Hello,

All 'modern' machines, say in the last 20 years made by reputed makes such as Arburg are closed loop machines. So you may set the value to 2000 bar but the machine will only take what it needs to inject at the speed you have input. So at lower speeds you may need only 400 bar but at higher speeds it may be 700 bar. So if you set the machine value at 2000 or 20,000 it will not matter.

Your car in cruise control is a closed loop system. Think when you are driving your car, you want to drive at 40 miles per hr, you will depress the accelerator half way, you want to go faster you will depress it a little more. The car will do this automatically in cruise control.

So all is good with your machine
-Suhas