Uni-Hammer Printer
Uni-Hammer printers were used as computer printers and were mainly produced by Seikosha for the home computer market. This printing method is used in some printers of the MPS series, such as the MPS-801, VIC-1515 and VIC-1525, but re-branded as Commodore devices.
Unlike traditional dot matrix printers, which use multiple pins to strike a stationary roller, the Uni-Hammer employs a single printhead that impacts a rotating ribbed drum positioned behind the paper. This mechanism allows the Uni-Hammer to create one dot at a time, with each dot being produced individually. In contrast, typical dot matrix printers utilize a multi-wire printhead to generate 8 or more dots simultaneously by striking a fixed platen.
In contrast to true dot-matrix printers, their production costs are low due to their simple construction, although with a correspondingly high reliability. However, the disadvantages arguably outweigh the disadvantages: The printing method is very loud, with lengthy printing times and low resolution.
Advantages[edit | edit source]
- Low susceptibility to faults due to simple technology.
- Carbon copies can be made.
- Usability of continuous (fan-fold) paper.
- Low purchase and operating costs.
Disadvantages[edit | edit source]
- Very high noise level during printing.
- Very poor resolution.
- Unsuitable for graphics.
- Very long printing time.
