Gyro in Robonova-1 ?
by limor
Thu Jun 22, 2006 11:26 am
H3dude wrote:I just compiled all this info and blogged it on my site, with photos and video here http://www.theoddrobot.com/2006/06/project-how-to-add-gyros-to-your.html
Many thanks to Pev, dshinsel, subpilot, BauerMech, and everyone who helped me figure this out.
I'd like to add some of the code I wrote to the wiki but I don't see to have access.
Fantastic job on the blog!
The Robonova Wiki can be accessed here: http://www.robosavvy.com/phpnuke/module ... Robonova-I
to edit, use the word aibo
I've tried to create a "standard" look to the sections but it is still very much work in progress. Feel free to add or modify anything. Any contributions will be very much appreciated.
by roycepipkins
Thu Jun 22, 2006 9:18 pm
Does anyone have a link to the specifications of the electrial output of the GWS PG-03 Gyro? I'm looking for enough information to fake the signal such that I can hook a microcontroller up to the robobasic board's gyro input and have it believe there is really is a GWS PG-03 Gyro connected.
I get the feeling the Gyro is PWM and has a zero reset signal, but that's all I know.
I get the feeling the Gyro is PWM and has a zero reset signal, but that's all I know.
GWS Gyro specs
by dshinsel
Fri Jun 23, 2006 8:22 pm
Pretty much any RC Gyro works as follows:
Input receives standard Servo pulse:
Pulse is every 20ms
Pulse width varies to set position of servo (standard is 1ms - 2ms)
Output is the same pulse as the input, but the pulse width is either stretched or shrinked depending upon the gyro activity.
Picture a helicopter where the tail rotor is being controlled by a RC controller. User input controls the servo. But, the Gyro modifies the Servo pulse to compensate automatically for sudden movements (like wind).
Makes sense?
so, your microprocessor just needs to put out a pulse every 20ms, and vary the pulse width between 1 and 2 ms... for Gyro, I bet it's more like 1.5ms +/- 0.2ms or so.
If you really need hard data, I an put my GWS on a scope and let you know the range I get.
[/quote]
Input receives standard Servo pulse:
Pulse is every 20ms
Pulse width varies to set position of servo (standard is 1ms - 2ms)
Output is the same pulse as the input, but the pulse width is either stretched or shrinked depending upon the gyro activity.
Picture a helicopter where the tail rotor is being controlled by a RC controller. User input controls the servo. But, the Gyro modifies the Servo pulse to compensate automatically for sudden movements (like wind).
Makes sense?
so, your microprocessor just needs to put out a pulse every 20ms, and vary the pulse width between 1 and 2 ms... for Gyro, I bet it's more like 1.5ms +/- 0.2ms or so.
If you really need hard data, I an put my GWS on a scope and let you know the range I get.
[/quote]
Dave Shinsel
dshinsel <insert at sign> verizon.net
dshinsel <insert at sign> verizon.net
by roycepipkins
Fri Jun 23, 2006 8:49 pm
Thanks a bunch Dave, that really helps. I'm not to the point where I need hard data. I'm mostly brainstorming about fun stuff to do to my RN-1 and trying to determing how feasible my ideas are and how much work they might take to pull off.
Btw, shouldn't your icon show your blue RN-1 riding on your RoboMagellan like you had riding in the RoboGames pits?
Take care,
Royce
Btw, shouldn't your icon show your blue RN-1 riding on your RoboMagellan like you had riding in the RoboGames pits?
Take care,
Royce
goes back to the downhill skier position again ???
by CaptKill4Fun
Sun Jun 25, 2006 8:18 pm
...
Last edited by CaptKill4Fun on Sun Aug 06, 2006 7:03 am, edited 4 times in total.
by bauermech
Sun Jun 25, 2006 10:16 pm
In the manual (page 93) it shows how two different brands need a different "module number". In their exmple a "1" is placed in front of the channel number for the KRG-1 gyro. Maybe Futuba requires a different number as well? The GWS works quite well... I haven't tried the KRG or Futuba models, so this is simply a guess.
