Hello Bob,
We have an Essemtec semi-automated printer (https://www.essemtec.com/en/). It has a board support table and manual knob adjustments for stencil alignment. The print head and table up and down movement are semi-automated. It works very well for printing small quantities of circuit boards, and gives very repeatable results.
Best regards,
Tony Lentz
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bob Cochran
Sent: Friday, June 9, 2017 9:55 AM
To: [log in to unmask]
Subject: Re: [TN] seeking recommendations for a manual stencil printer... - Bayesian Filter detected spam
Thank you Joyce, Wayne, Brien, and Robert for the replies and sharing your insight and recommendations.
Some additional info:
Our boards are small ( less than 10 cm x 10 cm ), 62 mils thick, lead-free, commercial, and use 0402, 0.5 mm pitch BTCs and BGAs, etc.
We have been just taping down the stencil over the board and manually running the squeegee over the stencil for some early proof-of-concept throw away protos.
The desire to have a manual printer is to create a repeatable and tweakable process for building several boards (same PCB) over the duration of a day to several days (perhaps applying fine grained tweaks to the screws / knobs of the printer ) as we go. Ideally, our settings could be recorded and repeated at a later date ( after breaking down and setting up again ).
Please continue to share recommendations and insights, and I'll reply again soon with some results to my inquiries with various printer manufacturers / vendors.
Thank you
Bob
On 06/09/2017 11:32 AM, Robert Kondner wrote:
> Hi,
>
> I have used everything between metal foils taped on a desk to a MyData MY600 paste printer.
>
> High quality probably means the final paste image and that is dependent on many items. Squeegee pressure and speed control is primary. But then so is stencil alignment. And foil thickness and paste type. I think these affect quality more than the mechanical stencil printer.
>
> And the low cost issue depends a lot on how many boards of how many different types you print. Cleanup is a big parts of the cost due to time. Nice thing about real low end printer is they setup and tear down easily. The all hold a stencil quite well. Setup of the holding stage with shims and cardboard takes time ans is a majore setup cost.
>
> Quality is also dependent on operator skill and inspection / touchup.
>
> For me here in my shop a lowest end Asian made unit with no speed or pressure control works ok. But I only do prototyes here, never more than 25. And I print one up boards so the size of the stencil is small. If you plan on doing 20 x 20 images that is a different universe.
>
> As for the My600 printer at $200K a piece they can be well worth the dollars. At AA they were doing 10 to 20 jobs a day and spending $1000+ a day on stencils. The My600 was a real fast payoff. And the first time I looked at a printed board my jaw droped. Dropped down below where it dropped whan I first saw the price tag.
>
> Bob K.
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Bush, Brien
> Sent: Friday, June 09, 2017 6:44 AM
> To: [log in to unmask]
> Subject: Re: [TN] seeking recommendations for a manual stencil
> printer... - Bayesian Filter detected spam
>
> We use Transition Automation for our prototype and odd shaped boards
> that will not run in line. We have used them for the past
> 25 years and no complaints. Easy to set up and use.
>
>
> Experience the benefits of Precision Engagement
>
> Brien Bush
> Manufacturing Applications Specialist
> Phone: 603.249.9190 | Fax: 603.249.9192
> [log in to unmask] www.cirtronics.com
>
>
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>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Bob Cochran
> Sent: Thursday, June 8, 2017 6:42 PM
> To: [log in to unmask]
> Subject: [TN] seeking recommendations for a manual stencil printer...
> - Bayesian Filter detected spam
>
> Hi,
>
> We want to bring in house a high quality, low cost manual stencil printer for prototyping / reflowing several of the same PCB in a batch run.
>
> There are many, many models out there to choose from, but the specifications seem to be limited.
>
> If you can recommend one, please do so. And if there are ones to stay away from, then please share this, too.
>
> Thank you,
>
> Bob Cochran
>
>
> --
> Robert E. Cochran
> Mind Chasers Inc.
> https://mindchasers.com
> 297 Route 72 W, Suite 35-315
> Manahawkin, NJ 08050
> WARNING: Export Control This message, including any attachments, may contain technical data within the definition of the International Traffic in Arms Regulations (ITAR), and subject to the Export Control Laws of the U.S. Government. Transfer of such information by any means to a foreign person, whether in the United States or abroad, without proper export authorization or other approval from the U.S. Department of State is prohibited.
>
--
Robert E. Cochran
Mind Chasers Inc.
https://mindchasers.com
297 Route 72 W, Suite 35-315
Manahawkin, NJ 08050
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