Electronics Forum | Wed Mar 14 12:06:15 EDT 2007 | Oswaldo Rey
There is an approximate 1W dissipation and has a 2 sq in area below part on solder side as a heat sink, vias are to physically conect this solder side area to power pad, so its necessary to use an adequate amount of paste. I really don�t think it has
Electronics Forum | Tue Mar 13 17:29:18 EDT 2007 | Oswaldo Rey
I placed a Maxim MAX16810 38 pin TQFN with a power pad ground on the bottom of the chip on a prototype board FR4 doble sided. Vias of 0.6 mm where placed underneath part, 6 vias in total. Solder was placed with an air operated syringe, land pattern w
Electronics Forum | Fri Oct 16 14:45:58 EDT 2009 | cyber_wolf
Many pick and place platforms rely on nozzle spring pressure to determine how hard a part is getting pushed into the paste.
Electronics Forum | Tue Jan 14 11:39:51 EST 2020 | avillaro2020
Thanks Robl. I’ve contacted samtec followed their advice but ended up empty handed. Originally my stencil thickness is 6 mils, samtec stressed the need for the paste and charge to have good contact but this is challenged by the inherent charge non-co
Electronics Forum | Tue Jan 14 19:41:32 EST 2020 | avillaro2020
Hi Evtimov, Thanks for your response. Yes, the vapour phase is suppose to handle big and heavy boards, at least thats the intention. Well our thin board is like around 3mm which is not really thin. In our application the thicker the boards means more
Electronics Forum | Thu Jul 20 12:16:26 EDT 2000 | Dave F
Bob: On "paste push-out" (when inserting a component lead into a through hole pushes the paste out of the hole) in pin & paste assembly: * What factors affect paste push-out? * What techniques reduce this effect, given a board design and component
Electronics Forum | Tue Jun 01 15:42:33 EDT 2004 | James
We use them on our DEK printers. They have worked out very well. The only thing we had to do was make a push down bar so we could push all the pins down and lock them. This makes setting up the blocks much easier; board is fixtured, pins released
Electronics Forum | Thu May 18 17:34:06 EDT 2006 | Frank
The Juki tape feeders are mechanically actuated. There is a knock pin on the bottom of the feeder bank that will push up to advance the feeder.
Electronics Forum | Thu Dec 03 14:40:27 EST 2015 | proceng1
When we had a line that ended at an older reflow oven without SMEMA controls, I ran a momentary switch to the two pins in the connector. I push the button and the conveyor pushed the board onto the edge-hold of the oven. As a joke I labelled it "LA
Electronics Forum | Sun Mar 12 13:09:33 EST 2000 | Jeff Wilson
Jeff, The problem you are describing MAY be related to the push up pin setting on your component feeder units. Please verify that the push up pin height is set correctly for the feeder units, and the nozzle pick-up and placement heights are to the c
