7' X 4' Combi

[Jonathan]

ive set steps per to 20 Velocity to 3000 accl to 200, Oh im using metric, now when you type in X1000 the gantry travels 1M so that much is correct but im not sure it is the only way to do it the drivers are on the lowest setting which is 200 per rev.

200mm/s^2 for the acelleration is very low. You should be able to get around 1 to 2 m/s^2.
The motion will be a lot 'smoother' if you use microstepping. I reckon you'll get around 8m/min, so that's 133mm/s. 200 step/rev is 20 step/mm, so 25000/(133*20)=9.4. So you can have anything up to 9.4 times the number of step/rev ... so try 1/8th microstepping.

with four people sitting on the gantry it dosnt evn know you are there..

The overall mass of the gantry doesn't make much difference to the feedrate you can get, it mainly affects the acceleration obtainable (Newton's 2nd law). Increase the acceleration and it will 'notice' plus the people will probably fall off which is an added bonus.