Mine are machine weights, too, HFWR. Yesterday I increased to 18.3 tons. I do this same, full workout three days a week.
I was a little reluctant to list the actual weights I do on each machine, because I know a lot of people here lift higher weights than me. But hey, you listed yours, so I guess I will too, even though mine are lower. I'm a 64 year old woman so I hope people cut me some slack. My weight lifting workout is one that I devised on my own because it is what floats my boat and feels good for my body. It is giving me the results that I want, so I have no interest in changing it (although I may add cardio workouts at some point).
Right now for each workout I am doing 2 sets of 10 reps on each of these 20 machines, in more or less this order in about 40-45 minutes, 3x/week:
UPDATED 8/8/2012:
Keiser triceps pushdown machine: [-]140 lbs.[/-]
150 lbs.
Keiser biaxial chestpress machine: [-]50 lbs.[/-]
55 lbs.
Keiser upper back machine: 65 lbs.
Cybex back extension machine: [-]145 lbs.[/-]
150 lbs.
Nautilus compound row machine: [-]110 lbs.[/-]
120 lbs.
Nautilus lateral pulldown machine: 110 lbs.
Nautilus chest press machine: [-]65 lbs.[/-]
70 lbs.
Nautilus abdominal machine: [-]110 lbs.[/-]
115 lbs.
Nautilus arm curl machine: 45 lbs.
Nautilus triceps extension machine: [-]65 lbs.[/-]
70 lbs.
Cybex leg extension machine: 45 lbs.
Cybex leg curl machine: [-]110 lbs.[/-]
115 lbs.
Cybex calf rotator machine: [-]145 lbs.[/-]
150 lbs.
Cybex hip abductor machine: 135 lbs.
Cybex hip adductor machine: [-]135 lbs.[/-]
140 lbs.
Cybex abdominal crunch machine: [-]110 lbs.[/-]
115 lbs.
Cybex arm extension machine: 70 lbs.
Cybex fly machine: [-]45 lbs.[/-]
50 lbs.
Cybex overhead press machine: 45 lbs.
Cybex seated row machine: [-]85 lbs.[/-]
90 lbs.
Those average [-]91.5 pounds[/-].
95.25 pounds.
(2 sets)x(10 reps)x(20 machines)x([-]91.5 pounds[/-]
95.25 pounds)x(.0005 tons/pound) = [-]18.3 tons[/-]
19.1 tons for each workout. At least, that is how I have been calculating it.
Since I do 2x10 reps on each of these 20 machines in 40-45 minutes, I guess this is borderline circuit training. Whatever. My heart rate responds as much for one of these workouts as it does when I ride my exercycle, so maybe that is why. All I know is that it feels like what I need, KWIM? And it is fun, bopping from machine to machine like that. I also spend 5-10 minutes at the stretching station which is absolutely vital for me as I grow older.
I don't do the leg press because of bad knees, and I also go extremely lightly on the leg extension for the same reasons. I go lightly on things like arm curl and overhead press because that is the best I can do right now!
My biceps are wimpy (being an old lady is my excuse, but anyway I am working at it).