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Post by markus on May 21, 2008 14:25:15 GMT 1
here's my first attempt in barrel elevation: servo mounted in turret base modified turret from hachette elevating mechanism by a piece of 40mm plastic tubing video:
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Post by swanrail on May 21, 2008 23:26:53 GMT 1
Looking good Marcus. I cannot wait to get the wooden turret top and the gun barrels to see how my effort will work. Presume, like me, you had to give up on using another servo to lift the guns, as you were trying earlier? Do you have any idea if the wooden parts will also be brass covered? Best wishes,
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Post by markus on May 22, 2008 11:53:43 GMT 1
hi don ! there's enough space inside the turret for a mini servo, but my radio control ran out of channels so i had to go the mechanical way the turrets will definetly be brass covered, looking forward to those parts markus
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Post by swanrail on May 22, 2008 12:12:16 GMT 1
Thanks Marcus, funny enough, was thinking about the possibility of fitting the servo in the turret head myself last night, but there is a problem in getting the feed wire fed through, which needs to revolve with the head unit. Have been scratching my head of possible solutions for months now, there must be a simple way to get it to work!!! As with my prototype, our solutions lack total control, it would be nice to raise and lower the barrels independantly of the revolution action. One way of feeding the servo is to use slip rings, but my mechanical aptitude is not upto to doing that!!!!
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Post by Mark on May 22, 2008 13:00:07 GMT 1
Just run a wire up the turret and leave enough slack so that it doesn't pull at full travel. I've a 1/16 Sherman tank with rotating turret and elevating gun. There is just a slack wire going into the turret and that works with no problems.
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Post by markus on May 22, 2008 13:57:24 GMT 1
agree with mark - a slack wire will do as you can see, fitting a mini servo will work:
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Post by swanrail on May 22, 2008 22:56:30 GMT 1
It sounds like a good idea, but in my case, there will be every likelihood that the loose wire will eventually jam between the fixed and the revolving parts, which is why I disregarded this as a solution. (my end stop microswitches are fixed ontop, unlike yours which are underneath). Be interesting to see how yours developes, keep us posted!!!!
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