Hi,
As a less than proud owner of a EFD Ultra machine with $7k DV7000 valve I
can absolutely assure you that EFD is not light years ahead.
Other than using a PDA with a "Fall Off" connector as a controller you are
left to decode the low level command language on your own. I had to use a
RS-232 protocol analyzer to figure out the initialization requirements. With
that I was able to decode their other protocol "Atoms" and build my own app.
With machine control in place I started with their "Wonder Valve". (With
experience I now Wonder why I bought it.)
As for the $7K valve on small dots (10mil) it is like painting a wall by
sitting the paint can next to the wall and kicking the can. The dynamic
range of the valve was terrible.
If you want a $25K paper weight it works real well.
Thanks,
Bob Kondner
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D.
Sent: Monday, January 18, 2010 11:18 AM
To: [log in to unmask]
Subject: Re: [TN] Dispensing system
The Nordson EFD dispensers are capable of using both the auger valves
for the larger jobs, as well as their time/temperature adapters which
allow direct dispensing from the cartridges through a microjet system
for very small dot and line sizes. So if you want to stop the machine
and dispense some other epoxy, you do not need to tear down the auger
valves and clean them, then set them up again.
Nordson/EFD is light years ahead in micro-dispensing technology.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Roger Mack
Sent: Monday, January 18, 2010 10:02 AM
To: [log in to unmask]
Subject: Re: [TN] Dispensing system
We use Creative Automation. The positive displacement pump gives
excellent
control of dot sizes, and can also be programmed to dispense beads or
patterns. We have both the 3700 benchtop and 8300 inline models which we
use for chipbonder. Their application engineers have always been very
helpful, and other pump styles are available depending on the
application.
We have tips if we need to run 0402 or smaller, but currently
discourage
gluing parts this small in our DFM rules to make life easier.
Whatever you pick, if you do not use it daily make sure it is easy to
clean out or purge. For the Loctite 3621 chipbonder we only allow one
month out of the fridge. If a syringe is not empty in that time it is
disposed of. Exceeding shelf life and expiry dates will affect adhesion.
Since we have replaced all but one of our wave solder machines with
select
solder we often only glue a few small parts per board and were finding
that some heads were not using even 30cc's per month.
Any manufacturer will run samples for you so you can make sure they are
capable of meeting your requirements.
http://www.creativedispensing.com/
Roger Mack P.Eng.
Manufacturing Specialist
Parker Hannifin Electronic Controls
Electronic Controls Division
1305 Clarence Avenue
Winnipeg, MB R3T 1T4 Canada
direct 204 453 3339 x373
[log in to unmask]
www.parker.com/ecd
Syed Ahmad <[log in to unmask]>
Sent by: TechNet <[log in to unmask]>
01-15-2010 14:44
Please respond to
TechNet E-Mail Forum <[log in to unmask]>; Please respond to
Syed Ahmad <[log in to unmask]>
To
[log in to unmask]
cc
Subject
[TN] Dispensing system
We are looking for a state-of-the-art dispensing system capable of
making
very fine features. We do not have a spec set yet but we are considering
nScypt benchtop system. Is nScrypt the best choice? Does any one know
of
a
competitive or better performing dispensing system to make very fine
features? Any references for comparison or consideration will be
appreciated.
As we are a university research center, we can not limit the possible
uses
of this system but would welcome if a system has greater utility in the
future. We may be using the system to dispense all kinds of materials as
long as it can.
Thanks.
Syed.
Syed Sajid Ahmad,
Center for Nanoscale Science and Engineering (CNSE)
North Dakota State University (NDSU)
http://www.ndsu.edu/cnse/
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