Screen printing & controlling size of dot pattern in gradient halftones gradien

I'm using A Mac OS 10.6.8, and Illustrator CS5.

I do garment screen printing.

In my designs I use a gradient, which needs to have the halftone dots controlled, and a certain size, to expose properly on my screens to then print.

I can't seem to figure out how to adjust the frequency or LPI, and the angle so that they work. It still prints out as a seen on screen

Thanks ahaead of time for your reply.

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