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Post by eric on Aug 12, 2008 10:41:17 GMT 1
The confusion there is about what is acually rotating!
The radar only rotated insofar as it was attached to the optical rangefinders that rotated to seek enemy targets. the radar could only look where the rangefinders were pointing.
They did not whirl round in 360 degree circles like todays radar.
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Deleted
Deleted Member
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Post by Deleted on Aug 12, 2008 10:42:58 GMT 1
Pity there is no film of them in motion.
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Post by markus on Aug 12, 2008 11:12:43 GMT 1
Hi Marcus,
Just starting to assemble the radio gear to make the turrets rotate, (but probably not elevate), I take it that Anton, Bruno, Caesar and Dora are all about 55mm across the base.... for robustness and cost, I'm thinking of fitting standard sis servos (Futaba 3003) will these fit OK?
Also for control of the turret servos, I'm looking at installing a "servo slow" and one of these instead of modifying the servos:
180° Servo Stretcher www.servocity.com/html/180o_servo_stretcher.html
Regards, Martin
hi martin ! standard servos are a bit too large, especially for turret dora (rudder servo or rudder linkage are located there). so don and i went for mini servos if you intend to use slowing modules note that each servo needs its own module - attaching several servos to a single module doesn't work in most cases markus
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Post by Model Boat Mayhem on Aug 12, 2008 11:25:02 GMT 1
Hi Marc. What model / size servos are you using?
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Post by markus on Aug 12, 2008 11:46:31 GMT 1
i used carson mini servos, approx. size 23x13x23mm...
markus
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Post by rem2007 on Aug 12, 2008 16:50:36 GMT 1
where do you get them markus and how much
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Post by markus on Aug 12, 2008 19:56:10 GMT 1
got mine from a model shop near cologne for 6,95 euros (~5 GBP) each...
markus
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Post by swanrail on Aug 12, 2008 23:47:14 GMT 1
My mini-servos came from: www.servoshop.co.uk they were 4 off for £29, and are 12mm by 23mm by 26mm. No problem with turret Dora providing the steering servo is set well aft and the mini servo is athwartships. (see my pictures under "Turret Dora" in my section of the forum).
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Post by Mark on Jan 7, 2009 13:37:56 GMT 1
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Post by Mark on Jan 7, 2009 13:40:36 GMT 1
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Post by Mark on Jan 7, 2009 13:59:02 GMT 1
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Post by markus on Jan 7, 2009 16:56:02 GMT 1
However, I'm thinking that if you dismantle a servo, and replace the pot with one of approx 1/3 the value, and remove the end stops, you should be able to achieve a 270 degree travel. I may have a play and let you folks know what happens. Any thoughts Markus ? don't think that a pot with a smaller value will work as the servo electronics only analyzes the ratio of the potentiometers' resistances, not the resistances itself. (some years ago i replaced a 5k pot with a 10k one to achieve more rotating angle - without success ) here's my solution for servo stretching: 2 small potentiometers (5k ohms) wired in line with the built-in potentiometer, glued onto the bottom now the left/right rotation angle can be adjusted indenpendent from each other, also the center positon can be adjusted properly. max. angle is approx. 200 degrees with notch inside, removing that notch allows up to 270 degrees. will use these servos for the main guns. time for a complete turn (270 degrees) can be set up to 10 seconds using the bigger slowing module (pic somewhere on this forum ) if anyone wants a wiring diagram - i'm sure robert (v2.0) is willing to help
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Post by Robert on Jan 7, 2009 18:54:03 GMT 1
Sure Markus, I'd love to update your diagram and even our previous drawings!
You know it always makes me feel happy to help! ;D
Tschüss, Robert
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Post by Mark on Jan 7, 2009 19:50:35 GMT 1
Ah, that makes sense - thanks Markus, saved me wasting my time !! Have a K
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