Electronics Forum | Tue Jun 10 11:51:15 EDT 2014 | rway
Your target ppm in on the Juki machine a take it. So it's rejecting these parts due to the inversion? Any way to disable this. A right-side down resistor is not ideal, but it will certainly work electrically. Reese
Electronics Forum | Sat Jun 07 23:37:34 EDT 2014 | demzvill
Hello all Good morning. I just want to ask with you guys about the problem that we always experienced in our production. We could not get our target ppm due. to inverted placement of chip resistor. We are using 2000 series juki mounter and cf03hp j
Electronics Forum | Tue Aug 02 11:58:44 EDT 2005 | GS
Are the pick up nozzles metal made (ironmagnetic material)? Some time magnetic residual on metal nozzles can generate pbm like that when chips terminations have nickel and when SOt or similar packages have terminal A42 alloy made. Time ago got pbm l
Electronics Forum | Mon Sep 27 04:08:25 EDT 1999 | Earl Moon
| | | I am in the process of picking a new resistor network for one of our new board. Since we are new to SMT i would like to get some opinions on networks. Currently we use one molded gullwing type network on our boards with no problems. Other than
Electronics Forum | Wed Feb 26 13:21:30 EST 2003 | gregp
Are the markings on resistors the actual value? Do AOI machines look for these markings or do they just look to see if a component is present and placed well? Can anyone attest to the solderability of upside down resistors? Can anyone argue that u
Electronics Forum | Wed Feb 26 17:05:42 EST 2003 | davef
Q1: Are the markings on resistors the actual value? A1: Generally, resistor marking indicates the value of the device, where the first two digits are the value and the third digit is the multiplier. Q2: Do AOI machines look for these markings or do
Electronics Forum | Mon Feb 10 10:24:43 EST 2003 | gregp
The Universal chipshooter (Sanyo) has automatic X-Y pick-up correction as standard. Are the upside-down resistors an issue for inspection purposes? Do you use AOI? Can you really read markings on 0402 resistors?
Electronics Forum | Wed Jan 06 12:17:09 EST 1999 | Michael Allen
I was told today that upside-down placments may not cause thermal problems (at least according to one of our suppliers). Sounds like this problem could be application-dependent (supplier, R-value, actual wattage). Does anybody have hard evidence th
Electronics Forum | Wed Sep 26 11:59:26 EDT 2001 | mparker
Electrically, the part still works, even if upside down. When upside down, you cannot see the part identifier. If you are an OEM and your QA/QC people don't freak out because they can't read the part, let it go. If you're a CM, your customer would
Electronics Forum | Fri Feb 07 17:05:57 EST 2003 | gregp
Pick up correction (as far as position) is already available on newer model chipshooters. This doesn't address upside-down fed resistors. The link I provided for Murata tells a story of increased reliability and reduced cost. As components get sma
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