USING A MPG
The QtDragon interface allows for the use of an external Manual Pulse Generator (MPG) by checking the Use MPG checkbox. When enabled, the Jog joypad highlight segments indicate which axis is selected for jogging.
Generally, a separate HAL file is used to define I/O pins that connect to the MPG and the qtdragon_postgui.hal is used to make the connections to the jog joypad widgets. The UI was originally made for use with a Mesa 7i96 FPGA board so it is limited in the number of I/O pins. Using a board with more I/O would allow the Scale pins to be used as well, with the proper modifications to the source files.