Re: [TANKS] linier drive for steering?
It wont, or at least not open loop. Youll need some sensor to tell it when it centers... On 2014-03-25 10:38 PM, odysseyslipw...@aol.com 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, odysseyslipw...@aol.com 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? chris -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[TANKS] Re: More Renderings
I was going through some old boxes last night and lo and behold, my Rhino 3D CD's popped out! Without a hitch, it loaded onto my current PC and it updated to the current level. Look's like I'm back into 3D tank modeling! ST On Thursday, November 19, 2009 5:36:44 PM UTC-5, TyngTech wrote: Been hacking my brains out at home with a cold so was able to get more practice with this 3D stuff. Modeled the M1 motor as an exercise in extruded shapes and edge filleting. This is almost as much fun as building a real tank. Steve Tyng -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [TANKS] linier drive for steering?
There is a website that describes using a servos electronics to make a wiper motor act like a giant servo. Can't find it at the moment though. Sent from my iPhone On Mar 26, 2014, at 6:54 AM, isaac goldman panthergol...@gmail.com wrote: It wont, or at least not open loop. Youll need some sensor to tell it when it centers... On 2014-03-25 10:38 PM, odysseyslipw...@aol.com 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, odysseyslipw...@aol.com 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? chris -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [TANKS] linier drive for steering?
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, odyssey...@aol.com 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, odyssey...@aol.com javascript: 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 rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [TANKS] linier drive for steering?
You can for ~ 30$ on hobbyking.com 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 steve...@gmail.com 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, odyssey...@aol.com 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, odyssey...@aol.com 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 rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. 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 rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [TANKS] linier drive for steering?
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.comhttp://www.google.com/url?q=http%3A%2F%2Fhobbyking.comsa=Dsntz=1usg=AFQjCNGM7FiZ5OPYL2izyuyjrVwqybeC5wbuy 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 stev...@gmail.comjavascript: 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, odyssey...@aol.com 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, odyssey...@aol.com 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 rctank...@googlegroups.com javascript: To unsubscribe, send email to rctankcombat...@googlegroups.comjavascript: 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 rctankcombat...@googlegroups.com 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 rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [TANKS] linier drive for steering?
1) because in the specific case of a stepper motor you can operate open loop. So long as you know where you started and how many intervals youve gone you know where you are... 2) any microcontroller these days can drive a stepper motor. Appropriate control would ideally constitute a way to zero the motor's controller in order to detect if a step was skipped, such as a magnet and hall effect sensor on the shaft... On 2014-03-26 12:03 PM, TyngTech steve...@gmail.com wrote: 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.comhttp://www.google.com/url?q=http%3A%2F%2Fhobbyking.comsa=Dsntz=1usg=AFQjCNGM7FiZ5OPYL2izyuyjrVwqybeC5wbuy 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 stev...@gmail.com 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, odyssey...@aol.com 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, odyssey...@aol.com 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 rctank...@googlegroups.com To unsubscribe, send email to rctankcombat...@googlegroups.com 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 rctankcombat...@googlegroups.com. 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 rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com Visit the group at http://groups.google.com/group/rctankcombat --- You received this message because you are subscribed
Re: [TANKS] linier drive for steering?
Sounds complicated...lol Derek On Wed, Mar 26, 2014 at 12:43 PM, isaac goldman panthergol...@gmail.comwrote: 1) because in the specific case of a stepper motor you can operate open loop. So long as you know where you started and how many intervals youve gone you know where you are... 2) any microcontroller these days can drive a stepper motor. Appropriate control would ideally constitute a way to zero the motor's controller in order to detect if a step was skipped, such as a magnet and hall effect sensor on the shaft... On 2014-03-26 12:03 PM, TyngTech steve...@gmail.com wrote: 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.comhttp://www.google.com/url?q=http%3A%2F%2Fhobbyking.comsa=Dsntz=1usg=AFQjCNGM7FiZ5OPYL2izyuyjrVwqybeC5wbuy 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 stev...@gmail.com 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, odyssey...@aol.com 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, odyssey...@aol.com 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 rctank...@googlegroups.com To unsubscribe, send email to rctankcombat...@googlegroups.com 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 rctankcombat...@googlegroups.com. 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 rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com
Re: [TANKS] linier drive for steering?
