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Board Support for Double-Sided PCBs

Rob

#28283

Board Support for Double-Sided PCBs | 28 April, 2004

When it comes to double-sided boards, how does one support a board so that those supports don't hit any components on the side already run but yet keep the board firm and rigid? Is it more of an engineering design to layout the board in such a way that production can run it without encountering so much problems?

I have an MPM Ultraprint 2000 and I come across a problem when I have to run the second side. To avoid hitting components I put no support so when the squeegee makes a pass it leaves streaks on the stencil in those areas that have no supports.

Any ideas??? Thanks, Rob

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#28284

Board Support for Double-Sided PCBs | 28 April, 2004

Hello There is several ways of placeing board supports. It's easier to explain this over the phone. If you would like to call us we would be willing to go over it. 740-344-4260

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#28293

Board Support for Double-Sided PCBs | 28 April, 2004

We usually make a template offline to put with the assembly file. When it is time to run, place the pin support template in the machine, place your pins and your ready to go. Probably about a 15 sec setup. We looked into the ready-e-set pin support system, which is cheap and very nice but you couldnt beat our 15 sec setup. If you have to room for pins I would suggest the ready-e-set pin support system, its cheap, and efficient and the pins form to the bottom of the pcb without damaging the components.

Paul

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Dave G

#28298

Board Support for Double-Sided PCBs | 28 April, 2004

Rob, Don't know if you bought an "H" tower with your UP or not.

You did you can have a dedicated support plate made from Aluminum that has pockets machined out to match components on the bottom of the board. (Most of the workholder guys can set you up with an "H" tower as well) You get excellent support for printing fine pitch qfp's/bga's etc. Downside is the $$. They are only good for that specific pcb and will need to be removed if you change over often.

I use pins for my "low tech" boards and reserve the support plates for the difficult to print boards. You can buy these equipped with board snuggers as well. To setup the pins: We make clear plexiglass panels that are the same outline as the pcb and place stick on red dots where the pins need to be. We store the clear plates with the stencil for each job so they won't get lost.

Hope this helps, Dave G

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Rob

#28299

Board Support for Double-Sided PCBs | 28 April, 2004

Thanks to all. The way I've been doing it has been crude and very similar to your method. I make an imprint of the bottom side and cut out areas where components sit and this imprint transfers over to a cardboard. When it comes time to run the second side, I place the cardboard in the worknest and move support pins around to "open" areas. I never thought of plexiglass, hmmm... That's a very good idea and I'm going to try that route out...

Thanks again, Rob

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Chris Lampron

#28346

Board Support for Double-Sided PCBs | 30 April, 2004

We are using these and are very happy with the results.

http://www.production-solutions.com/Inline.htm

Good Luck

Chris

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#28347

Board Support for Double-Sided PCBs | 30 April, 2004

MPM has a new board support system called GelFlex. It can be used on UltraPrint 2000 machines as well as AP series, UP1500 and AccuFlex models. For more info, go to http://www.speedlinetech.com/mpm/gel-flex.aspx also, contact Chris Wild at Speedline Tech-MPM 508-541-4949 cwild@speedlinetech.com

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David Leban

#28389

Board Support for Double-Sided PCBs | 4 May, 2004

Go to http://www.dfltool.com for my new product

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