Kuper Pinout
------------
cam step   - pin 4
cam dir    - pin 23
pro step   - pin 3
pro dir    - pin 22
cap step   - pin 6
cap dir    - pin 25
filt step  - pin 7
filt dir   - pin 26


Parallel Port Pinout
--------------------
buckle         - port #1 pin 15
viewer         - port #1 pin 13
pro home       - port #1 pin 9
cam home       - port #1 pin 10
cap home       - port #2 pin 8
filt home      - port #1 pin 7
pro deenergize - port #1 pin 4
cam deenergize - port #2 pin 5
pro tension    - port #1 pin 3
cam tension    - port #1 pin 2