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Posted: 5/24/2019 5:05:42 PM EDT
[#1]
Damn, you guys get out early.
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Posted: 5/24/2019 6:07:34 PM EDT
[#2]
Still no pic of the door attachment carriage?
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Posted: 5/27/2019 1:04:24 PM EDT
[#3]
Update 5/27
Well, our Robotics student just texted me asking to get into the High School to work on the project. 
He was successful in getting the electronics package installed on Friday, but ran into a little problem with the chain. He said the way the door was closing it was putting a little slack in the chain and it got caught up in the sprocket, breaking the already cracked mount. He did get the limit switches installed and apparently correctly coded in the program. 
He printed a new one over the weekend and is now working to install it a bit differently. He plans on flipping the motor upside down. He thinks this will take care of the problem. We will have to wait and see how this works out. I'll grab some photos in a bit, when I won't be in his way. |
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Posted: 5/27/2019 3:20:18 PM EDT
[#4]
Quick video of the door after the chain tensioner was repaired with new springs, and the mount was swapped.
We had one more little glitch. As he was turning the system on and off he forgot that the motor was hooked up in a way that the default was to come on as soon as power comes on........before the program with limit switches takes affect. 
We broke another set of springs.  He plans on printing a latch to attach the chain to the door so that if this happens, it just breaks away and dosen't break another set of springs, or the chain.  Marine One Project |
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Posted: 5/27/2019 3:28:43 PM EDT
[#5]
How are you controlling motor where it's power on at boot?
Be safer to invert that logic. Power outages could get expensive in time and parts. |
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Posted: 5/27/2019 3:34:36 PM EDT
[#6]
Quote HistoryQuoted:
How are you controlling motor where it's power on at boot? Be safer to invert that logic. Power outages could get expensive in time and parts. He says he's going to take care of it. 
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Posted: 5/27/2019 3:50:42 PM EDT
[#7]
Quote HistoryQuoted:
He and Top_Men were rattling off something about switching pins or something. He didn't seem to think it was going to be a big deal to change it so it comes on as "off". He says he's going to take care of it. Quote HistoryQuoted:
Quoted:
How are you controlling motor where it's power on at boot? Be safer to invert that logic. Power outages could get expensive in time and parts. He says he's going to take care of it. Many hardware bugs can be fixed in software and vice-versa. From Motor drivers to Intel CPUs, if it's already built, a clunky software patch will get around a hardware/silicon defect.
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Posted: 5/30/2019 10:51:07 AM EDT
[#8]
Quote HistoryQuoted:
Quick video of the door after the chain tensioner was repaired with new springs, and the mount was swapped. We had one more little glitch. As he was turning the system on and off he forgot that the motor was hooked up in a way that the default was to come on as soon as power comes on........before the program with limit switches takes affect.
We broke another set of springs. He plans on printing a latch to attach the chain to the door so that if this happens, it just breaks away and dosen't break another set of springs, or the chain.  https://www.youtube.com/watch?v=IyrS6N9dDKY I can't see that lasting more than a few weeks worth of actuations before the door comes off and seriously injures a student walking to class. Pin the door at 3/4 open, stand the crewmember in it and call it a |
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Posted: 5/30/2019 1:33:10 PM EDT
[#9]
Quote HistoryQuoted: Wow! I can't see that lasting more than a few weeks worth of actuations before the door comes off and seriously injures a student walking to class. Pin the door at 3/4 open, stand the crewmember in it and call it a
We think we've got the door actuator and movement pretty solid. The rocking you can see is just the carriages on the track. Our biggest problem the last few days has been I Tegra ting the different programs together into a single working program. I think they are dealing with a few issues. They may need a relay to keep the motor from coming on when pouring up. They also managed to fry the Raspberry Pi. They may have also fried something that was working to control the lights. It's been a rough few days. Top_Men was called in today to see if they could trouble shoot the problems together. I'm going over there in a few to see if they've burned anything down yet.
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Posted: 5/30/2019 1:49:09 PM EDT
[#10]
Are you using only 3.3v logic level signals into and out of the Pi? Might need a 3.35v level shifter if the motor driver board is 5v logic.
