Questions and Answers If you have general RC questions or answers discuss it here.

JR servo reversing extension

Reply

Old 02-23-2014, 08:55 AM
  #1  
CESSNA 421
Thread Starter
My Feedback: (17)
 
Join Date: May 2002
Location: St. Charles, MO
Posts: 244
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default JR servo reversing extension

I am needing to reverse one of my standard rotation JR DS8611A servos and someone told me about a servo reversing extension. If I can't obtain one of the extensions I will have to internally reverse the servo electrically. If anyone know of such a product please let me know.

Thanks,

Mike
CESSNA 421 is offline  
Reply With Quote
Old 02-23-2014, 10:12 AM
  #2  
speedracerntrixie
My Feedback: (29)
 
speedracerntrixie's Avatar
 
Join Date: Jun 2010
Location: Sacramento, CA
Posts: 6,842
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Mike, what kind of setup do you have that won't allow you to reverse the servo via TX? All of these reversing extensions I have ever seen mess with the servos centering and the center usually drifts with temp changes.
speedracerntrixie is offline  
Reply With Quote
Old 02-23-2014, 12:30 PM
  #3  
CESSNA 421
Thread Starter
My Feedback: (17)
 
Join Date: May 2002
Location: St. Charles, MO
Posts: 244
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

I am using dual elevator servos and one of them has to rotate opposite of the other. I am using a match box and so a reversing Y is not acceptable. I definitely do not wish to slave another channel so it looks like the only thing I can do is to internally rewire the servo for reverse rotation. JR used to make a DS8611A reversed servo but they are now discontinued.

Thanks,

Mike
CESSNA 421 is offline  
Reply With Quote
Old 02-23-2014, 12:44 PM
  #4  
OldScaleGuy
My Feedback: (1)
 
OldScaleGuy's Avatar
 
Join Date: Dec 2005
Location: Seymour, IN
Posts: 2,855
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

These work fine. http://www.maxxprod.com/mpi/mpi-5.html#Reversers
OldScaleGuy is offline  
Reply With Quote
Old 02-23-2014, 02:07 PM
  #5  
speedracerntrixie
My Feedback: (29)
 
speedracerntrixie's Avatar
 
Join Date: Jun 2010
Location: Sacramento, CA
Posts: 6,842
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Mike, you can reverse one servo through the matchbox.
speedracerntrixie is offline  
Reply With Quote
Old 02-23-2014, 03:15 PM
  #6  
tailskid
My Feedback: (34)
 
tailskid's Avatar
 
Join Date: Nov 2001
Location: Tolleson, AZ
Posts: 9,437
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

I used two MatchBox's on my Slipstream RV-8; one for flaps and the other for elevator servos...needed both and they worked flawlessly.
tailskid is offline  
Reply With Quote
Old 02-23-2014, 08:11 PM
  #7  
CESSNA 421
Thread Starter
My Feedback: (17)
 
Join Date: May 2002
Location: St. Charles, MO
Posts: 244
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

According to Horizon Hobby my JR match boxes do not have reversing capabilities as does the Futaba match boxes.

Mike
CESSNA 421 is offline  
Reply With Quote
Old 02-23-2014, 08:22 PM
  #8  
speedracerntrixie
My Feedback: (29)
 
speedracerntrixie's Avatar
 
Join Date: Jun 2010
Location: Sacramento, CA
Posts: 6,842
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Mike unless they changed the Matchboxes the Horizon CSR you spoke with is wrong. Check the instructions under functions. You can set the rotary dial to settings 5 through 8 and use the inc/ de buttons to reverse the servo.
speedracerntrixie is offline  
Reply With Quote
Old 02-24-2014, 03:09 AM
  #9  
CESSNA 421
Thread Starter
My Feedback: (17)
 
Join Date: May 2002
Location: St. Charles, MO
Posts: 244
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Thanks, I will check it out.

Mike
CESSNA 421 is offline  
Reply With Quote
Old 02-24-2014, 06:42 AM
  #10  
airega1
My Feedback: (204)
 
airega1's Avatar
 
Join Date: Jan 2002
Location: Va Beach, VA
Posts: 1,175
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

matchboxes WILL reverse a servo
Originally Posted by CESSNA 421 View Post
Thanks, I will check it out.

Mike
airega1 is offline  
Reply With Quote
Old 02-24-2014, 07:00 AM
  #11  
BarracudaHockey
My Feedback: (11)
 
BarracudaHockey's Avatar
 
Join Date: Jul 2003
Location: Jacksonville, FL
Posts: 23,386
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Matchboxes will reverse a servo. That's exactly the case they are for, setting up dual elevators where you need to reverse one servo and match throws or the like.

Spektrum/JR recommends AGAINST using any kind of reversing or amplified Y or extension with the DSM based 2.4 systems as well
BarracudaHockey is online now  
Reply With Quote
Old 02-24-2014, 10:30 AM
  #12  
bafflerback
My Feedback: (6)
 
Join Date: Aug 2005
Location: Willingboro, NJ
Posts: 61
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

What kind of transmitter are you using? Both my DX-8 and 9303 allow me to configure duel elevator servos in the transmitter and then I have no need for a matchbox. You set both channels up separate and they work off the elevator stick. Do not just mix 2 channel or you'll lose the trim function on one channel.
bafflerback is offline  
Reply With Quote
Old 02-24-2014, 12:47 PM
  #13  
Tony Iannucelli
My Feedback: (193)
 
Join Date: Feb 2002
Location: Parrish, FL
Posts: 445
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

You might be able to "mate" the servos in the transmitter depending on your setup. Mixing sometimes does not allow dual trim. Mating does. Hope you figure it out. Some of this stuff is vexing.
Tony Iannucelli is offline  
Reply With Quote
Old 02-24-2014, 01:00 PM
  #14  
flycatch
Senior Member
My Feedback: (26)
 
Join Date: Jul 2002
Location: Barstow, CA
Posts: 2,002
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Simple solution if you have the skills' and tools is to reverse the leads directly on the servo motor.

Last edited by flycatch; 02-24-2014 at 01:01 PM. Reason: Spelling
flycatch is offline  
Reply With Quote
Old 02-24-2014, 01:30 PM
  #15  
speedracerntrixie
My Feedback: (29)
 
speedracerntrixie's Avatar
 
Join Date: Jun 2010
Location: Sacramento, CA
Posts: 6,842
Gallery
My Gallery
Models
My Models
Ratings
My Feedback
Default

Originally Posted by flycatch View Post
Simple solution if you have the skills' and tools is to reverse the leads directly on the servo motor.
I believe the 8611a servo has the motor surface mounted onto the PCB making this impossible.
speedracerntrixie is offline  
Reply With Quote

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service