Panasonic KX-P2123. (dot-matrix printer) (Hardware Review) (Evaluation)
by Ranjan Bose
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Despite the progress made by 9-pin dot-matrix printers in improving their NLQ(Near Letter Quality) fonts, their output just doesn't match the quality of a24-pin printer. A 24-pin printhead essentially has three offset columns of 8pins each. By printing each line of characters in a single pass, it not onlyprints faster than its 9-pin ancestor, it also achieves smoother curves anddiagonals on letters such as O, C, V and Y
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The downside is that most 24-pin machines are noisy. That's because they havemore pins and they print faster. A typical 9-pin character uses a matrix of 18x 18 dots, whereas a 24-pin character uses a matrix of 30 x 24 dots and getsprinted at roughly twice the 9-pin speed. Most 24-pin printers sound like adentist's drill and preclude any conversation nearby. Anything that could bedone to make them quieter would be appreciated. Enter the new line ofPanasonic machines.
Panasonic printers have always been known for their letter quality (LO) fonts,and now it's comforting to see that their new product line has been madequieter as well. The new line's latest offering includes the 9-pin KX-P2180,the wide-carriage 24-pin KX-P2624, and the 24-pin KX-P2123. The KX-P2123should be especially attractive to most Commodore owners.
Not only is the KX-P2123 quieter than earlier models, it also has several newfeatures with hardly any increase in price. The new model has a 14K buffer,compared to 10K on the KX-PL 123. The new buffer can hold approximately sevendouble-spaced pages of text! Adding a Xetec Super Graphics Jr. interface and aLQ speed of 40 characters per second means that your computer will becomeavailable about six minutes before the printer spills out the last line.
The earlier Panasonic fonts (Pica, Elite, and Micron in draft quality;Courier, Boldface PS, Prestige, and Script in letter quality) are all there,but some new ones have been added. There are lightweight Roman, medium-darkSans Serif, and a (slower but darker and sharper) Super Letter Quality Romanfont (not available in IBM emulation). For 64 users, resident LQ fonts such asthese are vital. Although GEOS offers a variety of fonts, they don't lookprofessional. It's nice to have a printer with a variety of crisp internal LQfonts.
The printing speed of the KX-P2123 is said to be as fast as that of theKX-P1123, but the real improvement is in the significantly lower noise level.Sound is measured on a log scale and each reduction by 3 dB (decibels)represents a 50-percent reduction in volume. At 8.5 dB quieter than itspredecessor, the KX-P2123 is about one-eighth as loud as the KX-P1123. Thisnoise reduction has been achieved by adding thicker and bigger covers, foamblocks, and technology that Panasonic calls Quiet Touch. Panasonic has foundthat noise is reduced when the pins are fired in a random manner, rather thanin the sequential manner used by conventional printers.
The KX-P2123 can load fanfold paper either from the rear (tractor push) or thebottom (tractor pull). Single sheets can be fed from the top, and an optionalsheet feeder is available. Single sheets or envelopes can be used after first'parking' the fanfold paper. A 'zero-inch tear off' is a convenientpaper-saving feature that advances a recently printed sheet of fanfold fortearing and then retracts the blink sheet back to printing position. TheKX-P2123 becomes a seven-color printer by adding a relatively inexpensivecolor cartridge and motor option.
On the negative side, the KX-P2123 retains its predecessor's somewhatconvoluted LED matrix front panel for setting a multitude of printer optionssuch as the font, pitch, form length, quiet mode, margins, and macros. It doesget easier once you work with it a while, but, initially, keep a bottle ofaspirin and the manual handy.
The KX-P2123 emulates Epson LQ860 and IBM Proprinter X24E. GEOS users will behappy to note that the drivers for KX-P1124 (and also for the 24-pin Epson)work with this printer. Programs that allow you to define printerconfiguration files, such as The Write Stuff, also work with a minor effort.If your program supports only older Commodore printers, however, then you'relimited to using the interface-based Commodore fonts that generally don't usethe higher resolution of 24-pin printers. The Xetec Super Graphics Jr. (ROMversion 1.3 and 1.46) works well in transparent mode as well as inSupergraphix and 1525 emulation modes. For 64 users, the primary advantage ofusing a 24-pin printer would have to be in text-based applications. You caneasily churn out a professional-looking document with a KX-P2123.
Most 64 graphic programs don't exploit the highest density available on 9-pinprinters (216 dpi); therefore, they can't use the higher (360 dpi) resolutionof 24-pin printers. The 24-pin's finer dot size and arguably better linearity(alignment of dots), however, might improve the appearance of the hardcopy.
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Although the nylon ribbons that are universally used by dot-matrix printersare economical and satisfactory, it's a pity that Panasonic and othermanufacturers don't produce carbon film ribbons. These would offer a trulyhighquality output option for those who want their documents to look theirbest. A conventional nylon ribbon actually reduces the apparent sharpness of a24-pin printer. This can be quickly demonstrated if you print a few lines(without the ribbon) through a quality sheet of carbon paper placed over theprinter paper.
Never print without the ribbon for more than a few lines, though. In additionto ink, ribbons carry lubricants that help cool the printhead and protect itfrom damage.
I found that, when using any of the double-pass printing modes, the output isbetter if the curved clear-plastic top of the removable pull-roller on top ofthe platen isn't clamped down. This is a gear-driven assembly that normallypulls the paper and keeps it taut. When locked down, it tends to pull thepaper a touch too vigorously, resulting in some characters having a dotted orbroken appearance. The pull is gentler, yet adequate, when the curved top isresting on the paper, not down all the way.
Before using the tear-off feature or fanfold parking or before loading for thefirst time, remember to set the top-of-form option. The manual neglects tomention this.
One way to reduce noise even further with this printer is to adjust theprinthead gap with the supplied lever. The chatter appreciably diminishes asyou move the printhead closer to the paper (subject to paper thickness).
If your computer system is used for any text-based application and you needgood quality professional printouts but cannot afford or justify the purchaseof a laser printer, then the color-upgradable Panasonic KX-P2123 with itstwo-year warranty is a reliable, efficient, and economical alternative.