Question about Coffee Makers & Espresso Machines
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What does Coercivity Mean?
Coercivity is the term used to designate how strong a magnetic field must be to affect data encoded on the stripe, and therefore, how immune the data is to damage.
Measured in Oersteds (Oe), the coercivity of a common credit card is about 300 Oe, considered low coercivity. Consequently magnetic money clips, refrigerator magnets, etc., play havoc with the data on your credit card's stripe. High coercivity (HiCo) magnetic stripe technology relies on particles -- generally barium ferrite (low coercivity uses iron oxide) -- with coercivity values ranging from 2500 to 4000 Oe.
The encoding technique is the same as for LoCo technology, except that it requires a stronger electrical current in the write head. Virtually immune to domestic-type magnets, HiCo substantially decreases the chances of accidental data erasure. Despite this superiority, HiCo hasn't yet replaced LoCo technology, due to the widely established base of LoCo encoders and the increased cost of HiCo encoders. Standard magnetic stripe readers, however, can read either HiCo or LoCo stripes.
High-coercivity cards are currently used in applications where the need for performance, for example in critical test equipment, outweighs price. A single magnetic stripe can hold several tracks of recorded data, which can be rewritten and updated. The ISO\IEC 7810, 11, 12, and 13 series of standards specify a three-track format, encoding scheme, and bit density for all financial card applications.
Jun 21, 2016 | Computers & Internet
This can be due to many faults and need a full check up but I can fill up with few tips.
1. If the cassette loads and the take up spool does not turn then the machine will shut and rewind.
2. If the take up spool rotates but then it shuts down then the reel sensor at the bottom of the forward wheel can be faulty- there are opto devices or proximity sensors/magnetic type.
3. If the drum does not rotate it will shut down as well a fault in the SERVO section.
4. Defective HALL IC can shut the switching and so the servo will shut down the processor.
5. Fault in the power section to deliver the correct voltage to the circuits/loading servo to take up.
6. Finally if the loading is not to the MODE switch point or failure of mode can make the loading to trip as it will not complete the load to the desired point.
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