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What type of D5 pump do you have...the normal analog one with the little red rotary potentiometer...I have been testing & learning with the aquaero 5 LT; plus 2 D5s and 1 MPS400. Great stuff overall. The 2 D5s are mounted in an XSPC dual reservoir.
One thing I have found is the the D5s seem to have a minimum power/speed of 25% (resulting in about 1800 rpm) and I can't change this. Is this on purpose, if so why, and is there any way to change it? I mostly feel I should have max control if I want.
Thanks.
I don't know why you would really want them to run any slower, at the minimum speed they generate very little pressure. The thing is, that all D5's are made by Laing and even though some have different features the core components are identical.
25% of total available volts isn't the same as "25% speed", technically. Every DC powered device, be it a fan or pump, has two important voltages to keep in mind:
1. Minimum starting voltage. This is the voltage required to get the thing spinning from a dead stop. My Yate Loon fans have a minimum starting voltage of around 3.6 volts, for example.
2. Minimum operating voltage. This is the minimum voltage that can be applied to a device and still have it function (spin). My Yate Loon fans can operate down to around 2.2-2.3 volts. That's about 19% on the power scale, but 1% on the speed scale. See how they don't match up?
The first is important to know, as if you're using a device intermittently (my fans are set up this way), you need to apply that voltage or slightly less in order for it to start successfully. The second is important as, if you want the device to continue to run, operating voltage must never dip below this number.
This plays into the fan setup in Aquasuite. Your pumps will likely run continuously, so you'll check the "hold minimum power" box. Then you'll want to set the minimum voltage to a number that's maybe 0.1 volts higher than minimum operating voltage for safety. You check "Use Startboost" under "Advanced" to make sure it gets enough voltage to start initially.
Since your pumps aren't cooling anything right now, you can play with the voltages and find the absolute minimums for voltage. Be aware that once you add all tubing and blocks to the loop that you might need to apply slightly more voltage due to resistance in the loop. If you're able to keep the pump spinning at 25% of 12V right now, that's only 3 volts, and that's fairly low voltage. Most pumps and fans don't like to operate at voltages less than 3 volts. Most stop spinning somewhere at less than 3 volts minimum operating voltage. I imagine the pump has got to be silent or very nearly silent at that speed anyway, so I wouldn't sweat it if it won't go lower. You'll want the pump spinning faster anyway, as the flow is pretty low at the bottom of the speed curve.
I have the vario D5s and they voltage control just fine with them set on 5. They just dont spin as slow as when using the built in 5 settings on the control switch.The USB D5 pumps aren't voltage controlled anyway. They have an internal motor controller just like the D5 Vario, that has a set minimum speed of 1800RPM that equates to the 25% power setting in Aquasuite.
Hi there. I can't hit RPMs below 2800 via aquaero 6 voltage regulation for D5 vario pump (one step below and pump shutting down).
Manual regulation by potentiometer has 1800RPM minimum.
Any reason for that behavior?
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