Hi Bill,
"Standard" is a big word and I will replace it by "common". The most common
frame size seems to be 29x29" OD (26x26"ID). The next most common frame size
is 23x23" OD (20x20"ID).
Then there are all kinds of other sizes that are needed because some
printers accept only specific frame sizes. Yes, it is possible to get any
frame size, after all, commonly they are welded from extruded aluminum
material and you can cut that to any size. On the other hand, if you insist
on cast frames the choices are more limited. Most vendors are not eager to
order a new mold to get you "any" size frame.
One thing to consider, if you go for "common" frame sizes, your stencil
vendor is going to be happier because he is not having to stock one more
special frame size that only you are using and exchanging frames becomes
easier.
One more little thing. If you choose your frames based on your printer and
your printer to match exactly your present maximum size needs, your next
growth opportunity will force you to look for a larger printer with larger
frames. Also, if you want to use small frames in a printer that accepts
larger frames, most printer manufacturers have adapters available (or you
can build one).
Good hunting,
Ahne Oosterhof
A-Laser, Inc
(503)641-9428
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Kasprzak, Bill (sys) USX
Sent: Wednesday, March 07, 2001 05:29
To: [log in to unmask]
Subject: [TN] Standard Sizes for Screen Printers
To all tech netters:
I need some help trying to determine what "standard" frame sizes are for
screen printers. Up to this point all of our board designs were on the small
size and a 12" by 12" frame generally would suffice for our needs.
The "industry" tends to use the inside frame dimension for the size call
out. So, my 12" by 12" frame is actually a 14" X 14" frame when the outside
dimensions (OD) are measured. So then, is it still true that frame sizes are
called out by their inside frame dimensions?
We have a circuit board design that measures 10" by 19". From my research,
this board requires a 24" X 24" frame (OD 27" X 27"). This is because a
stencil of this size uses a foil size of 19" X 19". This foil size will fit
the stencil openings that I require. Any "standard" frame sizes smaller
will not fit the pattern we need to stencil.
In addition, we'll need a new screen printer. This one particular model
we're considering states that it can handle a frame size of up to 24.8" by
33.4". The rep for this model checked with the manufacturer and they told me
that any stencil manufacturer will make a stencil frame to fit the machine
and thereby accommodate this board size.
The frame shouldn't be any more expensive. I'm saying that this machine will
only handle a 20" X 20" "standard" frame size. I cannot find a standard
frame or any frame that will fit into the 24.8" X 33.4" opening.
My questions are:
1) Is there a frame that fits this 24.8 X 33.4 opening?
2) If there is a frame, is it considered a "standard" size?
3) Are there extra costs associated with getting a frame of this size?
Any info, websites to look at, or any other response will be greatly
appreciated!
Bill Kasprzak
Moog Inc.
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