I’ve started creating my version of the CH3-R using Hitec’s ultra nano servos.
I will add some drawings as as soon as I get some time. In the mean time here are some ideas I’ve had floating around in my mind.
The body and legs will be a scaled down version of the CH3-R using 1.5mm thick acrylic laser cut.
ponoko.com/make-and-sell/sho … ylic-clear
Depending on the weight limitations of the servos I may have to scale it down even further to 0.8mm thick. I will calculate the actual weight/cm when I add some images of the preliminary designs as well.
The servos will be HS-5035HD Digital Ultra Nano Servos
hitecrcd.com/products/digita … 035hd.html
If anyone has some new ideas or suggestions I am open to constructive criticism.
Hopefully I can get this project started soon!
EDIT:
I am very interested in some ideas for a smaller servo controller/bot board to keep the body as small as possible.
Can’t wait to see some images of what you have in mind.
for my project i will use a SSC32 linked to a ProMini Arduino.
viewtopic.php?f=20&t=8131
yes very cool can’t wait!!!
Hi! Sounds like a nice project. :mrgreen:
Just a few points I’d like to make to help out:
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1.5mm Acrylic will be incredibly brittle and will have a very high chance of snapping; I personally use 3mm. Maybe using 1.5mm ABS would be better for your design? It’ll be much less brittle than Acrylic, that’s for sure. 
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The servos that you’re using look good but don’t seem to have very much torque, I’m not sure if they’d be strong enough for your structure. I’m planning on making a Dragon robot for my next project (once the current ones are finished 
) and I’ll be using HS-81 servos because it’s going to be a mini dragon. ^____^
servoshop.co.uk/index.php?pid=HITHS81&area=Servo
Just thought these things might help.
Yeah, I agree with the acrylic being too brittle but I can get it cut pretty quick to work out any body design issues. Eventually I would like to get a material with a good weight/strength ratio.
I will definitely have to follow your dragon progress that sounds like a blast for a project!
Pssttt…
Mine is cut by me with 1mm G10 (Fiberglass) material and will be cut in carbon fiber once the design final.
I would love to do most of the cutting myself but right not it is mostly a time constraint issue. Work and class just won’t allow for much free time. The only reason I’ve got so much work done right now is because the Diablo servers keep going down 
I will look into fiberglass though. Carbon fiber has crossed my mind plenty of times 
Let me know if you need parts… 
Never had to add images to posts before so if I’m doing this completely wrong have some patience with me. But here is an “actual size” concept of the leg drawing so you can get a feel for the size. I am working on getting some 3d modeling of it put together quick and haven’t even started on the body yet.
I left the pencil and servo in so you could compare sizes.
very cool have you thought of 1mm aluminium for the body, and seeing as it’s so small what about using a infrared receiver and universal TV remote to control it instead of a ps2 controller or diy rc the ir receiver is the size of a medium transistor and parallax has done the code for the boe bot so I don’t think it will be hard to convert it for the chr-01 nano, as for microcontrollers what about the propeller or bs2p40 so you don’t need a servo controller (save weight, space, $$$)
Just thinking out aloud
Regards
Yes, I have been floating around a bunch of different material types for now. I am however leaning towards the carbon fiber just because of the different look it will give.
I’m really liking the IR receiver/Universal TV remote idea. That is something I have not yet considered. I would prefer something with control connection being more stable such as zigbee/xbee.
I’m not as familiar with microcontrollers as I would like to be but the bs2P40 just might be an excellent option.
I hopefully will come up with a body design over lunch today. And want to say thanks for all the input from everyone!
There will definitely be more questions to come your way.
I do like the carbon fiber idea I would use it my self if I knew how
Are you going to use the ses micro brackets or make them seeing as the servos are so small
Really cool
How big is the entire bot going to be
Regards
I will probably design my own brackets to fit the servo. I haven’t checked out the ses micro brackets yet for size though. The overall size of the body will be about 115mm side to side. I’ll post a picture of what I came up with today over lunch later tonight.
This is what I have in mind to for actual size legs and body. I haven’t decided how big I want to make the femur yet. Any suggestions? Also I’m looking for some feedback to the relation in size between the tibia and body.
as always thanks for the support and responses
Brent
Cool body I would think it should be basally in relation to the chr-01. What is the scale body of your robot in relation to the chr-01’s then you will know if the tibias in range. what are you thinking in terms of power lipo mite be a good choice but I have never had much luck with them I like good old NiCad batteries. It seems from your picture that you could use the ssc32 and bot board and the chr-01’s code because the body is big enough to fit it on but it’s gonna be tight.
Regards,
Dean
Sorry it has been a while since I could get back to the project. It has been the summer of weddings in my family this year (6 total).
Exactly my thoughts for now. I will stick with some old NiCad packs I have laying around.
I compared size of the body I sketched out with the spare ssc32 I have sitting around and It is slightly too large to stuff into the body. Either I need to re-scale the body larger or come up with an alternative route for electronics. I really don’t want to sacrifice too much more size to fit electronics as the goal of the project is to keep the body as small as possible.
I finally have a weekend free coming up here so hopefully I can get some CAD drawings up here for you all to give me some more input.
Hello
Just wondering what happened to this project are you still making it since the last post was more than a month ago.
Regards
P.S. great project it would be a sham to scrap it
I haven’t scrapped it yet I’ve just been busy with work and school. Hopefully I will.graduate at the end of this year and have more free time. I’ve been working on some CAD drawings with a mechanical engineer friend of mine and I will hopefully get around to finishing them soon.
I know it has been a while since I’ve posted here, but I am thinking about taking some time to resurrect the Nano CH3-R idea.
I hope all of the recognizable names are still lurking the forums because I know I will have lots of questions coming.
I have restarted my research into available controller boards and I am wondering if anyone has any experience using the Adafruit 16-Channel I2C Servo Board (PCA9685) cdn-shop.adafruit.com/datasheets/PCA9685.pdf
I would like to pair it with some flavor of an Arduino micro board to get things off the ground and running. If I get some good results I may try to build a custom board to fit the body of the hex.
Anyways, sorry its taken so long but I hope to start making some progress again!
Cheers!
Hello, I have also been dormant on these forms for a while but I’m looking to get back to my robots, I recently purchased that adafruit controller and paired it with an arduino uno for a university project it works well, no complaints I have several ideas for my next bot and was thinking about Scapel from the transformer series
Or a recreation of the crust crawlers hdats or my battle bot, but before any of that I got to get my controller working properly with the bots I have so that’s this week’s task.
Other than that I’m glad someone else is looking to revive the old robot army
Regards
https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRrxeVUOnh5KNASkBVcy2nBrqv3HTeu2zUionAFNpgXxGDwPVPt
) and I’ll be using HS-81 servos because it’s going to be a mini dragon. ^____^
I will look into fiberglass though. Carbon fiber has crossed my mind plenty of times 
