Tagged “hardware”
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What the sensor actually sees
The optical path sets sharpness before any setting does: a light source, a lens or none at all, and a white strip the scanner reads to calibrate itself.
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Card scanners and other single-purpose devices
Devices built for one media size do that job well and nothing else. What the narrow feed path buys you, and what strands the machine years later.
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When not to buy a scanner
Most receipt problems are not equipment problems. Four situations where buying hardware makes things worse, and what to do instead.
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Buying a scanner second-hand: what to check
The mechanism is usually fine and the software usually isn't. Check driver availability first, wear parts second, and everything else after that.
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The multifunction printer as a receipt scanner
You may already own a feeder and a flatbed. Where an all-in-one printer is genuinely adequate for receipts, and the three places it isn't.
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The driver is the part that expires
Scanner mechanisms outlast their software support by years. What makes a device survive an operating system change, and what strands it.
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Wireless scanning: where the file actually goes
A wireless scanner sends your receipt somewhere before you see it. Push, pull and relay transfers differ in who handles the document on the way.
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Bus power, batteries and the scanner with no computer
How a portable scanner gets its electricity shapes what it can do. Bus power, internal batteries and card-only capture each buy something different.
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Scanner cleaning and consumables
The parts that touch paper are meant to wear out. Treating rollers and pads as consumables is the difference between a five-year device and a fussy one.
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What dpi does to a receipt scan
Resolution buys detail up to the limit of the sensor and nothing after it. Where that limit sits, and why more dpi can make a slip harder to read.
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How a document feeder works
A feeder has to separate one sheet from a stack, then move it at a constant speed. Both jobs are harder with receipts, and both wear out.
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Sheetfed, flatbed, or overhead: choosing by the paper you have
The right scanner mechanism is decided by your worst piece of paper, not your average one. What each type handles well, and what defeats it.