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Topic: Rubik's cube Robot solver (Read 72225 times) previous topic - next topic

benbowman

the arduino code off post #18

kas

The bip() function is included in this code, your Copy/Paste was not accurate enough   ;)
The complete code including cube.h is located at Post #43


benbowman

thanks kas!!
the codes compiled correctly, ill set my solver tomorrow and hopfully video its first 'solve', ill also upload my frame files soon  :)

thanks so much kas

demirell95

Everything is right
But it gives such an error
I dont understand ?


lampel

Hello all ,
i have a few question before buying the servos :
1. do you need different servos for the pinch / Wrist servo ?, can i buy the same 4 servos ?
2. on post #226 kas said that he liked Towerpro MG995 servo but if i look at the DataSheet :
    "This servo can rotate approximately 120 degrees (60 in each direction)" ,
    on other posts you say make sure servo can do a full 180° so i am confused
3.maybe a dumb question but i want to make sure : when you say pick a servo that can do a full 180° ,
   do you mean 90° in each direction??
4. i cannot find the suggested HITEC HS422 servo to buy , do you have another suggestion
   for a full 180 degree motor ? a full 180° servo i find seems to be very low Torque , whats the minimum Torque
   for cube rotation ? i dont think ANY 180° servo is good (see the cheap arduino starter kit servo SG90)



Thanks lampel

kas

#290
May 16, 2017, 10:40 pm Last Edit: May 17, 2017, 06:53 am by kas
Quote
Everything is right
But it gives such an error
I dont understand ?
Communication with Arduino is not established

Please respond to my post #267
We need to validate both serial communication and cube moves



kas

#291
May 17, 2017, 08:01 am Last Edit: May 17, 2017, 05:04 pm by kas
Hi lampel

1 - No, Yes
2 - My 995's are modified for continuous rotation, can't check this important feature for wrist servo's
3 - Yes (no dumb question  ;) )
4 - HITEC HS422 seems to be widely available
     Torque won't be an issue provided you choose a quality Cube (see post #1)


lampel

Thank you kas!

2. Mybe off topic but how do you modify 995's  for continuous rotation? ,
    can you modify any servo  for continuous rotation? ,
    so why buy a full 180° servo if i can modify a servo ,
    are there any disadvantages for this modification?

Thanks lampel

kas

Continuous rotation servo's are used as DC motors with integrated drivers
 - myServo.write(0) is full backward
 - myServo.write(90) is zero RPM
 - myServo.write(180) is full forward

They can't be used for this project
I currently use them for a BB8 bot, sorry for the confusion
Most servo's can be modified for continuous rotation, search on YouTube for directions

You really need a full 180° servo for the wrist, the Hitec HS-422 is one of those
You can probably find it on e-bay for less than 10 bucks shipped




sirnikop

Hi kas,
I can't use a 3D printer or a laser cut machine to create grippers... Is it possible to make them handmade? Or is there another solution?
And what does it mean that the robot is semi autonomous?
Thank you

kas

#295
May 17, 2017, 10:26 pm Last Edit: May 17, 2017, 10:28 pm by kas
Hi kas,
I can't use a 3D printer or a laser cut machine to create grippers... Is it possible to make them handmade? Or is there another solution?
Hi sirnikop
You can't have them handmade, you will spend a lot of time and, at the end, it won't work
Why don't you find a Fab Lab near you, and have them CNC'ed, printed or laser cut ??
Otherwise come back to me, we will find a solution   ;)


Quote
And what does it mean that the robot is semi autonomous?
The webcam version is 'semi autonomous' and need to be connected to a PC
The Android version is 'self contained', very convenient for exhibiting at Maker Faire


sirnikop

Thank you for your reply.
I could try to order it on the net, if it doesn't cost too much... Which size it should be? A5?

sirnikop

Ok, I've found a FabLab in my city, problem solved  :) .
Which file do I need to create it?

kas


kas

I have two Laser cut grippers sets available for a low price
Should you be interested, just send me a PM








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