Lego Mindstorms NXT 2.0 Tilted Twister Rubik's Cube Solver isn't working.?
I built the Tilted Twister, an NXT Rubik's Cube Solver, with Lego Mindstorms 2.0. The robot scans okay, but I don't think it scans all the sides. Afterwards, it doesn't calculate a solution. It does nothing. Can anyone please help me? I would greatly appreciate it.
Hi John,
First make sure you have followed the building instructions at http:tiltedtwister.com correctly.
The robot performs the following steps:
1: Wait for a cube to solve.
The display should read "GIVE ME A CUBE".
The ultrasonic detector detects when you put the cube in the cradle.
It says Thank you and writes "THANK YOU !" on the display, and moves on to the next step.
If the ultrasonic sensor by any reason does not detect the cube, you could press the orange center button to continue.
2: It scans all six sides
(it will tilt the cube 5 times).
3: It resolves the colors.
The display reads "RESOLVING COLORS" and after a few seconds it will read "Center colors...", "Corner colors..." and last "Edge colors...".
If it failed resolving the colors it will say Sorry and the display will read "SORRY Can't resolve colors".
If this is the case it could be caused by incorrect position of the color sensor. Try to move the sensor a bit up or down.
It could also be caused by an incorrect cube. If you have dismantled a cube and assembled i again, it may be unsolvable.
Or if you have another cube that is not an original Rubik's cube.
4: It calculates a solution.
In fact it calculates three solutions and picks the shortest.
The display should read "SOLVING Solution 1" and it plays short beeps with increasing pitch while it calculates the solution.
After a few seconds it should do the same for "SOLVING Solution 2" and "SOLVING Solution 3".
5: It executes the moves by turning, twisting and tilting the cube
when it's done it says "Game Over".
I hope this will help you to find where the problem is.
Best regards
Hans
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