Electronics Forum | Fri Sep 17 17:00:39 EDT 2010 | AL
we are using convection ovens and we face the issue when changing from Pb to RoHS but also even when change top side to bottom side if the diference on the profiles needs to go from a high temp to low, we are opening the hood but we would like not to
Electronics Forum | Fri Jul 25 09:54:00 EDT 2014 | emeto
Hello all, what is your opinion on step stencils. Is it better to have the step on the squeegee side or on the bottom side of the stencil? Why you do it this way? What are the advantages and disadvantages?
Electronics Forum | Tue Jul 29 07:24:03 EDT 2014 | jandon
I think you need step on the bottom side of the stencil (undercutting) only to compensate elevations on the top side of the PCB, such as labels.
Electronics Forum | Fri Feb 09 09:19:40 EST 2018 | jmedernach
Consider offsetting the dimensions for at least one fiducial when applying them to the top and bottom side of a board. This helps to pokayoke the design by preventing an operator from accidentally loading the magazine or printer with the "wrong side
Electronics Forum | Wed Feb 12 19:06:28 EST 2020 | SMTA-Alex
I see that the connector has plastic alignment pins. Is there any reason you can squirt a drop hi-temp "Crazy" glue into each hole, after the bottom side assembly and before printing the top side?
Electronics Forum | Mon Jun 08 09:22:10 EDT 2020 | vinitverma
I guess the link you sent shows Top Side of the component. Send a picture of the bottom side - which the camera will see and I may be able to help.
Electronics Forum | Mon Mar 09 03:45:19 EDT 2009 | nagesh
I have a double sided assembly board having more no. of QFP's & IC's at both Top & bottom.Is there any concern about this??.COz. i have the profile set to be almost same for Top & Bottom.Worried whether bottom side IC's fall/ Shift during Top side re
Electronics Forum | Thu Aug 07 10:02:39 EDT 2008 | rgduval
Is this part placed on first-side processing? Is this defect being detected after second-side processing? We've had this happen before when running the second side of the board, parts being pulled, apparently, by the belt in the oven while being re
Electronics Forum | Fri Mar 19 05:08:24 EST 1999 | Vinesh Gandhi
Hey Marc, I am not sure about the kind of process you are following. Is it Gluing+paste printing on the bottom side or just gluing on the bottom side and paste printing on the top side. The relationship which I could think of between Bottom side
Electronics Forum | Wed Jun 16 15:31:47 EDT 1999 | JERRY JOHNSON
WOULD LIKE TO DO RELOW OF 2 SIDED SMT BOARDS. USUALLY THE BOTTOM SIDE HAS RESISTORS AND CAPS ONLY. WHEN THE BOTTOM OF THE BOARD HEATS UP, THE PARTS ARE FREE TO MOVE AND ONLY SURFACE TENSION WILL KEEP THE COMPONENT FROM FALLING OFF. CAN BOARDS BE RUN
