Reply
 
Thread Tools Search this Thread Display Modes
 
Old 04-16-2019, 05:30 PM   #1
Senior Member
 
LongJohn's Avatar
 
City: Watts Bar Lake, Tn River
Country: USA
Vessel Name: RedBoat
Vessel Model: MS 34T
Join Date: Apr 2013
Posts: 106
Fluxgate Compass

This might be common knowledge - I don't know. But a search doesn't find this discussed so I thought it worth a post.


My RayMarine St8001 AutoSteer course wandered widely, and did not agree with my GPS course. I suspected the fluxgate compass was at fault. "What did I have to lose?" I opened the compass housing to find a coil in a plastic frame mounted in a plastic gimbal. A lead weight hung from the coil to keep the coil level. The coil did not move freely in the gimbal. I used a plastic friendly aerosol solvent to clean the gimbal bearings until freedom of movement was achieved. Reassembled. Post test showed optimum function; 0 degrees average deviation, max error was 3 degrees from GPS. So, before you go buy a new one ....
__________________
Advertisement

__________________
LongJohn
LongJohn is offline   Reply With Quote
Old 04-16-2019, 06:31 PM   #2
Guru
 
boomerang's Avatar
 
City: Kilmarnock VA
Country: united states
Vessel Name: YellowBird MMSI 367769170
Vessel Model: 1978 Mainship m1 #149
Join Date: Apr 2016
Posts: 529
Not sure how a sticking flux sensor gimbal would cause your pilot to have the wandering issue (usually the fine copper windings for one quadrant will break causing the compass to not read for 45° of 360°) & I can't say I've ever seen or heard of one sticking but if it's working, good for you!
__________________

__________________
-Shawn-
boomerang is offline   Reply With Quote
Old 04-16-2019, 08:11 PM   #3
Guru
 
City: Fairport
Country: United States
Join Date: Jan 2017
Posts: 1,508
Good to know. I had no idea some fluxgates even had moving parts!
diver dave is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 10:14 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012