"And as an aside you dont need a closed loop system; a stepper motor with appropriate controls will work fine"
Since Chris is looking for self-centering, care to elaborate on why closed loop would not be needed? Also, for those that may not be as well versed in stepper drivers, care to list the "appropriate controls" to make a stepper motor function is this R/C controlled application? ST On Wednesday, March 26, 2014 11:05:00 AM UTC-4, True North Armouries wrote: > > You can for ~ 30$ on > hobbyking.com<http://www.google.com/url?q=http%3A%2F%2Fhobbyking.com&sa=D&sntz=1&usg=AFQjCNGM7FiZ5OPYL2izyuyjrVwqybeC5w>buy > servos with 30 to 40 kgcm of torque; the one i got for my turret zenith > has 40 kgcm or almost 3 ft-lbs. You no longer need to custom make a > solution. > > And as an aside you dont need a closed loop system; a stepper motor with > appropriate controls will work fine... > > > On Wed, Mar 26, 2014 at 10:02 AM, TyngTech <[email protected]<javascript:> > > wrote: > >> Chris, >> >> For wheeled steering, no matter the mechanics (linear or rotary >> actuation), you will want to implement a closed loop control system. In >> other words, an R/C servo setup. If you take a servo apart, you will have >> a control board, a motor, and a feedback potentiometer (or pot). It's >> this pot that tells the control board where the output shaft is located. >> Since most hobby servo's are to small to handle the steering for our scale >> vehicles, one needs to build a Jumbo servo. You can hack a standard servo >> by adding an amplifier stage to power a larger motor or just get one of >> several commercial products meant for building bigger servos. These boards >> can be interfaced into practically any DC gearmotor and off the shelf pot >> to make a super servo. Peruse through the following sites to learn more. >> >> http://en.wikipedia.org/wiki/Servo_(radio_control) >> http://rcpowerservo.com/ >> >> http://www.pololu.com/category/95/pololu-jrk-motor-controllers-with-feedback >> >> ST >> >> >> >> >> On Tuesday, March 25, 2014 10:38:58 PM UTC-4, [email protected] wrote: >> >>> so anyone have any idea on how to make it self center? >>> >>> In a message dated 3/24/2014 7:13:17 P.M. Eastern Daylight Time, >>> [email protected] writes: >>> >>> recently during one of my boring moments sitting here on line, i saw a >>> some of sketches for a wheeled vehicle i work on from time to time and >>> continued the thought..... >>> >>> i all ready worked out the basics for the upper and lower control arms, >>> how to make them pivot, i worked out how i would make the spindle/hub/block >>> thingie for where the wheels/hubs would mount as well as figured out (3 >>> quick doodles later) the best way to make it have steering for the powered >>> wheels making for an all powered wheeled vehicle (i think i even have the >>> suspension worked out, i just have to hit home depot at some >>> point) ........ but that just left the one big thing, how to steer it. >>> >>> i saw the threads for using a wiper motor and at the moment that seems >>> to be about the most basic way to go (plus the "whatever stuff" for making >>> it auto center afterwards like a servo) ..... a bit over my head for the >>> moment i guess, but was just thinking, what about one of the linier drive >>> thingies? them things with the long worm screw powered by a geared motor? >>> other than space being a possible restriction, would they be any easier to >>> work with? would they offer better benefits such as more torque? or would >>> it just be harder to work with? >>> >>> -- >> -- >> You are currently subscribed to the "R/C Tank Combat" group. >> To post a message, send email to [email protected] <javascript:> >> To unsubscribe, send email to [email protected]<javascript:> >> Visit the group at http://groups.google.com/group/rctankcombat >> >> --- >> You received this message because you are subscribed to the Google Groups >> "R/C Tank Combat" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> For more options, visit https://groups.google.com/d/optout. >> > > > > -- > Isaac Goldman > 5142334423 > > This message contains confidential information and is intended only for > the individual named. If you are not the named addressee you should not > disseminate, distribute or copy this e-mail. > -- -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed to the Google Groups "R/C Tank Combat" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
