Electronics Forum: component hold down (Page 1 of 157)

Jumper wire hold down

Electronics Forum | Wed Dec 10 11:54:15 EST 1997 | Kyle Dopp

I can remember seeing jumper wire that had special insulation that you melt to the board to hold it down instead of gluing. Does anyone use this product and can tell me where to get it.

Melfs drops down from nozzle

Electronics Forum | Mon Sep 11 08:22:56 EDT 2023 | richardcargill

A lot of MELF components have solder ends that stand slightly proud of the main body where your vacuum would lift them, so vacuum leaks are most likely the culprit. Upping the Vacuum to the nozzle may help, but better thing would be to modify the noz

Laying down and holding large components

Electronics Forum | Thu May 22 13:31:52 EDT 2003 | Dave

If you have a component with a height issue and want to lay is down (capacitor in this case), what are the best methods to consider? RTV, epoxy or something else?

Laying down and holding large components

Electronics Forum | Thu May 22 18:47:12 EDT 2003 | russ

I would assume we are talking about a radial leaded electrolytic cap? We use Electronic grade RTV (Dow corning 3145). It sticks good and can be removed if necessary. It is also pliable so you don't have to worry about CTE or other stresses that may

Laying down and holding large components

Electronics Forum | Thu May 22 14:16:40 EDT 2003 | MikeF

We need more information to give you a good answer. Is this a leaded part (axial or radial) or smt? How big is the part, how much weight per lead? What is the end use environment, will it see any vibration? or temperature extremes? Some general com

chip placed upside down

Electronics Forum | Tue Jun 10 15:47:18 EDT 2014 | hegemon

Possibly the components have been re-taped in that particular reel, with only electrical function in mind? Hard to see a nozzle causing a flip, and I am thinking if your feeders are vibrating bad enough to flip the components in the tape, that you

chip placed upside down

Electronics Forum | Wed Jun 11 11:40:12 EDT 2014 | rgduval

As has been mentioned, it's likely that the component is moving in the tape, and flipping over. It is not likely that the pick/place operation is causing this. What I haven't seen mentioned is that there is an acceptability criteria in IPC for inve

Toe down configuration

Electronics Forum | Wed Jul 06 09:27:49 EDT 2011 | rdouglass

Has anyone come across any good visuals for the solderability requirements for component leads with toe-down configuration? IPC-A-610 does not have any visual aids for this category and our inspectors are having a difficult time assessing based sole

SMT Component placed upside down

Electronics Forum | Mon Aug 01 17:54:02 EDT 2005 | Stefan

If you are using vib. feeders than the component may be flipped length wise by the following components. Components should be landing with the leads on the right side but upside down. If you are using tape feeders the component may be flipped sideway

SMT Component placed upside down

Electronics Forum | Tue Aug 02 11:17:27 EDT 2005 | Stefan

Tape feeders usually have a fixed pick position regardless of the package size. Is the component body off center in the tape pocket? I hope you can enter an offset in the feeder set up file. Also, perforation holes can deform, if the reel is too hea

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