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Model Forum / Radio Controlled / Air Models / September 2005futata 3003 tec. specs
Hi, does any one have the full tech.spec-sheet for futaba 3003 std.servo I can only find info about fork and speed. ( looked at futaba and tower) i would like to know how big an operational range the 3003's have. I have just mounted one as a retract servo and when forcing the servo by hand, it can operate the gear lock-to-lock but when i use the transmitter ( fc 18 v3 plus ) i cannot get the full 180 deg. it only moves approx. 140 deg. (both afr and atv are at maxed out at 110 %). will the 3003 operate at a full 180 deg. ?? if not what will ? Martin > Hi, > [quoted text clipped - 13 lines] > > Martin In case you where wondering , a FORK, is the danish (idiot) way of translating the word TORK, and not at all a typo. just so you know. ;-) I suppose to anyone who speaks English, that would be "torque". i.e. Ft/lb or N/m turning force Dave :^) or perhaps "forque"? >> Hi, >> [quoted text clipped - 16 lines] > In case you where wondering , a FORK, is the danish (idiot) way of > translating the word TORK, and not at all a typo. just so you know. ;-) yes. you're right. ( i speak mostly Danish ) so "forque" you too.... ;-). *giggle* ( sorry I just could'nt help my self. when I saw the word "forque" ) Martin > I suppose to anyone who speaks English, that would be "torque". > i.e. Ft/lb or N/m turning force [quoted text clipped - 21 lines] > > In case you where wondering , a FORK, is the danish (idiot) way of > > translating the word TORK, and not at all a typo. just so you know. ;-) > yes. you're right. ( i speak mostly Danish ) so "forque" you too.... > ;-). [quoted text clipped - 3 lines] > > Martin Nice to have you on the ng Martin, the only Danish I can say is "bacon" so you're doing fine, better than most Americans 8^p Safe flying, Dave :^) > Hi, > [quoted text clipped - 11 lines] > will the 3003 operate at a full 180 deg. ?? > if not what will ? I think you're going to need a proper retract servo like the S136. They're about £35 though. Quote from futaba-rc.com...... A retract servo is specifically used for mechanical retracts. It is a non-proportional servo which only moves 180 degrees. That is to say this servo is either "off" (gear up and fully locked) or "on" (gear down and fully locked). No ATV, EPA, or AST adjustments can be made on these servos because they are not proportional. The linkage must be set up properly to allow this servo to operate at its full range and do its job-securing your model's landing gear in a gear-up or gear-down position. .... End of quote I did see some time ago a website that showed you how to "convert" a 148 to act as a retract servo. I'm sure google would help you find it.  SignatureJohn P. - who flies on Epsom Downs, UK. http://www.flyrc.org.uk/ I'm sick of spam, so replace 'nojunkthanks' with 'john' if you want me to read any e-mailed reply! I have previously conveted a Hitec retract servo to be proportional if that helps... In the course of fixing the mechanical retracts on my Tucano, I had to replace the standard Futaba 3003 servo which was underpowered and had seen better days with a retract servo to provide enough torque. I ordered a Hitec jobby, but didn't realise that it was not a proportional position servo, it would only go from one stop to the other thru 180 degrees, which was more than I needed - argh! The Hitec servo has what looks like a small potentiometer that you also find in the Futaba servo, but in the case of the Hitec, it is actually a two-position switch. Swapping it directly with the Futaba pot, didn't work which suggested that the Hitec circuitry was only expecting a switch. The cases for the switch and pot were the same except the shaft on the Futaba is slightly longer, so by prising open the small metal tabs on the back of the switch and pot I was able to swap over their small circuit boards. Refitting it all along with the Futaba control circuit, which wouldn't fit in the Hitec servo case but was secured underneath, resulted in a perfectly functioning retract servo which I could control proportionally! Regarding the amount of movement, whilst