User manual

Barrett Technology, Inc.
BA4-310 System User Manual Version 1.1
37
[ ] 9. Being careful to keep the bottom-flange cable ends from crossing (i.e. top, shorter cable
should remain the top cable at the transition from pulley to pinion). Insert the longer
(bottom) cable-end’s brass lug into either of the two terminations at the top end of the
left pinion. Wind on the longer cable 1/2 turn by rotating the pinion.
Attach the remaining shorter (top) cable-end’s brass lug to the remaining termination at
the top end of the left pinion. If done properly, the second (top) cable will appear above
the first cable.
[ ] 10. Slowly rotate the pinion to wind the parallel set of cables onto the pinion surface. Use a
finger to guide the parallel cables with a double pitch onto the pinion grooves without
crossing. Make sure the cables transition smoothly into the beginning of the grooves.
After all of the loose cable is wound onto the pinion, temporarily tape the pulley surface
of the pulley/pinion securely to the outside of the base to prevent rotation and maintain
mild tension thereby avoiding sudden unwinding of the cable wraps.
[ ] 11. The parallel set of cables coming from the top-flange should appear on the base pulley
surface just behind the left pinion. Again, as with the previous set, be careful not to
cross the cables. Connect the longer (top) cable's brass lug to either of the two
terminations at the bottom end of the right pinion. Wind on this cable ½-turn by
rotating the pinion.
Attach the shorter cable's brass lug to the remaining termination at the bottom end of the
right pinion. If done properly, the second (bottom) cable will be below the first cable.
Temporarily tape the cables in place.
[ ] 12. Again, rotate the pinion to wind the parallel set of cables onto the pinion surface. Use a
finger to guide the parallel cables with a double pitch onto the pinion grooves without
crossing. Make sure the cables transition smoothly into the beginning of the grooves.
After all of the loose cable is wound onto the pinion, temporarily tape the pulley surface
of the pulley/pinion securely to the base structure to prevent rotation and to maintain
mild tension thereby avoiding sudden unwinding of the cable wraps.
5.3.2 1
st
Stage
During 1
st
-stage cable installation, the tape temporarily immobilizing the pulley/pinions may be
moved to better locations if necessary. Be careful not to let the transmission elements suddenly
rotate and unwind.
[ ] 1. Take one end of a 1829mm 1
st
-stage cable. Attach the cable's brass lug to the top
termination of the pulley portion of the right pulley/pinion.
While this pulley/pinion remains immobilized by the tape, wrap the cable 1-½ to 2-½
turns around the pulley with a right-handed pitch (the exact number of turns depends on