Or opto-isolators for he power side. |
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Posted: 5/30/2019 2:01:40 PM EDT
[#11]
Quote HistoryQuoted:
Are you using only 3.3v logic level signals into and out of the Pi? Might need a 3.35v level shifter if the motor driver board is 5v logic. Or opto-isolators for he power side. Quote HistoryQuoted:
Are you using only 3.3v logic level signals into and out of the Pi? Might need a 3.35v level shifter if the motor driver board is 5v logic. Or opto-isolators for he power side. No the hat is designed for a raspberry pi so it uses 3.3V. Optocouplers won't help us at all since we aren't having a problem with interference. And he's using a mosfest for the lights which is a kind of electrically controlled switch. The one he is using is a variable resistor so the higher the voltage the lower the resistance is so the brighter the lights are. The lower the voltage the higher the resistance but we checked the voltage off of the raspberry pi and it's outputting .4V when turned to low. I would have to look at the data sheet for the mosfest but that might not be enough to turn off the mosfest completely, which would describe the behavior we are seeing. If the replacement mosfet doesn't work, he might have to do a redesign |
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Posted: 5/30/2019 2:23:16 PM EDT
[#12]
Quote HistoryQuoted:
Here's what he just texted me. Quote HistoryQuoted:
Quoted:
Are you using only 3.3v logic level signals into and out of the Pi? Might need a 3.35v level shifter if the motor driver board is 5v logic. Or opto-isolators for he power side. No the hat is designed for a raspberry pi so it uses 3.3V. Optocouplers won't help us at all since we aren't having a problem with interference. And he's using a mosfest for the lights which is a kind of electrically controlled switch. The one he is using is a variable resistor so the higher the voltage the lower the resistance is so the brighter the lights are. The lower the voltage the higher the resistance but we checked the voltage off of the raspberry pi and it's outputting .4V when turned to low. I would have to look at the data sheet for the mosfest but that might not be enough to turn off the mosfest completely, which would describe the behavior we are seeing. If the replacement mosfet doesn't work, he might have to do a redesign |
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Posted: 5/30/2019 3:11:40 PM EDT
[#13]
Quote HistoryQuoted:
The logic pin driving the MOSFET shouldn't be left floating. Add a resistor from the pin to ground to pull the pin to ground state (0 V) when the signal is off. MOSFET's have extremely high resistance on the gate and won't bleed the signal level down sufficiently. Quote HistoryQuoted:
Quoted:
Quoted:
Are you using only 3.3v logic level signals into and out of the Pi? Might need a 3.35v level shifter if the motor driver board is 5v logic. Or opto-isolators for he power side. No the hat is designed for a raspberry pi so it uses 3.3V. Optocouplers won't help us at all since we aren't having a problem with interference. And he's using a mosfest for the lights which is a kind of electrically controlled switch. The one he is using is a variable resistor so the higher the voltage the lower the resistance is so the brighter the lights are. The lower the voltage the higher the resistance but we checked the voltage off of the raspberry pi and it's outputting .4V when turned to low. I would have to look at the data sheet for the mosfest but that might not be enough to turn off the mosfest completely, which would describe the behavior we are seeing. If the replacement mosfet doesn't work, he might have to do a redesign
They say it's coming together now. They had everything but the door intergratedinto tdd he program a few minutes ago. Lights, sound and motion. |
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Posted: 5/30/2019 8:48:25 PM EDT
[#14]
This guy came to town for a memorial day concert. Put her down on the road. Was fun watching that through the windshield of my truck. Crew was cool to talk with too. I hadn't been around a blackhawk in a while but looking at this one really reinforced how well you guys fit with your model.
 Attached File Attached File |
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Posted: 5/30/2019 8:59:17 PM EDT
[#15]
Quote HistoryQuoted:
This guy came to town for a memorial day concert. Put her down on the road. Was fun watching that through the windshield of my truck. Crew was cool to talk with too. I hadn't been around a blackhawk in a while but looking at this one really reinforced how well you guys fit with your model. https://www.AR15.Com/media/mediaFiles/181534/20190524_175238_compress_62_jpg-963603.JPG https://www.AR15.Com/media/mediaFiles/181534/20190524_190723_compress_2_jpg-963604.JPG |
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Posted: 6/2/2019 6:11:13 PM EDT
[#16]
Update 6/2
New parts will be here tomorrow. Robotics wanted an upgraded power source for the Raspberry Pi, magnetic switches to lesson the chances of problems closing the doors, and a replacement Raspberry Pi for the one we fried last week. Hopefully we can get it all finished up this coming week. We are going to get run out by the summer cleaning crew soon.
