On Fri, 16 Mar 2012 16:21:51 -0000, you wrote:
>Thanks for the info - that works a treat. I'm just learning Eagle - much more familiar with ExpressPCB, but that program does not allow me the option of mirror for top layer. This new HP laser P1102 does not have the mirror option in the software either - not like ALL the older HP laser printers I've had.
Depending on how linear your printer is, when trying to match layers,
you may wish to do the following:
1) on the top layer, check mirror and upside down.
2) on the bottom layer, do not mirror and do not upside down
That ought to put the left side of the board on the printer on both
the top and bottom. If your printer is a bit non-linear across the
page, the non-linear parts might match. Ideally, the board is
properly centered.
Harvey
>
>Thank you again,
>
>Ken H>
>
>--- In Homebrew_PCBs@yahoogroups.com, Harvey White <madyn@...> wrote:
>>
>> On Fri, 16 Mar 2012 00:38:22 -0000, you wrote:
>>
>> >If Eagle has this option, I've not found it yet - doesn't mean it doesn't have it.
>>
>> polygon, properties, uncheck solid fill, then the parameter for the
>> pattern is effective (it's not isolation).
>>
>> Harvey
>>
>> >
>> >Ken H>
>> >
>> >--- In Homebrew_PCBs@yahoogroups.com, Leon Heller <leon355@> wrote:
>> >>
>> >> On 15/03/2012 17:21, sailingto wrote:
>> >> > I had wondered about the photo etch method and if it had this problem.
>> >>
>> >> It will have if you use a laser printer to create the transparencies.
>> >> You must use an inkjet printer.
>> >>
>> >> >
>> >> > The mesh method is mentioned - do you mean use a very fine mesh pattern
>> >> > for the solid ground plane? I'm not sure how to do this in Eagle or
>> >> > ExpressPCB programs. Sounds like a good idea - mesh fine enough it
>> >> > "looks" solid on transfer?
>> >>
>> >> It's more a "cross-hatch" pattern than a mesh, using, say, diagonal
>> >> lines at right angles, with something like 10/10 mil lines. The Pulsonix
>> >> software I use has a cross-hatch option for copper pour and power/ground
>> >> planes.
>> >>
>> >> Leon
>> >> --
>> >> Leon Heller
>> >> G1HSM
>> >>
>> >
>>
>