4 New 6105s clicking on startup

Are you using an Apex VDM to control these? Mine did the same thing until I "messed" around with my program and finally figured out I had a programming error of some sort. I can't remember what I did though. Rest assured, there is little chance four Tunzes have the same defect in them. It has to be the controller (hardware, software, program, or connection) :).
 
It does depend on the controller to a great extent. If this is happening with one of our controllers let us know. Our controllers use a ramp to full speed to quiet the start.
 
I am using an apex. I set my low to 25% and it sovles it however it cuts my wave in half. Some how I think they could be beter as a friend of mine has 6055s that do not have this issue. One of mine did stop clicking. Not sure what is different.

Also I have two that at 100% are almost dead quiet, one that has a low rattle sound i could live with if i had to and one that has a rattle sound that is very anoying. Any suggestions for that?

The power supplys are set at 24v.
 
The 6055 is a smaller pump and as such will always be quieter, there is less moving mass and less possible vibration.

25% could damage the pump, acceptable settings are 30-100% and 0% or off, 1-29% are not recommended as the pump can overheat and stall.

I will list every possibility below:

1) The controller is likely part of the problem, we make our controllers to ramp up in wavemode (7092 and 7096) and this eases the magnet down on start, which avoids the slap of the magnet hitting the base of the pump and I know of no workaround for other brands of controller. Basically over a fraction of a second the pump accelerates from 0-10% and then jumps to 100%, this happens over about 1/10th of a second.

2)The propellers could just be stiff, for the first 2 months parts are wearing in, over half of this wear in occurs in the first 2 weeks. Pumps usually get quieter in time.

3) If a pump is in a corner or the cord is against a hard surface, reverberation noise against a side pane or items in contact with the cord will worsen noise issues.

4) If the front housing is not fully engaged it can vibrate as well, make sure the gap is even and all tabs are engaged.

5) It is possible the drive magnet/propeller has some sort of blemish or defect, in general a few weeks of use will remove small blemishes.

6) if the pump was dissassembled and cleaned it could be the disk was accidentally lost or removed or improperly reinstalled- part 3005.740. This disk should have the blue cup at the very bottom, the magnet spins on the slotted side of the black disk.
 
OK my two noisy ones have been in the tank about 4 days less. I will give it a couple weeks. Also will change my setting. So if I understand, I can have the pump go from 0% to anywhere between 30% and 100% without damage it just might cause the click/clunk? However any setting from 1% to 29% can cause damage.
 
That is correct, see if they don't quiet down over the next two weeks. In general you will see a 50% noise reduction after 2 weeks and a further 25% reduction over the next couple months.
 
I wouldn't go that far, it is largely personal preference and there are trade offs with selecting any controller.
 
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