Homebrew PCBs

At 11:18 PM 08-07-16, you wrote:
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>"Cristian crissstian@... [Homebrew_PCBs]"
><Homebrew_PCBs@yahoogroups.com> writes:
> > That means 100% overexposure-good news for me.
>
>No, that means if you're off by 100% from the sweet spot, you'll start
>having problems in some boards. It's easy to find the sweet spot, and
>IMHO stupid to skip that step, since it's so cheap and easy and make
>sure your boards *always* expose properly.
>
>If you don't have one, buy one of these (T2115, the 21-step version):
>http://www.stouffer.net/TransPage.htm
>
>It's $7 plus shipping and will save you a lot of headaches.

I'll never under-expose. Is not possible.
My problem is that at the beginning of a trace will be a little over-exposure.
First the UV is ON and after a while it moves = overexposure.
My UV source is moving to expose that trace.
Cristian