Just ordered the phoenix robot, should have it next week or so, then I need to ebay some servo’s for it and obtain a SS32 and the Atom Pro.
My question is, I have 4 S3004 servo’s anyone have any luck with these? quite frankly spending 121 bucks per 4 servo’s “hs-475’s”
is kinda crazy wonder if there is a lesser expensive alternative?
The idea I have is going to take a 4 channel RC transmitter and link that into the Atom Pro so I can make an RC Phoenix as for programming a single leg is it possible for me to somehow record my movements with 3 of the servo’s connected to the atom recording my movements of the RC controller so i can quickly figure out how all 3 servos move via code?
I have visual basic experience and the code looks pretty simple but have never programmed a basic stamp before and would like to make some really slick pre programmed movements for this spider based off 4 inputs and quite a bit of work id imagine.
i can say as i havent tested any other servos for this type of application.
you are in the same boat as me my friend, but i will say that if you are looking for small quantity’s of servos for a good price i would try ebay!
often you get one or two HS-645 servos selling from different sellers so i would say try there! I do, and iv managed to grab up some good deals.
i myself have a hexapod and runs on the 475’s without payload, plus its lexan cut pannels and not aluminium!
with the ssc-32 and also the atom you wont find them on ebay, trust me im looking too. enless someone on these forums are selling them you will rarly find them!
Hey guys check this out,
a website called basicx dot com has a servo called
GWS S06STD
Size 1.60" Long x 0.79" Wide x 1.69" Tall
Weight 1.69 oz
60° Rotation Speed 0.33 seconds @ 4.8v (0.27 seconds @ 6.0v)
Torque 100 oz-in @ 4.8v (111 oz-in @ 6.0v)
Operating voltage 4.2 - 7.2 volts DC Max
Operating current
Bearing type Self lubricating Bronze
Connector type Standard 3 wire Futaba plug with 10" wire lead
Included accessories 6 different servo horns, mounting screws/hardware
This might be a no name servo but wonder about this working with the phoenix? ehh ehh crosses fingers and at $13.46 for 10+ this is a shibby deal!
Well I’m not sure I would call GWS (aka Grand Wing Servo) a no-name brand but to each their own.
I believe it has already been mentioned that you basically get what you pay for with hobby servos. I would expect GWS servos to perform better than the MG995 but I don’t recall anybody ever posting that they had applied them to robots before… slightly different requirements than plastic and foam r/c planes which is what GWS manufacturs a lot of. You might want to go easy and buy only a couple to test and run through the paces before buying the whole lot. Maybe they will work well enough to be a better compromise between the mg995 and Hitec/Futaba/JR for some folks. GL.
about what you get what you pay for, I’m all with you there
Interesting about those MG995 servo’s I would have picked those for this robot… as for a 3 degree overshoot from this forum post I read they don’t seem all that bad… I know the phoenix robot might work fine with these servos if its only moving 3 degrees out of wack. “as per this forum post”
i’m all for cheep china knock off servos and crap at 200oz inches thoes are nearly 2x that of the ones i commented on eairler.
Obviously the ability for these 8 servo’s to hold up the weight of all your electronics I would be running
SS32
Atom Pro
Bot board
Futaba 8 Channel reciever “4 outputs linked to the botboard”
and some battery to power it all “not sure which one yet”
guessing that the weight of the components would need to be supported by 2 of the 3 servos only since the remaining servo only provides horizontal movement while the other 2 does vertical movement
… i guess how much fudge room do you have in terms of weight limits before you start having an issue ?
I know years ago when I did RC cars and such if you twisted a servo while it was on you heard it strain trying to keep that position fixed, I wouldn’t want to hear all 18 of those servo’s straining as I would imagine it cant be good for it.
15 minutes into writing this post, I read a review.
I think ill be avoiding the MG995 servo’s… anyone else got any good priced servos vs performance and life?
Another thing to think about is the physical size of the knock off servos. They are traditionally taller than the Hitec / Futaba / JR, name brand high quality servos. This means most of them will not fit the SES or Phoenix aluminum brackets.
I try not to get into these threads… Who will believe the guy who sells servos… But for what it’s worth, don’t you think if there was a better option I would be selling them? People on this forum are all about sharing information. If there were a “good” option it would be posted all over the place.
