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What is the default cut-off voltage for e-flite 60amp esc??

Old 02-11-2011, 04:25 AM
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Flysohigh
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Default What is the default cut-off voltage for e-flite 60amp esc??

How can I find the automatic cut-off default voltage for the eflite 60amp esc?
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Old 02-11-2011, 06:39 AM
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Originally Posted by Flysohigh View Post
How can I find the automatic cut-off default voltage for the eflite 60amp esc?
Unless it's published, that's kind of hard to do. I've done it many times with my home built 25 volt, 25 Amp power supply. It works, but its 15 years old now. So, I've ordered a power supply from www.mpja.com that is rated for 24 volts DC at 25 Amps. This supply is unusual in that it's output can be varied. This would do what you require, but those things are danged expensive, like $116.00 plus shipping.

http://www.mpja.com/prodinfo.asp?number=18404+PS As of this date, they have 20 of them left.

Just connect your ESC to the power supply, and dial down the voltage til the ESC cuts power to the motor.
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Old 02-11-2011, 07:54 AM
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Originally Posted by Flysohigh View Post
How can I find the automatic cut-off default voltage for the eflite 60amp esc?
If you are asking what the default LVC value is, then it is 70%. This is dangerous though as it calculates the LVC from 70% of the startup voltage, so you need to be mindful when using partial charged packs. It is suggested to change the LVC to match the number of cells of the lipo connected.

http://www.e-fliterc.com/ProdInfo/Fi...CInstSheet.pdf

Bottom of column 1 page 2 will show you the default values, and bottom of column 2 page 2 will show you how to change it. Midway of column 3 page 2 will explain the 70% cutoff more in depth than I did.

Last edited by JBoyd; 02-11-2011 at 04:33 PM.
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Old 02-11-2011, 04:13 PM
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Originally Posted by JBoyd View Post
If you are asking what the default LVC value is, then it is 70%. This is dangerous though as it calculates the LVC from 70% of the startup voltage, so you need to be mindful when using partial charged packs. It is suggested to change the to match the number of cells of the lipo connected.
+1

Agree you should program the 60amp to cutoff for the cell count you are using since the initial voltage measure and 70% is too low for good cells.

They have a nifty RS-232 program device or you can use the Tx stick method.

Mike
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Old 02-11-2011, 04:35 PM
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Originally Posted by rcers View Post
They have a nifty RS-232 program device or you can use the Tx stick method.
The RS-232 programming kit is great, but it is for a serial connection. Not many computers these days have a serial port any more so one would need to buy a $30 Serial to USB connector. Thats the only drawback to the RS-232 that I can see though.
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Old 02-11-2011, 04:40 PM
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Originally Posted by JBoyd View Post
The RS-232 programming kit is great, but it is for a serial connection. Not many computers these days have a serial port any more so one would need to buy a $30 Serial to USB connector. Thats the only drawback to the RS-232 that I can see though.
That is what Ebay is for....

http://cgi.ebay.com/B-USB-2-0-SERIAL...item255fefdbe8

$3.49 shipped.
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Old 02-11-2011, 04:43 PM
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Oh sweet lol gonna have to get me one of those
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Old 02-11-2011, 04:50 PM
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I have not used any of the super cheap ones, since I still use mine on an old desktop.

But...I suspect they work OK for very light use we intend.
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Old 02-11-2011, 05:42 PM
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Originally Posted by JBoyd View Post
If you are asking what the default LVC value is, then it is 70%. This is dangerous though as it calculates the LVC from 70% of the startup voltage, so you need to be mindful when using partial charged packs. It is suggested to change the LVC to match the number of cells of the lipo connected. .
Good point. I've set up my Castle Creations LVC value to a fixed voltage, around 2.7 Volts per cell on my A123 battery packs. But, I NEVER fly until it hits LVC. I land when about 60% of the battery is discharged.

And, running these A123 to 70% of peak voltage would not be a good idea on A123 cells, because the voltage discharge curve on these cells is so flat.
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