Its based on a pic 16f887, as you can see we have wired a 15way d-type to it to connect to the 3 axis controller card. Bottom left is a connector for an ftdi usb rs232 cable.
The firmware that runs on it is also written by Stuart in assembly. It controls the stepper card, and interfaces to a pc through the Serial port.
Its got quite a nice interface that allows you to control the seperate functions of the cropper, including the manual cut, jog functions back and forth and obviously setting lengths and cut count.
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