Electronics Forum: sec (Page 2 of 59)

SMT Production Performance Metrics

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

Re: CALCULATION EQUATION FOR 1 CHIP SOLDERING COST IN SMT PROCESS.

Electronics Forum | Mon Jan 17 10:40:11 EST 2000 | Dave F

Cost = Labor + Production Materials + Overhead Cost = Labor * Overhead Multiplier Cost = (Time For Task*Labor Rate*Benefits) * Overhead Multiplier Cost = ((6sec/3600sec/hr)*$10/hr*1.3) * 2 Cost = $0.04

SECS/GEM

Electronics Forum | Mon Jun 15 20:30:39 EDT 1998 | Nancy J Dawdy

Would anybody like to share experiences with adding and using the SECS/GEM interface on a multi-vendor line(DEK,FUJI,PANASONIC, UNIVERSAL,BTU)???

Increase/decrease of the SMT reflow preheat

Electronics Forum | Tue Dec 11 02:44:26 EST 2001 | ianchan

SMT Experts, Hi, I have a pondering issue, which is : Our current specified Reflow preheat timing is a necessary 100~140sec for the ranges of 100~170Deg-C....obtained timing is 77sec... out of curiousity, if we further fine tune the obtained reflo

0402 tombstoning

Electronics Forum | Thu Apr 11 16:37:16 EDT 2002 | pteerink

Profile would be the first place I look. Check your rise and fall rates for temp. Should be no more than 2 deg/sec for rise and 4-6 deg/sec for cooling. Phil

Profile for Glue

Electronics Forum | Sun Apr 28 18:16:00 EDT 2002 | Dreamsniper

Hi Hany_Khoga, We're using that Glue and here is the profile we are using: 150'C @ 90 secs. 120'C @ 120 secs u can choose between the two, they r both okay and produce good results. regards and enjoy ur day! Dreamy

SMT LED functional failure

Electronics Forum | Wed Apr 16 20:22:13 EDT 2003 | praveen

Hi, I have taken the profile.The peak temp. at the lead terminal is 219 degc, duration above MP 54 sec and duration 125 deg C-160 deg C is 60 sec.

Embedded Capacitance

Electronics Forum | Tue Mar 31 22:10:43 EDT 2009 | davef

5min) PASS IST Testing (500 cycles) PASS Core Level Hi-Pot Testing PASS (100V/sec; 500Vmax) Finished Circuit Level Hi-Pot PASS (100V/sec; 500Vmax)

Flaky Capacitor

Electronics Forum | Thu Jun 05 14:20:55 EDT 2014 | isd_jwendell

230C for max 30 sec.". Isn't 225C close enough to 230C, so that you are effectively exceeding mfg spec by 60 sec.?

Looking for data on hand placed production component?

Electronics Forum | Wed Mar 06 12:14:34 EST 2002 | caldon

We would benchmark our times with the most experienced operator and them boost the time by 1/3. Example: If it takes Mary 3sec to insert the component, 3 secs to clinch and cut the leads (it is not advised to cut the leads after soldering), and 8 sec


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