You shouldn't need to adjust the zero settings at all. Once the gyro's are on, your bot probably won't be perfectly perpendicular to the floor from the get-go. You will want to adjust the "setup" and gain pots to get him exactly upright.
Hope this helps some?
You shouldn't need to adjust the zero settings at all. Once the gyro's are on, your bot probably won't be perfectly perpendicular to the floor from the get-go. You will want to adjust the "setup" and gain pots to get him exactly upright.
Hope this helps some?
by bauermech
Mon Jun 26, 2006 12:43 am
upload
http://robosavvy.com/Builders/bauermech/gyrohelp.BAS
into your RN-1.
By pressing button 1, turns gyro's off... 2 turns both of them on, 3 turns ony the fore/back on, and 5 turns only right/left sway on.
...see if that works. (I haven't tested this particular code)
You can call the subroutine gyro_on or gyro_off in code to turn off the gyros when you have problems w/ certain moves and back on once he needs them again...
Some other people have been asking, so I'll post this too:
...It's about everything I know about these.
The key to making the gyros work well is in their placement and adjusting the pots inside each gyro. For forward/backward gyros, the shoulder works well. Just be sure it's facing the right direction (see pic). The way I have it set up is that gyro one is fore/back (robot's left shoulder in pic) and is connected to AD0 (gyro's pre-existing lead) and AD4 (lead you need to install) - gyro two (R/L sway - robot's right shoulder in pic) is on AD 1 (gyro's pre-existing lead) and AD5 (lead you need to install).
Next, adjust the gain pot right between 1/3 and the half-way point. Then w/ the RN-1 on, set the setup pot so that your robot stands upright. The red and green LED's should light up simultaneously. You can tweak it as needed, but this should give you a good starting point. If you notice twitching, turn the gain down (slightly) and re-adjust the setup pot to compensate.
For the right/left (sway) gyro, I set the gain between 1/4 to 1/3 from nil. Unlike the fore/back gyro, the red LED seems to always stay on after adjusting the setup pot. As long as he looks perpendicular to the floor, and isn't twitching, it's right. Remember, AD pins on the MR-C3024 are as follows
Top pin = gnd (black or brown)
Center pin = + (red)
Bottom pin = signal (white or orange)
When making the return lead from the gyro to the AD pin, only the signal is needed. You can leave out hte positive and the ground.
If none of this works w/ your GWS PG-03, I don't know what to tell you. Maybe you have a defective gyro?
Good luck
http://robosavvy.com/Builders/bauermech/gyrohelp.BAS
into your RN-1.
By pressing button 1, turns gyro's off... 2 turns both of them on, 3 turns ony the fore/back on, and 5 turns only right/left sway on.
...see if that works. (I haven't tested this particular code)
You can call the subroutine gyro_on or gyro_off in code to turn off the gyros when you have problems w/ certain moves and back on once he needs them again...
Some other people have been asking, so I'll post this too:
...It's about everything I know about these.
The key to making the gyros work well is in their placement and adjusting the pots inside each gyro. For forward/backward gyros, the shoulder works well. Just be sure it's facing the right direction (see pic). The way I have it set up is that gyro one is fore/back (robot's left shoulder in pic) and is connected to AD0 (gyro's pre-existing lead) and AD4 (lead you need to install) - gyro two (R/L sway - robot's right shoulder in pic) is on AD 1 (gyro's pre-existing lead) and AD5 (lead you need to install).
Next, adjust the gain pot right between 1/3 and the half-way point. Then w/ the RN-1 on, set the setup pot so that your robot stands upright. The red and green LED's should light up simultaneously. You can tweak it as needed, but this should give you a good starting point. If you notice twitching, turn the gain down (slightly) and re-adjust the setup pot to compensate.
