{"id":1133,"date":"2011-03-21T00:17:39","date_gmt":"2011-03-21T03:17:39","guid":{"rendered":"http:\/\/tangopardo.com.ar\/2cf7\/?p=1133"},"modified":"2011-03-22T12:18:53","modified_gmt":"2011-03-22T15:18:53","slug":"controlling-an-lb1946-via-usb-with-an-avr","status":"publish","type":"post","link":"https:\/\/tangopardo.com.ar\/2cf7\/2011\/03\/21\/controlling-an-lb1946-via-usb-with-an-avr","title":{"rendered":"Controlling an LB1946 via usb with an AVR"},"content":{"rendered":"

The LB1946 is a very nice chopper driver, the only downside is that it has a serial interface. So, for a project I need to control some steppers. I have a box full of printer boards, picked this one from and old epson inkjet because it had the same chips and also looks like I can chop it in half with a hacksaw and use them as they are.<\/p>\n

The logic and the original power supply were toast so I used another I had at hand. To make some tests I hacked the PowerSwitch<\/a> circuit from Objective Development to send raw commands and spin the motor with an usb interface.<\/p>\n

At the end it doesn’t look quite like the original but it works. Still can’t get more than 1000 steps per second but I think that’s because of the supply. Now that I have the basic code working I’ll have to make a parallel interface so I can use them with EMC.<\/p>\n

Sourcecode \/ References:<\/h3>\n