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Digital BW, The Print

Index last updated: 2026-04-28 22:56 UTC

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Re: [Digital BW] Re: Dithering

2001-10-04 by Bob Obenland

As one who stared at the heads passing over the paper
in my (partially disassembled) 3000 for too many hours,
the dot pattern (dither) is very different in the v6 driver than
the original piezo driver. 

Long ago this was a main topic on the piezo list.
The "unforgiving" nature of the original driver
required absolutely perfect paper feed to avoid banding.
To my eye the v6 driver uses something similar
to the famous epson dither combined with
a) separation of tones into ink channels and
b) tighter dot placement.

If you watch the leading edge of the image
with v6, the image "develops" in a soft gradation
as the head makes successive passes. The old driver
used to create distinct bands of tone trying
to do everything at once.

This is with my 3000 only.
No knowledge of anything else.

;-))

Thanks
Bob

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