?
Solved

dot matrix head

Posted on 1998-09-08
1
Medium Priority
?
328 Views
Last Modified: 2010-04-12
i have an old dot matrix printer and i want to use its head (8 pin )without using the printer ,so where can i find the electric data sheets of its Andhow can i control it independant of the printer
please send you anser soon
thank you
0
Comment
Question by:nilehawk
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 12

Accepted Solution

by:
mark2150 earned 200 total points
ID: 2012551
Ok, you don't really need the head specs as a head is nothing more than an inductive coil.

You can get the DC ohms by measuring the resistence to common.

They are deigned for pulsed operation. Continuous DC will rapidly short out the head. You can derive the pulse rate by multiplying the CPS spec of the printer by the width of a char in dots. This is the pulse rate of the printhead. So if it prints, say, 100CPS and each character is 7 dots wide then the pulse rate is 700Hz - this is also the pitch of the annoying "zzzing" noise the printers make.

What brand of printer?

Heads usually run on +12 or so. You can check this by measuring the voltage on the common line to the print head. Most drivers are "low side". That is to say that the printhead common is the + supply and the driver's switch the low side of the coils to ground.

Since they're an inductive load you'll need kickback diodes across the coils to prevent back EMF from frying your driver electronics.

The printhead is not designed to be operated without a platen (the rubber roller). This (and the ribbon & paper) provide a limit stop and cushion for the print wires.

Pardon my curiosity, but what are you trying to make with an old printhead?

0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Causes of paper jams:The following are the main causes of paper jams. Guides:If the guides for the paper are not set correctly they may cause the paper to enter at an angle. You should ensure that the guides are set correctly for the paper type a…
When I recently replaced my image transfer kit on my office HP color laserjet 5550dn printer, I had a slight problem.  The left bracket that holds the transfer kit got stuck in the upright locked position instead of being at a 45 degree angle facing…
In an interesting question (https://www.experts-exchange.com/questions/29008360/) here at Experts Exchange, a member asked how to split a single image into multiple images. The primary usage for this is to place many photographs on a flatbed scanner…
This video Micro Tutorial shows how to password-protect PDF files with free software. Many software products can do this, such as Adobe Acrobat (but not Adobe Reader), Nuance PaperPort, and Nuance Power PDF, but they are not free products. This vide…
Suggested Courses

764 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question