i have a similar table but on ours when you release the table screw knob it always rises under its own spring.the table I have has one central column with a large screw knob which has to be loosened to raise or lower the table and then tightened again. there is no help from a spring.
then i would suggest that is not normal operation.This camper is new to me and I will have to have a good look at the table, perhaps the spring is not working or not present, when the table screw is released the table doesn't take any pressure to lower it, and to raise it I have to catch the table top and pull upwards.
Ours on a 5 year old Burstner jammed in the 'down' position about 10 days ago. Took the table top off [8 screws] and spent a lot of time cleaning out accumulated dust and muck where the inner cable enters the outer sleeve and then sprayed grease in several applications until the cable eased and the cam at the top of the central leg support column freed up.Has anyone any experience with these tables? Its very easy to lower to make up bed but its not so easy to lift it again. Has anyone done anything to improve these or these be fitted with a gas lift?