setting up the throttle servos on the wifes new trainer a few weeks back, I noticed that with her transmitter, an old skysport 6 with no atv, it was not getting as much movement as my FF9 at 'standard' settings. I dug out an older Futaba transmitter and that gave more throttle servo movement than the Skysport6, but still not the same as the FF9 - go figure that one out! Cheers Chris If you have a buddy that has one of the Futaba computer radios such as the 8U or 9C, test the servo on either of them with max travel set to +/- 140%. All that said, I'm not sure a 3003 has sufficient fork for mechanical retracts??? Cheers -- \_________Lyman Slack________/ \_______Flying Gators R/C___/ \_____AMA 6430 LM____ / \___Gainesville FL_____/ Visit my Web Site at www.LymanSlack.com "martin" <w@> wrote in message > but when i use the transmitter ( fc 18 v3 plus ) i cannot get the full 180 > deg. it only moves approx. 140 deg. (both afr and atv are at maxed out at > 110 %). > will the 3003 operate at a full 180 deg. ?? I was looking at the servo signal with a oscilliscope, I am not getting the full pulse. hmmm. oh and the 3003 has sufficiant forque to operate the retracts. movement and lock. I am pretty confident that it could work ,, (if I had the 180 deg.´operation, that is ) hmm I think I need invest in a retract servo. :-/ Martin DK > If you have a buddy that has one of the Futaba computer radios such as the > 8U or 9C, test the servo on either of them with max travel set to +/- [quoted text clipped - 12 lines] >> out at 110 %). >> will the 3003 operate at a full 180 deg. ?? "Eurika" and/or hurra jubii and so on I managed to modify the servo (3003) to go 180, just by installing risistors. I will take some pics. and write a little song about it. and schematics. does anyone have a webpage, I want the world to know. Martin. > Hi, > [quoted text clipped - 13 lines] > > Martin or simply refer to = Alan's Hobby, Model & RC Web Links http://homepages.ihug.co.nz/~atong/ "Servo & TX alterations, calculators, clonepacs, make an ESC or winch, FAQ." Add Missing Channels to Transmitters Electronic Speed Controller using an old servo Diodes - How to jump to delta/charge/Cycle TX. FlyWire for Helicopter - Tony Van Roon Focus III - fit elevon trim. Futaba 9C - Spreadsheet for recording transmitter programming Futaba Campac. Make your own Clonepac aprox. $10. Futaba Clonepac. Futaba - Gyro hidden programs Futaba (FAQ) - switch numbers Futaba Service menu enabler, 128Kbit UltraPAC for Futaba, etc. Futaba - Service and/or Parts No Longer Available Futaba Skysport from 4 to 5 Ch. and Interface for PC GOSLOW: realistic flap and landing gear actuation- Brent's RC Hitec Flash 4 add Retract Switch - 5th channel Hitec Flash 4 - add Trainer buddy box facility. Hitec Flash 4&5 - Double Memory Flash 4 &5 Voltage Calibration Hitec Flash 4&5 - Fast-charging Mod Hitec Flash 4 X - convert to Flash 5 X Hitec HFP-10 - Servo Tester_Programmer inc Transmitter Pulse Width Tester. Hitec HAS-2MB R/C RX - Modify to 3ch etc - site down email Alan for details Hitec 535 - amend from 5 to 8 ch. Hitec Servo - current 49 chart & specs Is your Servo going Bad?? Linear Output conversion Ranger 3 - Extend to 7 Channel. Reverser: servo reversing for Y-cord operation Brent's RC RMG Servos (Yacht winches) Sailwinch Servo - Adjust number of turns from your TX *** S148 as a gear box.Servo - How the circuit works S148 Servo ... How to modify for 360 degree rotation Servo mods to 180 and 360 degree operation.. Gang and Fit servos to yachts & boats. Servo basics and driver - Ahmet Onat Servo Calculator - ensure servo is powerful enough for the job Servo Comparison Chart - extensive by Fatlion.com Servo to power your model boat Servo - Digital FAQs : Hitec answers*** Servo (Digital) Programmer FAQs Servo - extentions and jitters - JR. Servo - Center & End Point Adjustment FAQ Servo - FAQs : Hitec answers.*** Servo - Stop the jitters.: Hitec answers.*** Servo - Troubleshooting problems : Hitec answers.*** Servo Wiring Diagrams Tonegawa-Seiko Water Proof A Servo > "Eurika" and/or hurra jubii and so on > [quoted text clipped - 24 lines] > > > > Martin |
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