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Posts Made By:
Fred
Forum:
TTTT
09-20-2007, 02:36 AM
Replies:
19
Linear servos?
Views:
9,230
Posted By
Fred
Hello Prasanna, you are certainly right....
Hello Prasanna,
you are certainly right. Here are some commercial servos (top 3 on this page) where linear pots were used in micro servos:
http://www.wes-technik.de/English/light_ng.htm
...
Forum:
TTTT
09-19-2007, 12:14 PM
Replies:
19
Linear servos?
Views:
9,230
Posted By
Fred
Hi Edblad, servos with switch type Hall...
Hi Edblad,
servos with switch type Hall sensors (the ones that can be used to count each shaft rotation) are tricky in terms of centering, unless you store the absolute position (as it relates to...
Forum:
TTTT
09-19-2007, 04:14 AM
Replies:
19
Linear servos?
Views:
9,230
Posted By
Fred
Hi Edblad, servos use a feedback mechanism,...
Hi Edblad,
servos use a feedback mechanism, comparing the desired position (usually derived from a PWM signal [1-2ms pulses every 20ms]) with the actual position. In most standard RC servos, a...
Forum:
TTTT Gallery
09-19-2007, 03:55 AM
Replies:
12
Wheel Loader Liebherr 531 (1/87 model)
Views:
16,165
Posted By
Fred
Hi Prasanna, thanks for your concern and...
Hi Prasanna,
thanks for your concern and good wishes. At this point, it does not look like I am going to work on this model for a while. I will certainly report back if I make any progress with...
Forum:
Other Tiny RCs
07-14-2007, 07:37 AM
Replies:
4
Micro RC Boats...???
Views:
2,070
Posted By
Fred
Hi, although http://mikromodell.de/ is in...
Hi,
although http://mikromodell.de/ is in German, you should not have too many problems using this site for getting started. The site includes material on micro-submarines (look under "U-Boote")...
Forum:
TTTT Gallery
06-02-2007, 05:19 AM
Replies:
12
Wheel Loader Liebherr 531 (1/87 model)
Views:
16,165
Posted By
Fred
Hi Prasanna, thanks for your kind comments....
Hi Prasanna,
thanks for your kind comments. Unfortunately, I had to spend the last couple of weeks hospitalized and will not be discharged home until next week. Although I do not intend to stop...
Forum:
TTTT Gallery
05-08-2007, 07:46 PM
Replies:
12
Wheel Loader Liebherr 531 (1/87 model)
Views:
16,165
Posted By
Fred
Hi truckian, You are right, patience...
Hi truckian,
You are right, patience is the main building material. When you build your own gear, expect a mishap now and then and the part which took many hours to make ending up in the...
Forum:
TTTT Gallery
04-25-2007, 05:02 AM
Replies:
12
Wheel Loader Liebherr 531 (1/87 model)
Views:
16,165
Posted By
Fred
Hi, please bear with me, this is the first...
Hi,
please bear with me, this is the first time I used the macro mode of my old digicam for taking a video and the first time I attempted to edit a video. I tried controlling the R/C TX and the...
Forum:
TTTT Gallery
04-22-2007, 11:53 AM
Replies:
12
Wheel Loader Liebherr 531 (1/87 model)
Views:
16,165
Posted By
Fred
Hi, my digicam is pretty lousy at taking...
Hi,
my digicam is pretty lousy at taking videos (poor spatial and temporal resolution) . I will still give it a try, but I am not sure I will be successful.
Regards,
Fred
Forum:
TTTT Gallery
04-22-2007, 10:38 AM
Replies:
12
Wheel Loader Liebherr 531 (1/87 model)
Views:
16,165
Posted By
Fred
Wheel Loader Liebherr 531 (1/87 model)
Hi,
currently, I am working on a 1:87 scale model of the Liebherr 531 (L531) wheel loader. The full scale version weighs approx. 12 metric tons. The German manufacturer Wiking sells several...
Forum:
TTTT
04-20-2007, 11:11 AM
Replies:
18
Flexprint cable in micromodels
Views:
12,746
Posted By
Fred
Hi, I agree. Is your high speed connection...
Hi,
I agree. Is your high speed connection up and running?
I ended up building a new frame for the main transmission:
http://www.fhs-consulting.com/ind/mm/gear_frame_with_bearings.jpg
The...
Forum:
TTTT
04-05-2007, 02:09 PM
Replies:
18
Flexprint cable in micromodels
Views:
12,746
Posted By
Fred
Hi, in short: the electronics are in great...
Hi,
in short: the electronics are in great shape, but I do experience unanticipated problems with my main transmission. As soon as there is weight on the main axle, friction in the transmission...
