Try:  LPKF Cad/Cam Systems Inc.
http://www.lpkfcadcam.com

or

Quick Circuit
http://www.t-tech.com

They work on all the materials you suggested, But Teflon/Duroid require
high RPM speeds and extra machining requirements.

Great tools for prototyping quick op-amp circuits, filters, etc
-----------------------------------------------------------------------------------------------

Dave Schaefer wrote:

> We are considering purchasing a PWB Prototyping Machine for our
> facility, and
> request feedback on the following issues:
>
> 1    -     Suggested vendors / service, support experiences.
> 2    -     Types of material  available & vendors (FR4, Getek, Teflon
> /
> Duroid, etc.).
> 3    -     Sources of multilayer  material.
> 4    -     Thicknesses of materials suitable for processing.
>
> Thanks,
> --
> Dave Schaefer
> Phone
> : (204)631-2298
> Senior PWB Designer                                         FAX :
> (204)631-2475
> NORTEL - Broadband Wireless Access          email : [log in to unmask]
> 37 Stevenson Road
> Winnipeg, MB R3H 0H9
>
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