Mindstorms MindCuber RI Rubik Solver

[Legodad_1999]

My son has built the MindCuber RI Rubik Solver for a school science project. It’s the first time we have used this Lego and the first time we’ve ever coded anything! 
 

We’ve followed the instructions of David Gilday here: 

https://mindcuber.com/mindcuberri/mindcuberri.html
 

but we can’t get it fully working.
 

We’ve followed the instructions to the letter but once the code is installed the scanner moves forward and back once and the central motor then spins endlessly. 
 

Any help would be very much appreciated.

 

Thank you 

 

[schraubedrin]

Hello, i don't have the knowledge with mindstorms or this model, but i think the other experts on this forum might have an easier time helping you with more information:

What debugging steps did you take:
- checked the mechanics, does everything work as expected?
- checked correct function of each sensor input, e.g. do you get the expected sensor value in the program when a blue square is in front of the sensor?
- where in the code does the error occur, e.g. what condition isn't being fullfilled for the loop to be exited?

A video of the problem and the movements up to this point might be useful as well.

That seems like a good and fun project, i wish you good luck and much fun getting it to work 
 

[Legodad_1999]

Thank you. Is there a way to share a video given the max file size is 100kb? Sorry I’m new to this 🙂

 

[2GodBDGlory]

27 minutes ago, Legodad_1999 said:

Thank you. Is there a way to share a video given the max file size is 100kb? Sorry I’m new to this 🙂

 

You'd have to upload it somewhere else (YouTube, etc.), and embed the link here. The same goes for any images, which would be to be hosted somewhere else

[Legodad_1999]

amazing thanks.

 

here’s the link

the latest position is the sensor moves forward once and the side arms move out and in and then stay in a closed position as per the video. 
 

we have rebuilt the whole thing to check for any errors. We have also calibrated each motor. And we did a system wipe and update on the robot itself. 
 

Each motor is working. We’ve even had the central spinning motor working. 
 

but whatever we do it just reverts to the position on the video. 

We even took the side arms off and reconstructed them at a different angle but as soon as we ran the program, the arms reverted to the position again as shown on the video. 

There are no error messages when we have inputted the code. We are stuck! 

 

 

 

[IAssemble]

Please ask for support on the MindCuber Facebook page and I will do my best to help. David Gilday

4 hours ago, Legodad_1999 said:

amazing thanks.

 

here’s the link

the latest position is the sensor moves forward once and the side arms move out and in and then stay in a closed position as per the video. 
 

we have rebuilt the whole thing to check for any errors. We have also calibrated each motor. And we did a system wipe and update on the robot itself. 
 

Each motor is working. We’ve even had the central spinning motor working. 
 

but whatever we do it just reverts to the position on the video. 

We even took the side arms off and reconstructed them at a different angle but as soon as we ran the program, the arms reverted to the position again as shown on the video. 

There are no error messages when we have inputted the code. We are stuck! 

 

 

 

If the arms stop in the middle like that there could be one of a number of issues including:

1) the motors are mounted backwards compared with the build instructions - the black "bush" connected to the motors should be at the front (I think this is correct in your video but it is hard to be sure)

2) the motors are connected to the wrong ports in the hub - please check the cables shown in the build instructions. As looking toward the face of the hub from the front, the left tilt motor should be connected to port F and the right motor tto port B.

Please check the buidl instructions carefully and let me know if wither of these points help.

Thanks

David

And please add all the elements shown in the build instructions. Some may look like they are for decoration but are functional. In particular, the bushes above the hub on either side of the scan arm are designed to hold the cables away from the scan arm so it can move freely. Please make sure the cables are routed exactly as shown in the build instructions including the color sensor cable which should be under the beam across the top of the hub.

Thanks

David

[Legodad_1999]

Wow the main man himself! My son is thrilled with this. Thanks very much David, we’ll get stuck into this tonight and any further issues we’ll jump on the MindCuber FB page. 

[Legodad_1999]

It works!!!!
 

We had two cables in the wrong ports! Also we had one of the blue pegs missing which meant the sensor wasn’t able to go out as far as it should. Simple fixes and now working great. 
 

Thank you so much. 

[IAssemble]

2 minutes ago, Legodad_1999 said:

It works!!!!
 

We had two cables in the wrong ports! Also we had one of the blue pegs missing which meant the sensor wasn’t able to go out as far as it should. Simple fixes and now working great. 
 

Thank you so much. 

That is great to hear. Thanks for letting me know. You and your son are welcome.