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Posted: 6/2/2019 7:05:05 PM EDT
[#17]
The dedication to completion is simply amazing.
Does this student have another year to go? It may get them involved prior to spring break on the next project. 
Damn good work once it did get going though. Excellent work ethic and commitment to excellence. He should get an award, like having to do next year's whatever it turns out to be, even if he's not in High school. |
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Posted: 6/2/2019 7:12:31 PM EDT
[#18]
Quote HistoryQuoted:
The dedication to completion is simply amazing. Does this student have another year to go? It may get them involved prior to spring break on the next project.
Damn good work once it did get going though. Excellent work ethic and commitment to excellence. He should get an award, like having to do next year's whatever it turns out to be, even if he's not in High school.
He's a great student and doesn't like leaving things unfinished. He got really busy the last couple weeks of school, and that kept him from getting as many hours in as he would have liked. |
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Posted: 6/4/2019 8:42:40 PM EDT
[#19]
New parts are waiting to be installed, but it didn't happen today.
A better view of the tensioner that Robotics custom built. 
We also still don't have the breakaway attachment part for the chain. It is still just wired to the structure. 
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Posted: 6/4/2019 8:45:45 PM EDT
[#20]
Going to add a Buckingham Palace now?
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Posted: 6/8/2019 12:49:52 PM EDT
[#21]
Like we need anything more to try to finish....
It's a Saturday work day for Robotics. He has a job during the week keeping him from important stuff like our helicopter. I just dropped off magnets for the switches, and he thinks hes close to having everything done. We will see. He said hes also going to try to add in some rotor noise to the sound system. Hopefully the programming goes well today. |
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Posted: 6/9/2019 3:20:15 PM EDT
[#22]
Update 6/9
Looks like we will need at least another day.
Robotics worked almost all day yesterday and did get the new magnetic sensors installed and working. He says he has everything but the new connection point piece done, and a little bit of programming left. He plans on coming in Monday evening after work to see if he can finish up. The bottomed sensor is the new magnetic one. 
The magnet is installed on the side of the door here..... 
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Posted: 6/9/2019 3:25:54 PM EDT
[#23]
Quote HistoryQuoted:
Update 6/9 Looks like we will need at least another day.
Robotics worked almost all day yesterday and did get the new magnetic sensors installed and working. He says he has everything but the new connection point piece done, and a little bit of programming left. He plans on coming in Monday evening after work to see if he can finish up. The bottomed sensor is the new magnetic one. https://i.imgur.com/6fCUnM4.jpg The magnet is installed on the side of the door here..... https://i.imgur.com/TTFdmmn.jpg I have no clue what is working and what isn't working. If the carrier is disconnected from the door, can you side it by hand from closed to open and back with no resistance? i.e. No problems with track/rollers? If inertia, run motor at half speed, or put magnetic proximity switch about 1" in front of where it actually needs to stop closing so it coasts into the final limit switch? Explain problem that's going on, is there a mechanical issue that's being worked around in software, or the other way around? |
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Posted: 6/9/2019 3:29:31 PM EDT
[#24]
Quote HistoryQuoted: Is the door working properly except over-running when it closes? Too much inertia so when motor stops, door slams and tweaks mounts? I have no clue what is working and what isn't working. If the carrier is disconnected from the door, can you side it by hand from closed to open and back with no resistance? i.e. No problems with track/rollers? If inertia, run motor at half speed, or put magnetic proximity switch about 1" in front of where it actually needs to stop closing so it coasts into the final limit switch? Explain problem that's going on, is there a mechanical issue that's being worked around in software, or the other way around?
He says he just needs to finish the 3D printed breakaway connection part for the chain to the door. ...."and a little programming".  I haven't seen it work with the new sensors so you know as much as I do.
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Posted: 6/9/2019 6:19:50 PM EDT
[#25]
Robotics/programming kids are funny. They make the 10 minute estimate I give my wife for doing a project seem accurate.
