Squeaky Scorpion
03-21-2012 | 02:57 PM
#1
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From: glasgowScotland, UNITED KINGDOM
Squeaky Scorpion
I have just moved my Scorpion 4025-10 / Scorpion Commander 90amp ESC into a new model. Last week everrthing was running fine but today I went through the ESC / Transmitter programme to set the throttle limits and I could not get the motor to run. I get the flashing diode but not the two beeps described with the stick at full throttle, I then move the stick to shut throttle within the prescribed 10 seconds. When I advance the stick I now get a rattle from the motor and the prop moves jerkily. I have tried re-programming everything and tried a different receiver, nothing seems to work. I then moved the ESC to a different model with a Scorpion 4025-16 and it works just fine!!
It seems like a motor problem to me, any ideas guys?
John
It seems like a motor problem to me, any ideas guys?
John
03-21-2012 | 03:49 PM
#2
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RE: Squeaky Scorpion
John, as I understand it, were the throttle endpoint numbers on your tx the same on both set-ups? I'm assuming you used the same tx and realize you are talking about trying the same esc on two different models/motors. Just a thought, Everette
03-22-2012 | 09:06 AM
#3
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From: glasgowScotland, UNITED KINGDOM
RE: Squeaky Scorpion
Everette
Things have moved on! Having tried the suspect ESC on another motor and finding it to work ok I tried the reverse and connected up a Jeti 99 spin to the suspect motor, much to my surprise this also worked ok. So I have a motor that works with one ESC and an ESC that works with the other motor, they just don't work together. I decided to give the suspect combo one more try and again to my surprise it worked! I am not aware of doing anything different other than connecting up with the throttle at shut down ( the ESC has a BEC) previously I had been connecting up with the throttle at full to set the end points. Will see how it works at the field.
John
Things have moved on! Having tried the suspect ESC on another motor and finding it to work ok I tried the reverse and connected up a Jeti 99 spin to the suspect motor, much to my surprise this also worked ok. So I have a motor that works with one ESC and an ESC that works with the other motor, they just don't work together. I decided to give the suspect combo one more try and again to my surprise it worked! I am not aware of doing anything different other than connecting up with the throttle at shut down ( the ESC has a BEC) previously I had been connecting up with the throttle at full to set the end points. Will see how it works at the field.
John
03-22-2012 | 03:13 PM
#4
RE: Squeaky Scorpion
Maybe a dodgey connector between the esc and motor?
A bit of oxidisation forms on the bits that don't touch, pull the connectors apart and put them back together and by pure chance you could have had one connector with an oxide layer providing some resistance. Excercise the connectors a few times (swapping motors and esc's) and oxide layer is now worn off and gone, along with the problem.
Just speculation...
A bit of oxidisation forms on the bits that don't touch, pull the connectors apart and put them back together and by pure chance you could have had one connector with an oxide layer providing some resistance. Excercise the connectors a few times (swapping motors and esc's) and oxide layer is now worn off and gone, along with the problem.
Just speculation...
