KHR-2HV question

[isseym88]

Help me please....

First question:
If want to add gyro control to a standard KHR-2hv what parts do I need to buy? And how many do I need?


Second question:
Kondo only offer two axis accelerometer, anyone using 3 axis accelerometer on their robot? where can I get it? Does it work with the factory RCB3J controller board?




Third:
3 axis accelerometer, how many gyro do I need?

Fourth: For gyro control do you connect RAS 1 to RCB-1HV? Is RCB-1HV required? Do i need to buy RCB-1 HV ? Does the included rcb3j board has a place for RAS 1?


Fifth:
Was told by someone that the function of Cable for configuring ICS Red-Version Servos (USB Interface) is already included in the software of KHR-2HV.

http://robosavvy.com/store/product_info ... ucts_id/88

Do I need to buy the part above?


Thanks

[hivemind]

A 2-axis accelerometer should be fine for any normal needs on a robot, it will cover both side to side and front to back, while the z axis is only needed if your robot is literally falling or to tell if it is upside down. So you should only need one 2-axis acceleromter located probably in the chest of your robot.

As for gyros, it is probably best to go with two, once again covering the side to side and then the front to back.

Hope that helps a little

[isseym88]

thanks .....hivemind I like what you are doing to your robot.
Do you have your own website for your robot? Can you point to me where to go.....



Thats basically answer all the questions. I still need answer to fourth and fifth question.

[Robo1]

Hello

Answer to your fifth question:

You don't need any separete cables to mod your servos you can do it in hth with the standard cable that gets shipped with the robot.

as for your Fourth question I haven't tried using a RAS 1 but should be able to plug it in to your analoge input. the only problem is that you only get 3. 2 would be used for the gyro and that only leaves you 1 left and I think the RAS 1 needs two, one for each axis. I'm not to sure if this is true as I havn't played with one yet.

bren

[shsan]

Q1: KRG3 is the Gyro for the KHR2 HV
http://www.kondo-robot.com/html/KHR2HV_OPTION.html

Q2: As Robo1 said the RCB3 controller has only 3 analog inputs so without modification you won't be able to use 2 Gyros and the 3 Axis of the Accelerometer.
Of course you could make a special circuit to select the axis via 1 or 2 servo command (using a low/high command you could switch the axis), but i don't know exactly what's involved at the electronic level (nothing serious i think though)
I have one 3 Axis accelerometer but i have not tried it yet.

[shsan]

Complement to Q2, a simple search in google for Analog Multiplexer should give you the chip I was thinking about.

Providing you dedicate 2 extra servos you could control a 4052B or something similar (some of Analog devices might be smaller) and use your 3 axis accelerometer with the RCB3 but you will have to pay attention to the switching time and measure time of the RCB3...

I might consider that myself, the RCB3 is too limited in the analog inputs front. The Motion processor is better but slower to communicate with and the protocol is still not public.

Hope this help.

[isseym88]

I think I am going to stick with 2 axis accelerometer.
I think I can use RSC-1 hv in conjunction with RCB3J. Can I?

or just replace RCB3J with motion processor HV in the link below.

http://robosavvy.com/Builders/limor/Mot ... Manual.pdf

If you can read Japanese...

Please have a look at this. How many anolog input does this comes with?

[shsan]

No idea about the RSC-1HV and RCB3J.

The motion processor has 8 analog inputs and 8 digital inputs (0,5v i think). It's also support 32 servos.

One annoying thing with it is that the analog inputs are not physically compatible with the cables provided for the gyros an accelerometer.

If you look in the manual, all analog inputs share the same +5v and ground and then there is 1 pin per channel.

Which means you have to make a small adapter or cut the cables..
I find that really annoying. I do have the motion processor.

Also the fact that the communication with the PC is done at only 19200bps is a bit of a problem if you want your pc to control the robot, well that and the fact that the protocol is undocumented.

But it's probably ok, if you just want your robot autonomous or remote controlled.

[isseym88]

The RCB3J that comes standard with kHR2 HV have a PC control speed of up to 115200bps so much faster than the motion processor that I mention above.

Do you think they have upgrade the motion processor yet? I think the pdf link I give above is not for the Motion processor High voltage since the pdf document says it run at 6-7.4 v.....so it might be that the High voltage motion processor has been upgraded to faster speed.

[shsan]

There has been an upgrade but just for the HV part. The speed is still 19200.
However i have seen in the specs of the chip used that it could go up to 57200.

So why is it not available at that speed is a mistery to me. I am planning to ask the question to the conceptor of the board next week-end at the RoboOne competition, so we might have an answer to that question.

[isseym88]

Shsan, I really like the R-blue robot by Mr. Yoshimura.

Please take a few close-up pictures of the R-Blue and email it of me. I am interested in any info that is related to the R-blue....

Do you know what blue tooth module he use..? I want to add bluetooth to mine.
On his website, the robot uses the ATmega128 controller.
What sort of servo he use?

I like the movement of his robot, its much more refine and smooth.



My email is tchi014@gmail.com.


Thanks..

[shsan]

Well there is some informations on his website.Not a lot i have to admit.

http://www.geocities.jp/koichi_rbv/

The servos seems to be the KRS4014HV.

[tempusmaster]

Well there is some informations on his website.Not a lot i have to admit.

http://www.geocities.jp/koichi_rbv/

The servos seems to be the KRS4014HV.

The Mark 10 spec lists KRS4013's -



But the website shows a mix of 4014's and 4024's.