Well it burned a hole in me so I have set it up this afternoon.
Viola! one 30mm fan stuck on a 10mm beam with blu tack, no strap.

I can imagine it being hard to get absolutely spot on but it looks like it will be feasible if somebody has time to play.

The beam could be made from balsa with a small diameter pivot pin to get even lighter and more sensitive.

I have just spent 30mins with the 30mm fan and it now whistles so it is not as hard as I thought it may be to balance the tiny fans.

I did take the opportunity to use Dons method and I must say the method works extremely well!

As usual with a balanced fan it seems to be moving a good bit more air than when I started.

Indoor multi fan jets now there is a challenge

I have added a picture of the rotor showing the three weights I have added to achieve balance.

Bob,

Thanks for doing this - Know I know what to ask for for Christmas!

Bill

Notice

Balancers are free postage worldwide till end of Jan 2011
http://www.bobsworkshop.co.uk/outdoo...d-fan-balancer

Don

I'm curious about the weight used to balance the rotor. I know it is a putty and you gave a link to what you use but once you are done balancing, does the putty just stay there without having to adhere it in any fashion? If so, does it ever dry out and let go??

I coat it with thin CA.

i too have 2 64mm edf 4000kv balenced by don just like silk sound even better when run as a twin

I purchased a balancer from Bob and within a week i had it sitting on my table. Works great , so far have only balanced one small fan that took about 1/2 an hour till i got the hang of it . Runs very smooth now i had spent an hour or so trying to balance it by trial and error and had it pretty smooth but using the balancer made it perfect.
Hope to use it on some 100 and 120 mm size fans in the future along with some small turbines.
Todd

I got mine last week (quick and excellent service) and sat down last evening and balanced my Alfa 60 mm fan. WHAT A DIFFERENCE!!! My main problem now is that I want to rip out all my other units as well

Ok after giving Don $cash about the ptrice of one of the units.... over the last 1/2 year I pulled the trigger and ordered a Balancer. I am hoping I can get some customers at my local hobby shop to offset the cost.

Fun Fun,

John Fruge
Madera, CA

OK, I have a question here:

I just received my balancer today. When I set the support bar on the magnets the beam is propped up in the air by the rubber tubing on the screws at either end so that only one side of the support bar touches a magnet. Looks like the rubber tubing is too long on mine. I'm fine with trimming it down but I need to know how far it should be trimmed. Should both sides actually touch the sensors with the support bar resting on the magnets? Or should the beam see-saw a little? If so, how much?

Oh, and I like the new flexible light shaft that can retract into the unit when not in use. That's a nice feature. Could be refined even more but it's still way nicer then what's in the pics in the manual.

An easy access battery door would be nice too.

Originally Posted by Oreo

OK, I have a question here:

I just received my balancer today. When I set the support bar on the magnets the beam is propped up in the air by the rubber tubing on the screws at either end so that only one side of the support bar touches a magnet. Looks like the rubber tubing is too long on mine. I'm fine with trimming it down but I need to know how far it should be trimmed. Should both sides actually touch the sensors with the support bar resting on the magnets? Or should the beam see-saw a little? If so, how much?

Oh, and I like the new flexible light shaft that can retract into the unit when not in use. That's a nice feature. Could be refined even more but it's still way nicer then what's in the pics in the manual.

An easy access battery door would be nice too.

Oreo,

The tubing length is correct there should be a small amount of resistance to engaging the second magnet this is to preload the sensors.

Once a fan unit is mounted the magnets have a far easier job due to the weight.

Just ordered one of Bob's Balancers.

Friends are already kindly volunteering their edf's for me to 'practice' on.

How kind of them

To fege and you guys who have used the balancer,is the balaced fan sounding more quiet? What exactly is the big difference? Thrust, vibration, noise?

Originally Posted by asficas

To fege and you guys who have used the balancer,is the balaced fan sounding more quiet? What exac

Yes, quieter and more power because less power is used or consumed to overcome the imbalanced rotor.