- Digital Readout -
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.
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.