reversing a servo  
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reversing a servo - 4/3/2008 3:32:36 AM   
pthomas1956


 

Posts: 5
Joined: 7/14/2007
From: , MO, USA
Status: offline 		hey guys i need help..... how do i reverse a jr 537 servo ??
       Post #: 1

RE: reversing a servo - 4/3/2008 4:31:06 AM   
vicman



Posts: 6209
Joined: 12/8/2002
From: Valdese, NC, USA
Status: offline 		You should be able to do it with your transmiter.
What kind do you have?


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RE: reversing a servo - 4/3/2008 4:32:14 AM   
PilotFighter



Posts: 2019
Joined: 10/9/2002
From: Houston, TX, USA
Status: online 		Most modern radios have servo reverse switch selections on the transmitter. Long ago, when most radios didn't have that feature. It was posible to open the servo up and reverse the wires on the pot, as its called, or potentiometer. But I'm not certain thats even possible on the modern servos.

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RE: reversing a servo - 4/3/2008 4:43:15 AM   
Dorsal


 

Posts: 248
Joined: 4/21/2005
From: Tracy, CA, USA
Status: offline 		I believe you'd need to reverse both the potentiometer and the servo motor.

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RE: reversing a servo - 4/3/2008 10:37:03 AM   
The Ghost



Posts: 873
Joined: 3/18/2004
From: UlladullaNSW, AUSTRALIA
Status: offline 		You need to swap the motor wires(Black/Yellow) and you also need to swap the pot wires (Brown/Blue) or just buy a Hiteck Servo as they are reverse or JR.
quote:

But I'm not certain thats even possible on the modern servos

On most of the lower end servos you can , but the higher end (Digital) and coreless servos it is not as they are soldered directly to the board.

Cheers

< Message edited by The Ghost -- 4/3/2008 10:41:30 AM >

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RE: reversing a servo - 4/3/2008 11:57:38 AM   
Dr1Driver



Posts: 3589
Joined: 7/25/2002
From: Spartanburg, SC, USA
Status: offline 		In the "old days" servo motors and pots were loose-wired. The servo could be easily reversed by swapping the motor wires and the outer pot wires. Now, most are hard wired to the PC board and are VERY difficult to reverse. I'd buy a commercial servo reverser or do it with the TX.

Dr.1

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RE: reversing a servo - 4/3/2008 11:57:39 AM   
vicman



Posts: 6209
Joined: 12/8/2002
From: Valdese, NC, USA
Status: offline 		doing it with the TX is a million times easier


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RE: reversing a servo - 4/3/2008 2:15:00 PM   
Acs_guitars



Posts: 2055
Joined: 2/22/2004
From: Tulsa, OK, USA
Status: offline 		Depending on the purpose and linkage to the servo, you can simply move the linkage to the other side.... Also as others have said, the TX should have a reversing switch. If this is 2 servos on a Y and 1 needs reversed, get a servo seversing Y-harness and be done with it.

< Message edited by Acs_guitars -- 4/3/2008 2:17:59 PM >

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RE: reversing a servo - 4/3/2008 3:22:41 PM   
Deadeye



Posts: 3692
Joined: 7/16/2002
From: Conrad, MT, USA
Status: online 		Doesn't JR sell all there servos with a reverse option? Ie: JR 537r servo.

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RE: reversing a servo - 4/4/2008 4:08:42 AM   
sscherin



Posts: 938
Joined: 8/17/2005
From: Castle Rock, CO, USA
Status: offline 		Hitech Digitals can bee programed to run reversed.
All it takes is a $150 programmer

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RE: reversing a servo - 4/4/2008 1:19:49 PM   
mikegordon10


 

Posts: 200
Joined: 7/12/2003
From: Provo, UT, USA
Status: offline 		If ya just need to reverse the direction and don't wanna or can't use the transmitter then just substitute a JR Servo for a Fubar or vissee versee. Pretty simple really.

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RE: reversing a servo - 4/4/2008 11:49:05 PM   
cyclops2


 

Posts: 1834
Joined: 12/23/2005
From: Frenchtown, NJ, USA
Status: offline
If you want the existing pushrod to stay straight. Mount the servo upside down or even sideways. No harm. Works everytime.

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RE: reversing a servo - 4/8/2008 1:54:42 AM   
victorzamora


 

Posts: 598
Joined: 10/16/2006
From: Mt. Airy, NC, USA
Status: offline 		Ha! I didn't know Futaba and JR servos rotated in opposite directions! Learn something new every day!!

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RE: reversing a servo - 4/8/2008 4:18:10 AM   
mikegordon10


 

Posts: 200
Joined: 7/12/2003
From: Provo, UT, USA
Status: offline 		I'm not 100% sure but I think it has to do with positive/negative shift thing.

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RE: reversing a servo - 4/8/2008 2:46:27 PM   
Rodney



Posts: 4781
Joined: 12/8/2001
From: FL
Status: offline 		Servo direction has nothing to do with shift, simply a matter or the way the motor and feedback pot are connected inside the servo. Futaba and Hitec also rotate the opposite directions with the same change in pulsewidth.

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       Post #: 15

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