash and rinse cycles in our aqueous stencil cleaner is ok, but the drying time takes too long (15 - 16 minutes per stencil). You indicate that hot air can damage a
Electronics Forum | Thu Feb 03 21:17:07 EST 2000 | Dave F
AF: Unfortunately, there is no "acceptable number of cycles" either in air-to-air and one liquid-liquid thermocycling, nor interconnect stress testing. There can be a "minimum threshold" that would assure no failures as the result of the assembly p
Electronics Forum | Mon Oct 01 15:18:01 EDT 2018 | SMTA-Shafiq
Hello All, I'm looking at performing a cost analysis to calculate cost per placement at SMT. I've read articles and many suggest simplifying it to labour cost (hourly rate x # of operators) / # of placements per hour. Other angle to this is evalua
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