A servo would probably be simpler but more expensive On 2014-03-26 2:14 PM, Derek Engelhaupt tan...@gmail.com wrote: Sounds complicated...lol Derek On Wed, Mar 26, 2014 at 12:43 PM, isaac goldman panthergol...@gmail.comwrote: 1) because in the specific case of a stepper motor you can operate open loop. So long as you know where you started and how many intervals youve gone you know where you are... 2) any microcontroller these days can drive a stepper motor. Appropriate control would ideally constitute a way to zero the motor's controller in order to detect if a step was skipped, such as a magnet and hall effect sensor on the shaft... On 2014-03-26 12:03 PM, TyngTech steve...@gmail.com wrote: 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.comhttp://www.google.com/url?q=http%3A%2F%2Fhobbyking.comsa=Dsntz=1usg=AFQjCNGM7FiZ5OPYL2izyuyjrVwqybeC5wbuy 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 stev...@gmail.com 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, odyssey...@aol.comwrote: 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, odyssey...@aol.com 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 rctank...@googlegroups.com To unsubscribe, send email to rctankcombat...@googlegroups.com 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 rctankcombat...@googlegroups.com. 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.
Re: [TANKS] linier drive for steering?
You fell right into Mr. Tyng's trap ;-) By definition, as soon as you add feedback of any kind to an open loop controller (aka. non-feedback controller), it becomes a closed loop controller. Practically speaking, a true open loop stepper controller would be a very poor steering controller because the terrain could easily cause the stepper motor to mechanically miss a step. Once any step is lost, the controller will never find true center again. Over time, random losses would yield a Brownian Motion controller ... not what most people want when driving a car. A servo (any motor + position feedback) is the undisputed king of steering mechanisms. On 3/26/2014 1:43 PM, isaac goldman wrote: 2) any microcontroller these days can drive a stepper motor. Appropriate control would ideally constitute a way to zero the motor's controller in order to detect if a step was skipped, such as a magnet and hall effect sensor on the shaft... -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [TANKS] linier drive for steering?
The subject of using stepper motors for wheeled vehicle steering has been brought up. I'm not going to assume that everyone on this list knows what a stepper is so I'm going to tell you. A stepper motor is a type of electric motor that increments in one direction or another in very precise increments or steps. Typical steppers are configured for 200 steps for a full revolution. Steppers can be found moving the print heads of most inkjets and 3D printers, CNC machinery, and any other device that requires very precise positioning. To move (or drive) a stepper requires a stepper driver and a control source that will pulse a direction and step signal to the driver (a computer or micro-controller). To control a stepper from an R/C receiver will require a micro-controller that will read the signal from the Rx and convert that to signals that the stepper driver can interpret. SO were talking a bunch of hardware and custom programming to implement such a setup. As luck would have it, someone has already come up with a solution for driving steppers from R/C equipment. http://store.cunningturtle.com/products/radio-controlled-stepper-kit The Cunning Turtle solution drives a stepper much as any typical R/C ESC would drive a brushed electric motor (proportional forward and reverse). It does have an absolute control function where it will move X amount of steps in either direction proportional to control input (TX stick position), but there is no closed loop feedback to compensate if the stepper gets forced in one direction or the other. Also, the Cunning Turtle ESC can only drive smaller steppers of 500mah or less. ST -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[TANKS] Re: More Renderings
Nice. What are you modeling with? -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[TANKS] Survey time!
