Electronics Forum | Mon Jun 03 13:26:32 EDT 2019 | az2019
Hi, I have a general question about the relationship of PCB thickness and BLR testing result. For example, I have QFN6x6 parts mounted on board in 1.2mm, 1.6mm, and 2.4mm thickness. All boards have 6 layers of Cu. Studies show thicker board gives les
Electronics Forum | Wed Jun 05 15:15:37 EDT 2019 | cristian_amlima
Hi Guys.. greetings! I hope someone could help me. Does anyone knows how to configure a gripper nozzle to juki 700 series? (more specifically FS730). With this nozzle the machine should blow to inflate the nozzle and I don't know how to change from
Electronics Forum | Thu Jun 06 17:49:35 EDT 2019 | etmpalletguy
What is the material and what impact will that have in your water wash system... Think Filtration... Think Thousands of dollars for new filters every month... Then make a decision after two other people have made comments. Talk to your maintenance gr
Electronics Forum | Mon Jun 10 08:51:01 EDT 2019 | don_julio
Thank you Clare. After doing some more research, I found they are known in the industry as "Carriers". I did look into that durostone material. They prices are beyond reasonable. My trek now is seeking a material to make planks out of to lay the b
Electronics Forum | Mon Jun 10 09:12:18 EDT 2019 | pcbconnectchina
Hello! Don, Yes, if the carrier is steel/stainless, it would be very hot when it comes out from oven. I heard that durostone (synthetic stone) carrier can meet your requirement, it can stand high temperature with low thermal transmission. So when it
Electronics Forum | Mon Jun 10 10:12:42 EDT 2019 | assuredtech
What is the year, make and model of your oven? Are you running it with Upstream and Downstream (pre-reflow, post-reflow) conveyors? Is the qty of the product low, medium or high? What is the max process width of the oven? what is the max board with o
Electronics Forum | Mon Jun 10 10:23:47 EDT 2019 | don_julio
We started getting better reflow after rotating the pcb to locate the greater mass closer to the center of the oven. However we still leave space between panels on the conveyor to achieve a better reflow. This costs us production time. I'm simply lo
Electronics Forum | Tue Jun 11 11:22:19 EDT 2019 | sumote
If the board is just not reaching the temps you need, you could place them in an oven to "preheat" them. When I was building a rather thick board with a copper core I had to do this. Since we were only doing small runs it was feasible, I don't know y
Electronics Forum | Tue Jun 11 12:15:27 EDT 2019 | sumote
Consider an adjustable (or fixed) process carrier then. It could offset the board so that your component is better centered. I have used Pentagon EMS for such carriers in the past. They are pricey, but last forever. We were a contract house, so the c
Electronics Forum | Thu Jun 13 12:50:00 EDT 2019 | don_julio
> A couple of caveats; The FR4 will degrade with > successive reflows and will eventually need to be > replaced. Not a big deal for low volume, but > something to be aware of. The bigger concern is > that a sheet of .125" lar
