The pressure compensated flow control has its own ANSI and ISO schematic symbols.
The Acme Anvils factory uses a simple hydraulic motor, powered by a gear pump, to move anvils along the factory floor.
The anvils are showing up in a regular pattern, which produces a relatively even load on the motor.
The motor is turning smoothly, causing the conveyor to move at a steady, if somewhat speedy, rate.
The relief valve is mostly closed - the load isn't enough to fully open it.
F1 and F2 prove that all of the pump output flow is making it to the motor.
Pressure varies a bit as the load on the conveyor changes between 3 and 4 anvils.
Looking for controls? Don't bother - there's nothing to control here. If the pump is running, the system is operating at a fixed rate.
This system works pretty well, as long as
Use the slider to restrict flow to the motor.
Motor speed is adjusted using the Flow Control interactive slider to change the needle valve setting.
If the needle valve is backed all the way out, for maximum speed, it no longer has an effect on the system. (It will turn grey to remind you of this.)
Dialling it in/decreasing the speed will produce more and more effect.
Flow that can no longer make it to the motor escapes through the relief valve and back to tank.
The anvils are appearing in clumps, which causes an uneven load on the motor.
No matter where you set the needle valve, the conveyor will still race when it's lightly loaded, and crawl when it's heavily loaded.
The motor rpm confirms that the speed of this conveyor is all over the place.
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