Belt speed
The belt speed describes the advance of a belt in distance per time, thus the transport speed ; For tape, the speed at which the magnetic tape is transported past the tape head.
Belt speed for conveyor belts and conveyor belts
For conveyor belts (→ conveyor belts ) it is also called belt speed .
Conveyor belt speed
In the case of assembly line production , the cycle is specified, which can be converted into an average speed depending on the dimensions of the production area.
Tape speed for tapes
A continuous tape speed is achieved with magnetic tape devices by the capstan or comparable drives. The exact original unit of measurement is inches per second (in / s or IPS from inch per second ). The also common metric specification in centimeters / second (cm / s) is only the rounding of the specification in inches. The first tape recorders had synchronous motors that adjusted their speed exactly to the mains frequency . For the 50 and 60 Hz conversions, other motors or belt pulleys or rollers with different diameters were offered or installed ex works.
| Nominal information in cm / s |
Origin IPS |
IPS in decimal |
Conversion in cm / s |
|---|---|---|---|
| 1.2 | 15 ⁄ 32 | 0.46875 | 1.190625 |
| 2.4 | 15 ⁄ 16 | 0.9375 | 2.38125 |
| 4.75 | 1 7 ⁄ 8 | 1,875 | 4.7625 |
| 9.5 | 3 3 ⁄ 4 | 3.75 | 9.525 |
| 19th | 7 1 ⁄ 2 | 7.5 | 19.05 |
| 38 | 15th | 15th | 38.1 |
| 76 | 30th | 30th | 76.2 |
Tape speed of tape drives (streamers) when recording data
Tape drives do not always operate at a constant tape speed, depending on the recording method. Some of these magnetic tapes are pre-formatted and only positioned on one zone - or sector. Similar to helical tracking , a sync signal is used on the tape to accurately hit the track. Without helical tracking, some of the tapes are transported at variable speeds. The Shoeshine problem occurs when there is not enough data available in time to record. To do this, the tape is stopped and rewound to the zone plus the required acceleration distance and driven past the write head again. In the case of tape drives for quarter-inch cartridges (QIC) and Travan , the belt is tangentially guided over the tape reel in the cassette, which, apart from the slip , corresponds to the tape speed. For reasons of cost, older and smaller tape drives were made using tape technology such as the datasette .
Individual evidence
- ↑ a b belt speed. In: Duden. accessed on September 28, 2016.
- ↑ The theory of power plant construction. Springer, 2013, ISBN 978-3-642-52095-2 , p. 315.
- ^ Martel Electronics: Terms commonly used for tape recorders. Tape recorder speed. ( Memento of the original from March 1, 2012 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
