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dogon dory
Joined: 10 Jun 2004 Posts: 1321
State or Province: AK
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: DogOnDory
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Posted: Sun May 08, 2005 2:32 am Post subject: Deviant compass |
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Sorry, Folks - Post Deleted By Author
Last edited by dogon dory on Sat Mar 01, 2008 5:42 pm; edited 1 time in total |
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UncleRichie
Joined: 02 Nov 2003 Posts: 155 City/Region: Bainbridge Is.
State or Province: WA
C-Dory Year: 2000
C-Dory Model: 22 Cruiser
Vessel Name: C-Critter
Photos: C-Critter
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Posted: Sun May 08, 2005 3:09 am Post subject: |
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Hi,
I had the same problem ,the windshield wiper motor is on the botom of the windshield right in front of the compass . I turned the motor over so the magnets are farther away from the compass and moved the compass sideways by making a small mount out of oak and moving the compass over one hole its still close to center of the steering wheel so as to be easly read.
Richard |
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Sea Wolf
Joined: 01 Nov 2003 Posts: 8650 City/Region: Redding
State or Province: CA
C-Dory Year: 1987
C-Dory Model: 22 Cruiser
Vessel Name: Sea Wolf
Photos: Sea Wolf
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Posted: Sun May 08, 2005 5:05 am Post subject: |
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Dan-
Sounds like Uncle Ritchie has BTDT. My first reaction was to suggest you make a mount out of large diameter white PVC pipe to raise it up above the motor's immediate magnetic field. You might try this raised position if his solution doesn 't work in your case. Good Luck! Joe. _________________ Sea Wolf, C-Brat #31
Lake Shasta, California
"Most of my money I spent on boats and women. The rest I squandered'. " -Annonymous |
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Bob Cat
Joined: 28 Dec 2004 Posts: 262 City/Region: Santa Monica
State or Province: CA
C-Dory Year: 2006
C-Dory Model: 255 Tomcat
Vessel Name: Dive Cat
Photos: Dive Cat
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Posted: Sun May 08, 2005 8:57 am Post subject: |
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Dan-
We had a problem that developed after some work had been done but had gone unnoticed until we started to practice some old time/distance/speed exercises. It was as much as 20degrees off. We couldn't find the offending magnetic field, so we swung the compass using the GPS and brought it back nearer to reality. Now we verify the deviation table every 3 months.
Scaley |
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Chuck S
Joined: 01 Nov 2003 Posts: 309 City/Region: Cleveland
State or Province: OH
C-Dory Year: 2003
C-Dory Model: 16 Cruiser
Vessel Name: Amelia Anne
Photos: Amelia Anne
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Posted: Sun May 08, 2005 9:11 am Post subject: |
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I mounted our compass as far forward as I could get it to keep it away from electrical magnetic fields. Not a problem for us as we're used to sailboat compases mounted on the aft end of cabin, quite a distance from the tiller.
Compass needs to be checked for deviation with all your electrical devices running. Switch them on one at a time and note which, if any, cause movement. If more than one causes movement you'll need to record both sets of data. Windshield wiper motors on our 16 Cruiser are at the top of the window.
-- Chuck |
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Guts
Joined: 06 May 2005 Posts: 18 City/Region: San Diego
State or Province: CA
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Sneaks
Joined: 06 Jun 2004 Posts: 2020 City/Region: San Diego (Encinitas)
State or Province: CA
C-Dory Year: 1993
C-Dory Model: 16 Angler
Vessel Name: C-Brat
Photos: Jenny B and C-Brat
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Posted: Sun May 08, 2005 10:08 am Post subject: |
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I wanted my chart plotter directly in front of the wheel since that's my primary navigation tool. Kinda experimented with locations and came up with what was best for me. As you can see, it's closer to where I would stand and run the boat, yet close enough to glance over and see that all is well with my chartplotter course while relaxing in the chair . Slight deviation adjustment needed there. I even chose to double-stick tape mount it in case that spot didn't work out. It's almost over the cabin wire loom so drilling a small hole for the compass light wiring wasn't traumatic. _________________ Mary & Don Anderson
Brat #483
"Jenny B" 2005 C-22/F75 sold, Oct. 2008
"C-Brat" 1993 C-16 angler/50 hp |
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Sea Wolf
Joined: 01 Nov 2003 Posts: 8650 City/Region: Redding
State or Province: CA
C-Dory Year: 1987
C-Dory Model: 22 Cruiser
Vessel Name: Sea Wolf
Photos: Sea Wolf
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Posted: Sun May 08, 2005 10:12 am Post subject: |
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Dan-
Lots of good suggestions!
Another option might be to return the conventional compass to the source and buy a flux-gate electronic compass instead that has a remotely mounted sensor that could be placed away from the offending electronics, but with the display right where you want it. Joe. |
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CAVU
Joined: 02 Nov 2003 Posts: 665 City/Region: Spokane
State or Province: WA
C-Dory Year: 2002
C-Dory Model: 22 Cruiser
Vessel Name: CAVU
Photos: CAVU
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Posted: Sun May 08, 2005 2:39 pm Post subject: |
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Dan,
I have the same problem and I am planning on moving the windshield wiper to the upper right corner. I think the geometry would be exactly the same on the sweep angle etc. Only drawback would be patching the hole-may be able to fill it with a SS bolt/washer combo that wouldn't look too bad. Food for thought. _________________ Ken Trease
22 CD Cruiser, CAVU
Twin 40HP Hondas |
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dogon dory
Joined: 10 Jun 2004 Posts: 1321
State or Province: AK
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: DogOnDory
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Posted: Sun May 08, 2005 8:27 pm Post subject: |
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Sorry, Folks - Post Deleted By Author
Last edited by dogon dory on Sat Mar 01, 2008 5:43 pm; edited 1 time in total |
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C-WEED
Joined: 14 Mar 2004 Posts: 338 City/Region: New Brockton
State or Province: AL
C-Dory Year: 2000
C-Dory Model: 22 Cruiser
Vessel Name: C-Weed
Photos: C-WEED
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Posted: Sun May 08, 2005 11:25 pm Post subject: |
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Dan, would it be possible to make a magnetic shield? Perhaps a small box out of wood that covers the wiper motor might do the trick. _________________ Chris |
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rogerbum
Joined: 21 Nov 2004 Posts: 5922 City/Region: Kenmore
State or Province: WA
C-Dory Year: 2008
C-Dory Model: 255 Tomcat
Vessel Name: Meant to be
Photos: SeaDNA
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Posted: Mon May 09, 2005 12:25 am Post subject: |
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C-WEED wrote: | Dan, would it be possible to make a magnetic shield? Perhaps a small box out of wood that covers the wiper motor might do the trick. |
Wood won't make a good magnetic shield as the magnetic field will pass right through it. There is a material called mu-metal that makes a good magnetic shield. Can be very expensive though unless you can find it surplus.
Also if the compass is truly "deviant", keep it away from children ...
Roger on the SeaDNA _________________ Roger on Meant to be |
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dogon dory
Joined: 10 Jun 2004 Posts: 1321
State or Province: AK
C-Dory Year: 2005
C-Dory Model: 22 Cruiser
Vessel Name: DogOnDory
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Posted: Mon May 09, 2005 12:58 am Post subject: |
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Sorry, Folks - Post Deleted By Author
Last edited by dogon dory on Sat Mar 01, 2008 5:43 pm; edited 1 time in total |
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