any of you guys deeply understand central oiler systems and line meters, ones like
i take it you put pressurized oil at a manifold to which various lines connect, each having one of these meters where it enters the machine's casting or wherever. the sizing of the central bore & piston in the meter determines the relative flow, ie if you had 5 lines, you might want 1&2 each getting twice the oil as 3,4&5....is that more or less correct? this sounds fine and good except that it doesn't take into account differences in flow resistance down stream from the meter....so its a bit hit and miss whether the oil actually goes where you want it, right? you may want X amount of oil in line 1&2 but 1 say has far more resistance that 2, they're not going to get equal amounts then.....or do you guess at this when you're sizing the meter to use for the line?
how well do these work? for example and are there any rules of thumb on the relative dia of bore and piston? anyone make their own meters?
i had an alternative idea; a system with each line was in turn connected to the oil under pressure, and different volumes would be delivered by exposing the line for different lengths of time, or rather each line is exposed to the pump for a % of the pump's stroke (instead of all lines being connected together and meters controlling how much oil goes where). the advantage would be you don't have to buy or make the meters and more positive control over where the oil is going. The idea would be a diy central oiling system with its own hand pump. I just don't have very much experience with central oilers and half wonder if I'm dreaming up solutions needing a problem?