Society of Robots - Robot Forum
Mechanics and Construction => Mechanics and Construction => Topic started by: E.Man.Lava on January 20, 2008, 03:52:56 PM
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I was building the 50$ robot recently and the servos i bought didnt come with the black boxy things shown in the tutorial. I solved this by hot glueing the servos to the chassis and then putting tape over the servos. Are there better methods than that to attach my servos to the chassis?
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velcro? IDK how strong it would be. good double sided tape will work
or make/buy some servo mounts
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I thought about that but decided that hot glue and tape might keep the servos in place more effectively :)
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yay finally hot glue gets some recognition!!
~smash
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yay finally hot glue gets some recognition!!
~smash
hot glue is terrible for mounting , avoid it
nuts and bolts is the way to go
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I solved this by hot glueing the servos to the chassis and then putting tape over the servos.
lol soooo ghetto . . .
double sided tape will work
simplest, fastest, and it will never fail
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[quote/]simple fastest and will never fail[quote/] lol it will if you cover it in crap! naa seriosly. with double sided tape doesnt it wear down? like really easilly?
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[quote/]simple fastest and will never fail[quote/] lol it will if you cover it in crap! naa seriosly. with double sided tape doesnt it wear down? like really easilly?
not really , well I dont know what double sided tape you are talking about , not the cheap kind , the slightly less cheap kind ,lol
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if the servo's are under the robot then the weight of the robot will actually push down on the tape and servo
EDIT- WOOT lol 999 posts
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lol ed has 999 posts!!!
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I'm so happy for him I wish I had 999 posts. :'( ;D
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you guys don't keep 3/4" aluminum angles handy?!?!
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i just bought a 1" x 1" x 8' aluminum angle bar from Lowes and cut it to little sections and drilled holes. Way more professional!! ;D ;D
bane.
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you guys don't keep 3/4" aluminum angles handy?!?!
no i just use servocity's universal sensor mounts
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or use lynxmotion's EZ mount servo brackets (lighter and cheaper)
however, making your own is a little more work but so much cheaper :D
bane
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uhhhhh
idk if im being stupid but since servos only turn one direction when they're modified for continuous rotation, how would that work for a differential drive
??? ???
doesnt one side of the robot need to turn clockwise and the other anti-clockwise for the robot to go straight? ???
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uhhhhh
idk if im being stupid but since servos only turn one direction when they're modified for continuous rotation, how would that work for a differential drive
??? ???
doesnt one side of the robot need to turn clockwise and the other anti-clockwise for the robot to go straight? ???
that is a great question tjpark! many people would have disregarded that issue and realized at the last second .
But luckily for us modified servos can move in both directions , as can all servos
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how come servocity sells "anti-clockwise" direction as an optional modification for $10-20 more if they turn both ways in the first place? weird...
well anyway would i need to set up servo reversing on 1 of the channels so i can press forward on both of the sticks on the transmitter and the robot will go forward (w/ 2 servos)? or is it supposed to be all mixed up (press up on stick, down on other stick) and i should get used to it??
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hmm yes i thought that they were contineus before i checked that out..WTF??
~smash
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how come servocity sells "anti-clockwise" direction as an optional modification for $10-20 more if they turn both ways in the first place? weird...
well anyway would i need to set up servo reversing on 1 of the channels so i can press forward on both of the sticks on the transmitter and the robot will go forward (w/ 2 servos)? or is it supposed to be all mixed up (press up on stick, down on other stick) and i should get used to it??
im guessing it means reverse pulse codes ? anyone here know about it ?
so i would assume you get one anticlockwise and one clockwise servo( maybe , you'll need to check it out) and then you would press both up
or perhaps have a microcontroller control the servos
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uhm, does that mean i need to cancel my order RIGHT NOW and change one to anti-clockwise?
i thought RC cars were SO EASY to make, like the $50 one, and that guide mentions NOTHING about this. i guess the admin magically did it while he built his robot? like channel reversing or a way to modify to anticlockwise rotation?
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ok so with a microcontroller you could give the servos opposite pulses, and if you connect a r/c receiver to a microcontroller then you could control it
Im guessing the anticlockwise has opposite pulses, im not a 100% sure
also i Think , though im not sure , that if you are going to modify the servos anyways , you could turn the pot on one of the servos so that a pulse of 100 will make it go forward instead of backward
call them and find out what anticlockwise means, and please post your results of what it is.
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OK tjpark11 I GOT IT , IT JUST POPPED INTO MY HEAD!!! :D
BUY THE SAME SERVOS ( regular clockwise for both)
then when you get the servos , open one of them up and reverse the wires going to the motor . There you got one going clockwise and one going anticlockwise on the same pulse!
I just thought of this now and I'm going to be doing this for all my servos in the future. After I modify them , ill switch the wires of one of them so I have one universal pulse for forward and one for backward.
ADMIN PUT THIS IN YOUR SERVO MODIFYING TUTORIAL!!!
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with double sided tape doesnt it wear down? like really easilly?
actually, my main complaint about it is that its really hard to remove . . . its holds *too* well . . .
uhm, does that mean i need to cancel my order RIGHT NOW and change one to anti-clockwise?
i thought RC cars were SO EASY to make, like the $50 one, and that guide mentions NOTHING about this. i guess the admin magically did it while he built his robot? like channel reversing or a way to modify to anticlockwise rotation?
For RC, the controllers I use have reverse switches (nothing magic or difficult to do). And sometimes I just push reverse on a joystick for a servo to go forward, no problem for me . . . You can also buy what is called a 'servo programmer' to reverse a servo.
And for robots with microcontrollers, I just inverse the PWM signal I send using software.
then when you get the servos , open one of them up and reverse the wires going to the motor . There you got one going clockwise and one going anticlockwise on the same pulse!
interesting idea . . . this will also work!
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i called servocity and they said you can pay $10 so that the default turning direction will be anticlockwise, so i guess it's just a convenience thing. yeah so, it would be very good to mention servo reversing and the idea that airman presented into your guide, it would help a lot.
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well if you use my method then you don't need to pay an extra 10 bucks to change the default direction
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tjpark1111, are you sure your remote doesn't have reverse switches?
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i ordered a laser 4, it definitely has servo reversing. it's just i didnt realize since im a noob. i got very frustrated ??? it'd be good to mention servo reversing in the RC robot guide, and stuff about positive/negative shift and single/dual conversion.