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Treasure Hunting & Metal Detecting Forum Message Boards - Detector Hunter Whites Minelab Tesoro XP > Tech Talk > Modifications, Do It Yourself & Repairs (Moderators: Eugene52, xavier, GoldDigger1950) >

How to build an electric tow cable winch?

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Christian Topic starter

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	How to build an electric tow cable winch? « on: February 08, 2009, 12:55:11 pm »

I would like to build an electric winch for my side scan sonar cable similar to this one:

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http://www.sea-viewdiving.com/diving_equipment/sonar/imagenex/containeredreels.htm

I wonder what parts are needed?

Could an electric winch as on a jeep / car be used to start with?

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Christian

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oRo

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	Re: How to build an electric tow cable winch? « Reply #1 on: February 08, 2009, 01:15:05 pm »

I think it would work alright. You would have to make a larger spool for the cable though as most only have short cable lengths. Old fishing boats would use automotive starter motors to power their fishing line reels, these worked pretty good and could reel in a large fish in no time.

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Cornelius

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	Re: How to build an electric tow cable winch? « Reply #2 on: February 08, 2009, 01:18:11 pm »

A winch like you may find on a four wheel drive car , or a Jeep will do the same thing as this expensive special unit . If you are a little handy with tools you can even build one out of a starter motor . Cornelius

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	Re: How to build an electric tow cable winch? « Reply #3 on: February 08, 2009, 02:00:39 pm »

Thank you very much! I will give it a try then! What tool could be used for measuring the cable flow? That is how much cable has been rolled off the winch?

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Christian

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	Re: How to build an electric tow cable winch? « Reply #4 on: February 08, 2009, 02:09:20 pm »

Christian . It is not important how much cable has been woud off the winch . It is important to know the depth your tow-fish is in . The speed of the boat will change the angle of the cable to the tow-fish so you never know at what bepth your tow fish is . Unless the cable is straight down , and that will never happen . There are different ways to know the depth of the fish . Coprnelius

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	Re: How to build an electric tow cable winch? « Reply #5 on: February 08, 2009, 02:19:06 pm »

There are 12 volt motor control circuits posted all over the internet . Beside starter motors , Anchor pulling motors are very powerfull . If you build it yourself , you will save several hundred dollars . All that is needed would be some relays, switches and a circuit breaker ,A decent motor and reel to hold several hundred feet of cable .......I will post more stuff later on.........................Eugene52

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	Re: How to build an electric tow cable winch? « Reply #6 on: February 08, 2009, 02:59:15 pm »

For the cable flow if you just want to know how much cable has gone out: The simplest I have seen is cable that is marked every so many units, say 10 meters, then just count the marks out. You could put a magnet on your cable reel and use a magnetic reed switch to keep count. There are also mechanical counters that could be activated by the reel movement also. I have only pulled a fish a few times. It had adjustable fins that set the dive depth at certain boat speeds, just like a large fishing lure. (story) The last use of one of these I pulled the unit with a diver on a cable with dive board at a lower depth at the same time. We ran through an area that was shark infested. We in the boat saw a steady stream of sharks moving out of the divers way. It freaked me out, but the diver did not mind at all and never signaled to surface. Huh?

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	Re: How to build an electric tow cable winch? « Reply #7 on: February 08, 2009, 03:20:43 pm »

ORO . As I mentioned it is not important to know how many feet is reeled off the cable spool . You want to know how deep the fish is . Say you put 30 meters of cable in the water . The only way to know how deep you are is measuring the angle of the cable ( say 60 degrees X 30 meters = 15 meters of depth ) . To get to the right angle you have to play with the speed of the boat ( after setting the fins on your fish at a certain angle ) . Even trying to measure with magnets is a nono since the diameter of the wound up cable is not constant all the time ( if you reel out the cable the diameter changes so not every revolution will reel out the same length of cable ) .This is a simple project but you have to keep on thinking about what you are doing . Keep on posting and let us know what you think about this project . Regards Cornelius

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	Re: How to build an electric tow cable winch? « Reply #8 on: February 08, 2009, 05:15:19 pm »

The cable size and drum diameter does not matter as the counter is counting revolutions. All you need to know is how many revolutions it takes to reel out whatever feet of cable you need. You have this determined before hand by measuring the cable and recording how many clicks it took to reel it out. Say you want to have a 10 foot cable control. You just roll out the cable 10 feet at a time and count how many clicks it took, this is recorded. When you go to sea to use it you just run the cable out to the number of clicks you need for the length you want out. This same thing is done for soundings &c by knotting a rope every so many units and then counting the knots as the rope is let out. In the case of the counter the winch is the person letting the rope out and the clicks are the knots. Simple low tech way to control how much cable is going out.

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	Re: How to build an electric tow cable winch? « Reply #9 on: February 08, 2009, 05:20:52 pm »

Then let me ask this . If you let out 20 meters of cable , how deep is your tow-fish ? Cornelius

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