Somehow they have enough time to program the Windows blue screen of death as the screen saver though. Almost had to use the AED on the programming mentor for that one. |
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Posted: 6/9/2019 6:24:55 PM EDT
[#26]
Next year do a 1,000 scale model of The Great Wall from GoT.
It might go quicker.
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Posted: 6/9/2019 6:50:02 PM EDT
[#27]
did someone say next year?
 USS Wyoming - Guide 004 (Human Voice) |
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Posted: 6/9/2019 7:27:45 PM EDT
[#28]
Quote HistoryQuoted:
Robotics/programming kids are funny. They make the 10 minute estimate I give my wife for doing a project seem accurate. Somehow they have enough time to program the Windows blue screen of death as the screen saver though. Almost had to use the AED on the programming mentor for that one.
It's funny communicating with programmers. None of them really want help. They want to figure it all out on their own. It's the reverse of most students in school. When they done any help, very few can actually offer useful help. I am definatley not one of them.
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Posted: 6/9/2019 9:00:15 PM EDT
[#29]
Guns,
Your dedication to your students is most remarkable. It’s always a treat to watch these projects develop. Keep doing amazing things with those kids! |
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Posted: 6/10/2019 9:53:38 PM EDT
[#30]
Ladies and Gentlemen, I've seen it! It lives!
I just got back from letting Robotics in to work on the project again tonight. I got a quick update from him and a demonstration.  It all works!!! Motion activation, lights flashing, tail rotor moved, and the door open and close perfectly. He's got it slowed down and the magnetic switches were working great. He's working on making the music come on every 5th time. It will fill in randomly with rotor blade sounds. He was going to do that tonight. I'm stoked! I'm hoping to get some video without the lift in the middle of the room soon. Maybe tomorrow.
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Posted: 6/11/2019 1:50:43 AM EDT
[#31]
That's awesome news!
Impressed by the dedication and drive shown, he'll go far! |
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Posted: 6/11/2019 2:39:58 AM EDT
[#32]
Quote HistoryQuoted:
Ladies and Gentlemen, I've seen it! It lives! I just got back from letting Robotics in to work on the project again tonight. I got a quick update from him and a demonstration. It all works!!! Motion activation, lights flashing, tail rotor moved, and the door open and close perfectly. He's got it slowed down and the magnetic switches were working great. He's working on making the music come on every 5th time. It will fill in randomly rotor blade sounds. He was going to do that tonight. I'm stoked! I'm hoping to get some video without the lift in the middle of the room soon. Maybe tomorrow.Im excites to see this come to fruition |
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Posted: 6/11/2019 3:01:58 AM EDT
[#33]
Quote HistoryQuoted:
Ladies and Gentlemen, I've seen it! It lives! I just got back from letting Robotics in to work on the project again tonight. I got a quick update from him and a demonstration. It all works!!! Motion activation, lights flashing, tail rotor moved, and the door open and close perfectly. He's got it slowed down and the magnetic switches were working great. He's working on making the music come on every 5th time. It will fill in randomly rotor blade sounds. He was going to do that tonight. I'm stoked! I'm hoping to get some video without the lift in the middle of the room soon. Maybe tomorrow.
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Posted: 6/11/2019 11:35:01 AM EDT
[#34]
Quote HistoryQuoted:
Ladies and Gentlemen, I've seen it! It lives! I just got back from letting Robotics in to work on the project again tonight. I got a quick update from him and a demonstration. It all works!!! Motion activation, lights flashing, tail rotor moved, and the door open and close perfectly. He's got it slowed down and the magnetic switches were working great. He's working on making the music come on every 5th time. It will fill in randomly with rotor blade sounds. He was going to do that tonight. I'm stoked! I'm hoping to get some video without the lift in the middle of the room soon. Maybe tomorrow.
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Posted: 6/11/2019 11:35:58 AM EDT
[#35]
Quote HistoryAlso this. Would go great with the U-boat. Also rotating turrets and full broadside noises.
