Everything Has Gone Wrong! Safe Cracking Robot - Part 3

I'm continuing work on trying to open my brother-in-law's safe by building a robot. I don't what's inside the safe, but based on all the bad luck I've run into with this project my guess is cursed pirate treasure.

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[FrankGraffagnino]

you shouldn't feel disappointed. this is how fulfilling projects go. if it was easy, it wouldn't be fulfilling and everyone would do it.

[RandomBogey]

You’re going to go through all this effort and in the end, the only thing in the safe is going to be the piece of paper with the combination. Then, BIL will suddenly remember he never had a chance to put anything inside before he forgot the combination…

[Larock-wuuu]

Not even slightly disappointing! Thus is just real-life engineering. Keep up the great work!

[TheHookUp]

This is definitely my favorite YouTube mystery safe series. I've been watching intently with each release.

[toddfisher]

don't give up - solving real problems is actually really hard keep it up!

[mfx]

Just use a closed loop stepper (which is what I thought the original motor was) you do need to make sure the pulse buffer in the motor driver is empty before you command a new move but the driver will either have a simple output to indicate that or you can put in a short delay between moves to allow the buffer to empty.

[microcolonel]

I could tell that the pressure on the handle was going to be an issue. Pneumatics are nice because you can just give it the maximum force that you are comfortable with (regulated with a pressure regulator), and actuate with that both ways.

[danil]

Commenting to support the channel and the project.

[HaloWolf]

Don't feel bad. Those safe engineers are feeling the love!

[TonyVirelli]

When you get this all squared away, please put together a kit or PDF of how to build this. I would pay for it. A lot of people in the #locksport community would as well!

[EnezReyiz]

Have you ever thought about recording the sound of each combination and make some analysis upon them? If not all combinations maybe only varying certain decimals.

[greatwhitenorthcanada]

I am working on a similar project for my safes, but am using a closed loop servo. The other this is that a S&G dial actually locks up when retracted, so no need to test handle until dial is locked.
I'm pretty handicapped when it comes to programming, so it is slow and tedious. I have about 10 different types of safes, so always looking for a better way. Always good seeing someone who is much better, and following their led. Keep up the great work!

[JonathanRansom]

You're obviously right, it's pirate treasure.

[H...]

Something like the misfit tech servo stepper might simplify things for you. It uses a small magnet glued to the back of the shaft as feedback, and the board bolts straight to the back of the motor. It takes the same step/dir signals as a stepper, has an "error" pin that goes high if thr motor stalls, programable current and microstep increments.

No affiliation, i just use them on the cnc at work and they would replace th whole stack you have on the back of the stepper, plus simplify your code.

[danielesilvaggi]

I think this is a great idea. I once had a combination lock on a locker in my garage I had forgot the combo to and sat there for a few hours a night for 2 weeks and many beers till I finally got it. I would rather use your way.

[FishersShop]

Oh man! You're SOOOO close! This has been such an awesome project. I know how frustrated you must be, but as a viewer, this has sure been a lot of fun to watch thus far.

[nikolasengelhard]

Was there a specific reason why you wrote your own code to read the encoder pulses? This is a standard task so there are already well tested libraries.

[locomotioncreations]

I was excited to see you get into the safe this time, but now I'm gonna be even more excited when you get it next time! Love the tenacity and hearing about your lessons learned. Great project

[OliverWoodphotography]

I love these clever and creative engineering solutions.

[Chris-bgmk]

Always design in a diode and fuse to prevent reverse or over voltage damage. Some designs I put a full bridge rectifier for DC input and then input polarity doesn’t matter.