Good news and bad news!

[Mike Palko]

First the good news. I finised my servo tester and it works! I was amazed that it worked the first time. I am planning on making a second. Hopefully it will be a little neater and lighter. I would also like to add an on/off switch to it. The finised weight is about .3-.4oz if i remember right.

The bad news or i think it is bad. The motor i am using is an axi 2820/10. When i plugged the battery, motor, esc, and servo tester together the motor beeps. Why is that? I am going to plug everything into a normal reciever and use the transmitter to control it to see if it still beeps. The motor also gets hot at wide throttle. I was running the motor with no load (for about 30 sec)but it was still hot. I have never owned a brushless motor before so is this normal? By the way i was using 10 cells. Also I am using a geared astro 15 on my twister with a bec system from a glider type setup to control the motor. There is no soft start on the bec so i guess you can guess what happened, the pinion gear on the motor stripped. So right now i have some work to do. I am very excited to see my future setups come together.

[steve lewin]

Congratulations on the servo tester. I like nice simple circuits.

If you just mean that it beeps a couple of times when you connect it up that's normal, particularly for sensorless motors. The beeping is the ESC going through its "arming" sequence, sorting out the motor configuration and confirming that you're ready to go.

Since you've had it running I guess it can't really be the other thing which applies to some ESCs, needing a particular throttle !sequence" to arm, E.g. low at switch on, up to high then back to low. I don't know if your ESC needs anything specific like that anyway.

I'd get a prop on the motor and try it like that. Running it with no load can overrev it and with no "fan" you'll have absolutely no cooling, which both may contribute to it gettin hot. But they do get warm anyway, all that power has to go somewhere.

Steve

[Mike Palko]

I can only get the axi 2820/10 to turn a 10x6 prop at 7,400 rpm on 10 cells. Also when i ran the motor in the basement it seemed to get interferance. Do i need to use any resistors or is that just for brushed motors? Why do you think the motor was turning to slowly? I am going to try to change timing settings with the esc but that seems to be alot of rpm to make up. I'll keep you updated. I am learning SLOWLY so bear with me.

[steve lewin]

I guess you're thinking of capacitors rather than resistors. Caps are only required on brushed motors. They prevent some of the interference caused by sparking at the brushes. No brushes, no sparking ;).

Can't help with the rest I'm afraid, though 7400 does seem low. I'd expect more like 9000. But I don't know of anyone who has tried that particular combination of motor and ESC (you did say it was a Castle Creations Phoenix didn't you ?). Perhaps they don't work well together ?

Steve

[Mike Palko]

Yes the esc is a castle creations pheonix 35. I did mean capacitors not resistors. What would make one esc work better than another for a specific motor? The esc has adjustable timing, and in the directions it says what timing is best for the axi or is there something else to it? Thanks again.

[Mike Palko]

Well i recharged the pack i was using. It has about 10 flights on it so i know it is good (10 cp1700's). I had been using it on the twister and it was fine. I played with all the throttle trims and the best i could get with an apc 10x5 is 8100-8400rpm. I also can not get into the program mode to change the timing. The only thing i can think of is that it is the timing or the esc just doesn't work well with that axi.