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Posted: 6/11/2019 11:37:20 AM EDT
[#36]
@guns762
Do you have any pics of the Uboat? |
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Posted: 6/11/2019 11:41:59 AM EDT
[#37]
Quote HistoryQuoted:
Ladies and Gentlemen, I've seen it! It lives! I just got back from letting Robotics in to work on the project again tonight. I got a quick update from him and a demonstration. It all works!!! Motion activation, lights flashing, tail rotor moved, and the door open and close perfectly. He's got it slowed down and the magnetic switches were working great. He's working on making the music come on every 5th time. It will fill in randomly with rotor blade sounds. He was going to do that tonight. I'm stoked! I'm hoping to get some video without the lift in the middle of the room soon. Maybe tomorrow.
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Posted: 6/11/2019 11:43:21 AM EDT
[#38]
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Posted: 6/11/2019 11:43:55 AM EDT
[#39]
sneak peek for you
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Posted: 6/11/2019 11:53:34 AM EDT
[#40]
Quote HistoryAll the rivets!
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Posted: 6/11/2019 1:00:47 PM EDT
[#41]
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Posted: 6/11/2019 1:03:39 PM EDT
[#42]
Minor update this morning. All the electronics, tools, and materials were cleaned up, but hes got a note out that says he is coming back tonight. I imagine hes still got a few program adjustments left. He had it unplugged so I didnt want to mess with it yet.
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Posted: 6/11/2019 5:31:39 PM EDT
[#43]
Thank you all
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Posted: 6/11/2019 9:54:05 PM EDT
[#44]
Ok, just got done letting Robotics back in for what he says is THE last time.
He says he's got a little modification for the code, and program. He said everything was working last night but the soundtracks weren't coming up as fast as he would like. He said it easy more than every 5x. He's going to get that adjusted. He said he had several helicopter sounds to go with the two soundtracks. I mentioned "Get to the Choppa," to him tonight, but he hadn't seen the movie.
Maybe he will surprise us.
I asked him about stopping the program so we could access the interior with the door open, as the door opens and then immediately closes. He showed me the limit switch on the interior door edge that will stop the program when pushed. Oh, that's what that is for. 
I will have to go back in next week to install our "crewmember" into the helicopter. He's been left out for now so he's not in the way. I'm not sure where we are going to get him placed, as the chain goes right through where he was going to stand, but I think we might be able to mount him on the metal door chassis that roles on the track. I'll also probably move the sensors at that time too so they aren't so visible.
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Posted: 6/11/2019 10:17:35 PM EDT
[#45]
Good job everyone
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Posted: 6/11/2019 10:19:59 PM EDT
[#46]
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Posted: 6/12/2019 8:14:06 PM EDT
[#47]
Great effort by everyone on this project. Looks amazing, and I'm looking forward to following next years project already
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Posted: 6/13/2019 5:25:57 PM EDT
[#48]
I just got back into town. Spent a couple much needed days up on the mountain. I need to go check on the VH-60 and see where we are at. Hopefully it's all done and ready for summer.
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Posted: 6/13/2019 7:07:28 PM EDT
[#49]
Well, little update. Motion is all there. We seem to be missing the sounds. I think getting the random selection is causing problems. I never got any sounds to play this afternoon.
I sent Robotics a messege. He may have an answer for me later. I think hes still at work. Here are a couple videos of it in action. It has a 2min delay after activation.  Marine One Project(2)  Marine One Project(1) |
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Posted: 6/13/2019 7:33:01 PM EDT
[#50]
Quote HistoryQuoted:
Well, little update. Motion is all there. We seem to be missing the sounds. I think getting the random selection is causing problems. I never got any sounds to play this afternoon. I sent Robotics a messege. He may have an answer for me later. I think hes still at work. Here are a couple videos of it in action. It has a 2min delay after activation. https://www.youtube.com/watch?v=3RAfQcOg60E
https://www.youtube.com/watch?v=rIJUVheZM8wWhat did the sub end up being limited to for its sound effects? I remember that becoming an issue with a teacher across the hall or something. Though you could buy a better motor, like Maxon with a good gear head for low speed on tail rotor for silent operation. That's the only thing I can whine about, but it probably can't be heard in typical ambient noise. Note: Maxon motors are about the best you can get, and the price tag matches. Otherwise, this has been an over the top amazing year, and the robotics student should be extremely proud. |
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