- Digital Readout - 
Description

MagEncoderBot320x240

MagDisplayPhoto320x240 MagDisplay320x240

Project

The DRO project realizes a digital readout (DRO) for mills, lathes or other devices using linear magnetic strips with a magnetic pole length over both poles (N and S) of 2 mm. It contains the sensor PCB that is based on an Austria Microsystems AS5311 encoder chip and a 3 channel display PCB that is based on an Atmel ATMega8 microcontroller for each channel. 

Magnetic strips are cheaper and smaller but a little less accurate than glass scales. On the other hand, they are more accurate, more reliable and faster than digital caliper based readouts. 

Basic features

  • DRO with 3 fully separate display blocks with 7-segment LED displays - Six digits plus sign. It is possible to build the display for 1, 2 or 3 channels as the display blocks are fully separate. 
  • Maximum resolution on display is 0.001mm. Option to round values to 0.005mm steps. Display shows inch or metric values. 
  • Overall accuracy is strip-dependent. The resolution of the Austria Microsystems AS5311 is 488nm. 
  • Two push buttons per channel to zero the scale and to switch it to relative mode. 
  • Selectable lathe mode doubles the distance shown. 
  • Simple menu to set different values that are stored in the controller EEProm.

Included in the project files

All files and sourcecode needed to build the DRO are included in a single ZIP file. 

Further information

Display unit

Sensor unit

Links

Downloads

We use cookies on our website. Some of them are essential for the operation of the site, while others help us to improve this site and the user experience (tracking cookies). You can decide for yourself whether you want to allow cookies or not. Please note that if you reject them, you may not be able to use all the functionalities of the site.

Ok