Go Back   oOple.com Forums > General > Electrics

Reply
 
Thread Tools Display Modes
  #1  
Old 28-06-2018
Cliveyp Cliveyp is offline
Member
 
Join Date: May 2013
Posts: 123
Default Twitching KO RSX One10

I’ve recently picked up a used KO RSX One10 servo for my TC. On bolting it in tonight I noticed it has a shake.....nothing major, it’s pretty much all taken up in the general slack of the steering joints, but it’s still there. It also seems to still be there if I add a bit of lock too - although does initially calm down when you first hit lock - but if you hold a steady amount of lock it twitches.

I’m running a HW XR10 Pro, so I’ve tried swapping to 7.4V BEC but this changes nothing.

Any one experienced this before? Any ideas what might solve it?
__________________
TC - Serpent S411 ERYX3.0, Xray T4 2015
GT10 - CRC
Vintage Projects - TC3 FT, Yokomo Works, Procat, Fireblade
Reply With Quote
  #2  
Old 29-06-2018
tyreman's Avatar
tyreman tyreman is offline
Mad Member
 
Join Date: Dec 2005
Location: Leamington Spa
Posts: 1,919
Default

Quote:
Originally Posted by Cliveyp View Post
I’ve recently picked up a used KO RSX One10 servo for my TC. On bolting it in tonight I noticed it has a shake.....nothing major, it’s pretty much all taken up in the general slack of the steering joints, but it’s still there. It also seems to still be there if I add a bit of lock too - although does initially calm down when you first hit lock - but if you hold a steady amount of lock it twitches.

I’m running a HW XR10 Pro, so I’ve tried swapping to 7.4V BEC but this changes nothing.

Any one experienced this before? Any ideas what might solve it?

It states on the side of the box that this is normal. Nothing to do with the rest of your electrics.
__________________
TLR, Screwz4RC, Spektrum, Horizon Hobby,
Trinity, Trishbits, Racer, RichPaint, RDT products,
Sanwa, Zen Racing, Silverback Lipo's

http://www.screwz4rc.co.uk

Reply With Quote
  #3  
Old 29-06-2018
Cliveyp Cliveyp is offline
Member
 
Join Date: May 2013
Posts: 123
Default

Quote:
Originally Posted by tyreman View Post
It states on the side of the box that this is normal. Nothing to do with the rest of your electrics.

Unfortunately I don't have the box.....what does it actually say?
__________________
TC - Serpent S411 ERYX3.0, Xray T4 2015
GT10 - CRC
Vintage Projects - TC3 FT, Yokomo Works, Procat, Fireblade
Reply With Quote
  #4  
Old 29-06-2018
mark christopher's Avatar
mark christopher mark christopher is offline
Spends too long on oOple ...
 
Join Date: Jan 2007
Location: haxey, doncaster
Posts: 7,787
Send a message via MSN to mark christopher
Default

It's normal
__________________
MBModels - Schumacher Racing - Vapextech.co.uk - MRT - Savox - SMD
Reply With Quote
  #5  
Old 03-07-2018
ianjoyner ianjoyner is offline
Senior Member
 
Join Date: Jun 2008
Posts: 418
Default

If you have the model selector you can also put it in mild mode, it’s still fast but smooths it out and reduces twitching at centre.

http://www.racing-cars.com/pp/Produc...t/KO61029.html
Reply With Quote
  #6  
Old 05-07-2018
Cliveyp Cliveyp is offline
Member
 
Join Date: May 2013
Posts: 123
Default

Thanks all. I'll give it a whirl as it is and see if the twitch actually worries me when driving. Judging by the comments of it being 'normal', i'm presuming it wouldn't.

I still find it quite amazing that KO have produced a servo that twitches 'as standard'......quite phenomenal!
__________________
TC - Serpent S411 ERYX3.0, Xray T4 2015
GT10 - CRC
Vintage Projects - TC3 FT, Yokomo Works, Procat, Fireblade
Reply With Quote
  #7  
Old 06-07-2018
MattW's Avatar
MattW MattW is offline
Mad Member
 
Join Date: Jan 2006
Location: Cambridgeshire
Posts: 1,396
Send a message via MSN to MattW
Default

Sanwa had one as well that did the same. I ran them for a while and never noticed. The issue is servo / pot (or encoder) hunting. It's very common in industrial servo systems (CNC machines etc) where by the servo doesn't ever manage to hit true "zero" when not loaded.

For example it's +0.001 when it's aim is 0.000. It tries to move to 0.000, but instead over shoots and ends at -0.001, so then it tries again to get to 0, guess what, over shoots and is back at +0.001 again! It keeps doing this and hunting around the centre point.
__________________
Matthew White
Reply With Quote
  #8  
Old 09-07-2018
AmiSMB AmiSMB is offline
Mad Member
 
Join Date: Oct 2007
Location: Bracklesham Bay, West Sussex
Posts: 1,375
Default

I have found that sometimes soft mounting them helps as it this can be because it hits a resonant frequency of the servo that is altering the pot signal hence the shakes.
__________________
Schumacher KC, KD, CAT XLS, CAT L1 | Team C TM2 V2, TM4, TC02 | JQ The Car | Mugen MBX6 | Losi 8T,8BE 1.5 | Durango DEX-410V4 | FTX Blaze | XRAY M18T | Kyosho STR,Surf Dude,Nexus 30 | Nimrif Makara | MFA Spear | She Devil | T-Rex 450SEV2,250SE | Ark X-400 | Protech Butterfly,Zoom 400 | Ikarus Piccolo | VW T4 | Smart 450 | KC-250 | BoltRC Kraken 5" | Emax Nighthawk 250 | Gravity 250 | S550 | Prusa i3 | TronXY X5A | Must stop collecting stuff!
Reply With Quote
Reply

Thread Tools
Display Modes

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

Forum Jump


All times are GMT. The time now is 02:59 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
oOple.com