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370SD replacement motors spin backwards reverse direction

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370SD replacement motors spin backwards reverse direction

Old 12-06-2007, 06:00 AM
  #1  
RobBeach
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Default 370SD replacement motors spin backwards reverse direction

370SD brush motors replacement motors spin backwards reverse direction that have
the Walkera sticker on the motors.

These are the ones you see assembled in the pictures with a black "foamish"
background and a small screw near the gear lower left in picture.
And they have the Walkera label.

They spin backwards.
When you look at the battery connections you will see the white wire is
connected to the lead with the red dot, and vice versa for the positive red wire.

You will need to flip these wires around.
AND YOU WILL NEED TO FLIP THE DIODE TOO... if you don't flip
the diode the motor will burn out as soon as the motor gets electricity.

I cut the battery leads close to the motor, I then cleaned up the area with a soldering iron
near where the diode leads connect to the battery, exposing a little more of the diode
leads. I then cut out the diode leaving as much of the leads on the diode as possible.
Holding the diode with a third hand over the motor leads I resoldered it forming a little bridge
to the shorten diode leads with the solder. Then reattached the battery leads in the correct
position, red wire to the red dotted motor post etc etc.
When I did mine... the leads on the cut diode were long enough that I didn't really have to make
a bridge with solder for the slightly shorten leads to the motor posts.
REMEMBER YOU HAVE TO FLIP THE DIODE, just as you switched the battery leads.

If you don't flip the diode...
In addition you will probably burn out your receiver, I went through three today, one caught fire.
Old 12-06-2007, 08:32 PM
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jtspin
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Default RE: 370SD replacement motors spin backwards reverse direction

Rob,

It's not a resistor, it's a diode. If it was a resistor, it wouldn't matter which way it went. But it DEFINITELY matters which way a diode goes. I don't know about all Walkera 4-in-1s, but the one for the 22E has an internal diode so the one on the motor isn't really necessary. It's probably better to not have one at all than to have it installed backwards. The end with stripe on the diode should be connected to the positive terminal of the motor (which may be marked with a '-' if you had to reverse the wires to get the motor to spin the right direction). You should use a voltmeter to verify polarity of the motor terminals before soldering on the diode.

-JT
Old 12-16-2007, 09:56 PM
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dgv
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Default RE: 370SD replacement motors spin backwards reverse direction

Hi
nice pics!!, i would like to know how the motor is conected, it is a red point in one of the 2 connections in the motor, and the black diode conected between them, o lost the connection and i want to make sure is right, of course they are 2 wires one pink and the other white.. txs a lot
Old 12-17-2007, 07:18 PM
  #4  
RobBeach
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Default RE: 370SD replacement motors spin backwards reverse direction

DON'T DO ANYTHING until I or somebody puts up a picture... of the connections...
I'll do one later tonight... or early tomorrow morning..

IF you DO IT WRONG YOU will FRY the RECEIVER... and or lots of other stuff
and maybe catch fire.


EDITED to add link below of picture and thread for motor connections.
LINK:
http://www.rcuniverse.com/forum/m_67...tm.htm#6772307

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