Electronics Forum: spec (Page 61 of 186)

smt costings

Electronics Forum | Mon Mar 30 10:43:31 EDT 2015 | dazdoc1977

Cheers Rob, I thought that I wasn't far from the true answer....I figured that if we were to use a "first piece assembly " quote to get a first off through smt production, This would include start to finish process....e.g Programming to first board

Air Volume / Quality requirements for Yamaha YS100 and YVL88 Machines?

Electronics Forum | Sat Nov 05 20:18:13 EDT 2016 | sarason

I checked the spec sheet and it gives pressure and no volume. The volume on one of my older Yamaha's was about 2.7 CFM. That corresponds roughly to the volume of a small 2HP compressor at your local hardware store. You can place on of these in a smal

Re: Baking PCB's before Assembly

Electronics Forum | Mon Feb 28 17:16:38 EST 2000 | Stu Leech

We just got a lesson on the effectiveness of heat sealed metalized vapor barrier bags. A customer sent us two bags of 100% saturated PBG components by air freight. This was for a demoisturizing test. When we found the devices 80% dry when they arrive

BGA coplanarity

Electronics Forum | Wed Dec 27 17:13:28 EST 2000 | John K.

As part of an Intel erratum, they changed their BGA coplanarity spec from .006" to .008". The package is 23 X 23 partial array, .050"(1.27) pitch, 1.220"(31) square. We apply paste onto BGA pads with a 6-mil stencil. From a process perspective, sh

Re: BGA Inspection Criteria

Electronics Forum | Fri Dec 08 10:21:59 EST 2000 | Jim M

I just received the IPC Fall/Winter catalog from IPC for year 2000.IPC-7095 is listed as released in August 2000. There is a member price as well as non-member price.These spec's are available at www.ipc.org or call them at 847-790-5362. Have fun J

Re: Stencil Basics

Electronics Forum | Mon Oct 02 11:20:44 EDT 2000 | aaronho

It's not really you need a book. You can ask your stencil supplier for what to... The supplier should be an expert in stencil making. Basically pitches and apertures should be made to the spec in CAD data of PCB. You can ask to make to 90% size of pa

Re: PCB Material

Electronics Forum | Thu Sep 14 09:53:09 EDT 2000 | John Thorup

Cheap and beige = CEM1 Dave has good advice. Go to a fab that you use and ask them. My concern is that you are not getting enough documentation to do your job correctly. If your customer expects you to duplicate a sample they had better spec what th

Re: Capacitor Supplier

Electronics Forum | Fri Aug 04 16:54:06 EDT 2000 | John Thorup

This is not that unusual. Most manufacturers have a number of optional lead configurations available, including a standoff kink. It is sometimes difficult with low quantities or with a lazy distributor. Get a complete spec catalog for the componen

Smema machine interface

Electronics Forum | Tue Jul 11 03:32:16 EDT 2000 | Charles Stringer

Can anybody advise where I can get the full SMEMA interface specification. I need to move about an old line and interface to Siemens Siplace which I understand is not true Smema - I have a spec for the Siplace interface - I now just need one for Smem

Re: intrusive reflow with OA paste

Electronics Forum | Wed May 24 11:21:32 EDT 2000 | Travis Slaughter

Its my understanding that so long as the paste is not exposed to air it is not going to be active, someone else might be more sure about this than I am. Be ready for lots of half soldered leads using this process. Its quick and easy but will not b


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