Forum:
TTTT
03-30-2007, 12:29 AM
Replies:
18
Flexprint cable in micromodels
Views:
12,746
Posted By
Fred
Hi kalkurap, there may be differences in...
Hi kalkurap,
there may be differences in terminology. To me, a "bulldozer" is chain driven, a "wheel loader" has wheels. Here is a link to a photograph of the type (full size) I am building as a...
Forum:
TTTT
03-29-2007, 01:11 AM
Replies:
18
Flexprint cable in micromodels
Views:
12,746
Posted By
Fred
Hi, I used to be able to do this type...
Hi,
I used to be able to do this type of work with just a pair of 3.5x mag loupes ... but my vision is no longer that good. Therefore, I prefer a stereo microscope (10x mag, occasionally 30x...
Forum:
TTTT
03-28-2007, 12:01 AM
Replies:
18
Flexprint cable in micromodels
Views:
12,746
Posted By
Fred
Hi, Excactly. I cut a trough in a piece...
Hi,
Excactly. I cut a trough in a piece of PTFE, lined up the LEDs (belly down), and added a tiny drop of Loctite 401 (dries up crystal clear, no "blooming") on each side. Capillary forces...
Forum:
TTTT
03-27-2007, 01:48 PM
Replies:
18
Flexprint cable in micromodels
Views:
12,746
Posted By
Fred
Hi kalkurap, the fishing line "trick" did...
Hi kalkurap,
the fishing line "trick" did not work as well as intended, because I accidently touched the line with a soldering iron... Maybe I can still connect both ends by heating them.
I...
Forum:
TTTT
03-26-2007, 12:45 AM
Replies:
18
Flexprint cable in micromodels
Views:
12,746
Posted By
Fred
Hi kalkurap, for soldering, it can be...
Hi kalkurap,
for soldering, it can be helpful to use silver solder (higher melting point) and leaded solder (lower melting point) on different ends of the same part. E.g. when connecting wires to...
Forum:
TTTT
03-24-2007, 01:31 AM
Replies:
18
Flexprint cable in micromodels
Views:
12,746
Posted By
Fred
Hi kalkurap, since you brought up...
Hi kalkurap,
since you brought up single-stranded enameled wire: The microcontrollers in my project are pretty tiny (Attiny2313-20MU: 4x4x0.75 mm MLF package). They were designed to be soldered to...
Forum:
TTTT
03-22-2007, 09:25 AM
Replies:
18
Flexprint cable in micromodels
Views:
12,746
Posted By
Fred
Flexprint cable in micromodels
Hi,
after good and bad luck with magnet wire (=enameled wire) and very small litz wire (multistranded insulated wire) in micromodels, I successfully tried flexprint cable (i.e. the stuff found...
Forum:
TTTT Gallery
02-23-2007, 01:12 PM
Replies:
9
Some pictures of my MAN truck
Views:
5,203
Posted By
Fred
Hello kalkurap, very nice job! This must be...
Hello kalkurap,
very nice job! This must be the first MAN 5t model with articulated steering(?). That's quite inventive. Again, very nice.
Glad to see someone else who develops his own...
Forum:
TTTT
01-14-2007, 10:41 AM
Replies:
35
aluminum instead of brass???
Views:
9,405
Posted By
Fred
BiLLy bOb, I think both volumes are great....
BiLLy bOb,
I think both volumes are great. You are right, they are in German. Although both books are well illustrated, you really have to comprehend the details of the descriptions to understand...
Forum:
TTTT
01-14-2007, 12:49 AM
Replies:
35
aluminum instead of brass???
Views:
9,405
Posted By
Fred
BiLLy bOb, I am new to this forum and not...
BiLLy bOb,
I am new to this forum and not sure if changing the topic within a thread is acceptable here... The HS55 servo is what I use in a slope soarer; but I have not used any commercial servos...
Forum:
TTTT
01-13-2007, 01:35 PM
Replies:
35
aluminum instead of brass???
Views:
9,405
Posted By
Fred
Hi BiLLy bOb, make sure you buy "free...
Hi BiLLy bOb,
make sure you buy "free machining /cutting brass " (DIN EN 17660 / MS58 or similar). How powerful is your soldering iron? Some folks love acid flux for soldering brass frames; I am...
Forum:
TTTT
01-13-2007, 12:30 AM
Replies:
35
aluminum instead of brass???
Views:
9,405
Posted By
Fred
BiLLy bOb, you mention that you are not too...
BiLLy bOb,
you mention that you are not too successful soldering brass. Solderabilty depends on the specific alloy. I have some brass in my scrap box (salvaged from old clocks) that does not...
Showing results 1 to 24 of 24
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