| ??? 09/13/10 04:30 Read: times Msg Score: +1 +1 Good Question |
#178531 - Why relays? Responding to: ???'s previous message |
Ninad Sonawane said:
Sorry about the mess up.
What i am doing is trying to make a bigger dot matrix printer with a pin matrix of 8*32 and 12*36. That is why I require to control 256 or 432 pins. I am already on my way to design a GUI which will take any design as input and convert it into hex values. What, exactly, do you mean by "design"? Is it a graphic image segment or is it something else? These values will be stored in the data memory of the controller or on an external memory. What i want to do is to actuate all these pins in under 450ms according to the data. That means I will be using a relay. Why does it require a relay? So for that i want an analog voltage with discrete values which will turn the relay ON and OFF according to the data. Why does this require analog values? This should be done in before the paper is scrolled vertically i.e. under 450ms.
It it sufficient or do you need any more specific details. I've looked at the innards of many dot-matrix printers and have never seen any that use relays to drive the printhead(s). I'm curious why you'd want to use a relay. Please explain that and the other items I've mentioned. RE |
| Topic | Author | Date |
| I/O pin extension | 01/01/70 00:00 | |
| Start by specify your need | 01/01/70 00:00 | |
| you really have to list down the full requirements | 01/01/70 00:00 | |
| A suggestion | 01/01/70 00:00 | |
| Specefic Requirements | 01/01/70 00:00 | |
| Why relays? | 01/01/70 00:00 | |
| But dot matrix printers normally don't have X*Y array head | 01/01/70 00:00 | |
| Only need *one* column of dots! [ED] | 01/01/70 00:00 | |
| Head has constant speed w/o steps even with stepper motors | 01/01/70 00:00 | |
| reply | 01/01/70 00:00 | |
| not helpful! | 01/01/70 00:00 | |
| Necessity of relays | 01/01/70 00:00 | |
| Relays are not necessary | 01/01/70 00:00 | |
| What's a "design"? | 01/01/70 00:00 | |
| Discrete or integrated | 01/01/70 00:00 | |
| So what's the reason for a slow ctar-at-a-time head? | 01/01/70 00:00 | |
| Printer Purpose | 01/01/70 00:00 | |
| Still no specific reason for a matrix! [Ed] | 01/01/70 00:00 | |
| More care while finding solution | 01/01/70 00:00 | |
| RE: "many others" | 01/01/70 00:00 | |
| Smaller than a relay | 01/01/70 00:00 | |
Relays Take Drivers Too | 01/01/70 00:00 |