So far you've only mentioned Biceps,Shoulders,Chest, and abs. What happened to your back, tris, and legs? As for chest I'm not sure about other peoples opinions, but I feel machines do not work as well as free weights. Try incorporating flat bench (or other Benches) and DB press in your chest exercises. Also, flys could be helpful too. For your three day workout try getting all muscle groups done in that 3 day period. example Day 1 Bis,Back, shoulders - Day2 Chest and tris and abs or throw abs onto day 3 which will be your legs.

You said you've been working out for a year has this been your plan the whole time? and have you any goals?