https://www.surveymonkey.com/s/8B7HVR2 I'm guessing no news is good news. So, I'm putting it out there officially, take it, let me know what you want. I'd like to put it more places, I'll be working on that tomorrow probably. Interesting thing was the interest in WWI. That and interest in a tank for less than $1000. Not sure that's quite possible. Granted it's retail, but just looking at batteries and motors and stuff, I'm looking at darn close to a thousand without the body. And that's without factoring in cost of labor and machine time. -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[TANKS] Re: Interesting article
Interesting article, thank you On Tuesday, March 25, 2014 1:12:10 PM UTC-5, TyngTech wrote: http://www.slate.com/blogs/the_vault/2014/03/25/photos_tank_manufacturing_during_wwii.html -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[TANKS] Re: More Renderings
Clay is always a nice medium. LOL. On Wednesday, March 26, 2014 6:39:02 PM UTC-4, Loren wrote: Nice. What are you modeling with? -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[TANKS] Re: Survey time!
I took your survey. This business of yours sounds interesting--good luck! Don't be afraid to charge $5000 or more for a good 1:6 scale tank--but then, you're be more qualified to put a price on it than I am. Again, good luck! -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [TANKS] linier drive for steering?
i was thinking, if it needs some sort of mechanical device, what about something like a linier (i know stat isn't the right word, a pot maybe?) that one could be set up to both sides of center on the of the worm gear that when the gear turns and moves the tab (or what ever you want to call the mounting point that moves the steering) it also moves the pot(?) and it gives some sort of electrical strength feed back (or what ever the true technical term may be) so that when the stick is moved back to center the pot tells (?) what to do to center it again. In a message dated 3/26/2014 7:54:37 A.M. Eastern Daylight Time, panthergol...@gmail.com writes: It wont, or at least not open loop. Youll need some sensor to tell it when it centers... -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [TANKS] linier drive for steering?
i have seen a few (some talk of some board - i forget the name and where at the moment, i think one person said it wasn't available any more, but that could have been an older piece of equipment first used for this) and still need to read them more in depth (when time becomes available), but was just wondering if a linier drive was any better/easier to use. chris In a message dated 3/26/2014 9:44:28 A.M. Eastern Daylight Time, tan...@gmail.com writes: There is a website that describes using a servos electronics to make a wiper motor act like a giant servo. Can't find it at the moment though. -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [TANKS] linier drive for steering?
thanks for the links Steve, i'll look at them later tonight when i get back online again. i was looking at some threads on where some where talking about using wiper motors and hacking servo's but they didn't say anything about an amplifier (i may have missed that due to skimming and saving the site to read over them later). when i was seeing Hack i was thinking the meant more on the lines of having to get further into the control board such as programing, (something i know nothing of) or at the very least altering the board in some way (one of the reasons i was wondering about going linier). would a larger, sail servo (i think that's what thy are called) be more practical for this (wiper motor)application? as for the amplifier, that's just so one can power the wiper motor directly, right? what about using relays instead, wouldn't they do about the same job this way they could handle more current better than a circuit board? chris In a message dated 3/26/2014 10:02:47 A.M. Eastern Daylight Time, steve...@gmail.com writes: 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 ser vo. 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, odyssey...@aol.com 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, _Odyssey...@aol.com_ (javascript:) 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 rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 _rctankcombat+unsubscribe@googlegroups.com_ (mailto:rctankcombat+unsubscr...@googlegroups.com) . For more options, visit https://groups.google.com/d/optout. -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [TANKS] linier drive for steering?
interesting, i will have to take a look chris In a message dated 3/26/2014 11:05:36 A.M. Eastern Daylight Time, panthergol...@gmail.com writes: You can for ~ 30$ on _hobbyking.com_ (http://hobbyking.com/) 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... -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [TANKS] linier drive for steering?
a person such as myself would most likely go for the servo solution vs trying to figure out the separate goodies placed before them to do the same job chris In a message dated 3/26/2014 2:15:57 P.M. Eastern Daylight Time, panthergol...@gmail.com writes: A servo would probably be simpler but more expensive -- -- You are currently subscribed to the R/C Tank Combat group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat+unsubscr...@googlegroups.com 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 rctankcombat+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