For the right/left (sway) gyro, I set the gain between 1/4 to 1/3 from nil. Unlike the fore/back gyro, the red LED seems to always stay on after adjusting the setup pot. As long as he looks perpendicular to the floor, and isn't twitching, it's right. Remember, AD pins on the MR-C3024 are as follows
Top pin = gnd (black or brown)
Center pin = + (red)
Bottom pin = signal (white or orange)
When making the return lead from the gyro to the AD pin, only the signal is needed. You can leave out hte positive and the ground.
If none of this works w/ your GWS PG-03, I don't know what to tell you. Maybe you have a defective gyro?
Good luck
by robodude666
Mon Jun 26, 2006 3:57 am
Hey,
It is good to see people talking and stuff, but could you please use normal size font? I don't mind the color but the font size is like "WHOA IN YOUR FACE" type of font size and it burns my eyes =/ and also makes the page really wide.
As for my question. What does the gryo do exactly? Just stabilize the robot so it can't be pushed over? Can it be used to stabilize the robot while its doing an action such as fly?
It is good to see people talking and stuff, but could you please use normal size font? I don't mind the color but the font size is like "WHOA IN YOUR FACE" type of font size and it burns my eyes =/ and also makes the page really wide.
As for my question. What does the gryo do exactly? Just stabilize the robot so it can't be pushed over? Can it be used to stabilize the robot while its doing an action such as fly?
by robodude666
Mon Jun 26, 2006 5:32 am
Oh, sorry and thanks a lot for making the font smaller 
This looks cooler also!
So the gyro can be used while the robot is doing an action so that the robot won't get knocked over? I guess its only sorta really needed if your planning on doing a robot combat thing like at robo games...
Because like, if you don't change the robot's weight around and you make the program so that the robot is not unbalanced and you don't try pushing the robot while its doing the action it shouldnt fall over... Unless it is in the middle of a battle with another robot
This looks cooler also!
So the gyro can be used while the robot is doing an action so that the robot won't get knocked over? I guess its only sorta really needed if your planning on doing a robot combat thing like at robo games...
Because like, if you don't change the robot's weight around and you make the program so that the robot is not unbalanced and you don't try pushing the robot while its doing the action it shouldnt fall over... Unless it is in the middle of a battle with another robot
by bauermech
Mon Jun 26, 2006 6:01 am
What does the gryo do exactly? Just stabilize the robot so it can't be pushed over? Can it be used to stabilize the robot while its doing an action such as fly?
It is not a cure-all, but does help tremendously with keeping your robot upright.
We used exactly the same setup (as posted above) for the soccerbots at RoboGames. They competed on a "grass carpet/astro-turf" field. Even w/ the gyros, they would sometimes fall during a routine... but not as frequently as RN-1's w/o. During testing, I demonstrated the "fly" routine. While in the middle of it (bent over and standing on one leg) I could push him and he wouldn't fall over. Same held true when kicking (shooting).
Geeze, I have my Gyro-1 AD0 & AD4 on the Left shoulder but it's facing exactly opposite (180° Backwards) from yours
How odd...
... when I had it facing the other way (your forward) my bot was stuck in downhill skiier mode and the SetZero program couldn't override it ??? But with the INPUT facing forward my bot seems to mostly be working right ....
I don't know, but I wouldn't think you'd need to adjust your zero settings. Personally, I'd turn off the gyros, reset the zero points to where you originally had them, upload this .bas file to the RN-1, and go from there. It seems like you’re adding more steps than you need to... but that's just me.
Regardless, I hope it works out for ya!
by H3dude
Mon Jun 26, 2006 6:32 am
robodude666 wrote:Hey,
It is good to see people talking and stuff, but could you please use normal size font? I don't mind the color but the font size is like "WHOA IN YOUR FACE" type of font size and it burns my eyes =/ and also makes the page really wide.
As for my question. What does the gryo do exactly? Just stabilize the robot so it can't be pushed over? Can it be used to stabilize the robot while its doing an action such as fly?
robodude666 check this out, it's working great for me http://www.theoddrobot.com/images/robonova_v_gyro.wmv