Robotics can be expensive, my wife will agree! so i would just try and research what it is you wish to do, while slowly saving up for the bits you need.
iv been working on a project for almost a year and im still in the construction stage! mean while iv been learning about programming, fabricating, etc.
Yeah I hear you all, I guess id just wanna buy all this crap at once and struggle with it a while… looks like im going to be diving head first into this project just for '$hits and grins really" something ive always wanted to build ever since lynxmotion was selling the yellow robots from a long long time ago.
I guess bite the bullet 12 of these 645’s and 6 of the 475’s and be done with it.
Once I get all my parts im pretty sure i’ll have a billion questions about doing stuff, I thought I would start small and program 1 leg to do something then venture on to more limb’s… hopefully integrating a futaba RC receiver into a basic stamp and the ss32 would be pretty simple code wise…
OK so like I have never programmed a basic stamp before let alone built one of these robots but … well maybe I am thinking about this too complicated but is it really simple to code?
once you instruct the atom to send code to the ssc32 to move servo1 will the atom/ssc32 be able to move onto the next command?
lemme see if i can put my idea down so it makes sense
ssc32 move servo1
ssc32 move servo2
will servo2 immediately move after the ssc32 has told servo1 to move to a specific position?
if these is the case is all walking just a sequence of possibly 18 servo movements? “phoenix” I guess to be stupid for a second here how come all this IK is being figured out for the phoenix it seems to me that there would simply be ratios of movements that can be calculated so that the outer most leg would stay vertical based on the internal movements of the 2 inner servos … i guess this sounds a lot like what IK is although im not sure why the actual angle values are necessary?
on a side note, i see all these different gate terms used 3 leg walk triangle theirs various others, how many different types of walks"gates" are there used for the phoenix?
in a sence the servos will move at the same time… giving the command is correct!
also guessing you have used the correct setup from board to pc!?
The easiest way to test the controller is to use the Lynx SSC-32 Terminal.
first we must have the servo connection to the board, and will look something like this…
Then click on the terminal window so you can type the following into it.
#0 P1500 #1 P1500
<- (This means hit Enter.)
You should notice both servos are holding position in the center of their range. The LED
is also no longer illuminated. It will now only light when the controller is receiving data. need to set a delay… (T)
Type the following:
#0 P750 #1 P1000 T3000
You should notice servo 0 moving CWslowly and servo 1 moving CCW a bit faster. They
will arrive at their destination at the exact same time even though they are moving
different distances.
Now to test the Query Movement Status. Type the following:
#0 P750
Then type the following line. This will make the servo move full range in 10 seconds.
[code]
#0 P2250 T10000
[/code]
While the servo is moving type the following:
[code]
Q
[/code]
When the servo is in motion the controller will return a "+". It will return a "." when it has
reached its destination.
To experiment with the speed argument try the following:
[code]
#0 P750 S1000
[/code]
This will move the servo from2250 to 750 (around 170°) in 1.5 seconds.
Next try typing the following:
[code]
#0 P2250 S750
[/code]
2250uS-750uS (travel distance)
1000uS/Sec. (speed value) = 1.5 Sec.
This will move the servo from750 to 2250 (around 170°) in 2.0 seconds.
Speed values above around 3500 will move the servo as quickly as the servo can move.
i hope this helps. im sure someone will rescue you from this jargon!! the best thing to do is study the code. ill send you a code to look over, check your PM!
likwidchz, Sorry to be the bearer of bad news, but no it’s not easy to program for a robot like the Phoenix. The way Xan has done it, with the IK method, provides the most accurate movements. It’s really required to get this level of accuracy and performance. My advise to you would be to build the Phoenix and use Xan’s program. Then you can get immediate satisfaction, while you work on understanding and eventually modifying the code to suite your likes.
I in fact do not even have my phoenix yet, or servos or ssc32 or bot board
pheonix should be here sometime this week, ebaying 6 hs-475’s add 12 HS645’s
I’m just trying to mentally prepare for this dive head first into 3 feet of water bit…
It was just a question about how much code it takes to get to have the phoenix take 1 complete step.
was there any place I can read about the various types of gate’s? i see many types of this
