jesse66058

Have you seen the one of sheepo? http://www.sheepo.es...ni-gearbox.html Pretty compact if you ask me. He also has a bigger version of it, so don't worry!

@Zbjl Just realised a 4l bar is too long to work. 3 studs long is the maximum length. Otherwise there is no safe space for the bevel-gear to turn. (Maybe 3.5 studs is acceptable to prevent dismounting under high stress) I don't see any problem here. When you want to put 4 (working) bevel gears in it, you have to add a bar. When you add a bar, you mount it as last, which means you can install the bevels a the outer sides of the diff first, then add the other 2 and then mount the bar. Excactly the opposite pair to begin than in your drawings Next to that i came up with some new ideas to make the old diff fully compatible with the lego system. Just have to prove it's possible.

Count me in to! Maybe if we ask Efferman or Alasdair Ryan gently they want to help......

I don't get it, is it something like this? http://en.wikipedia.org/wiki/File:Simple_CV_Joint_animated.gif

I have bad news. When i started making my own i wanted to have it fully lego system compatible, but it's not. I sanded it down to excactly 1 stud: But the slack has improved between the bevel gear and differential which makes it after all useless. You can still use it when you sand it uneven down, but you have to make custom axles like x,8 studs + you can't use direct input of cv-joints anymore. Maybe another design could work which is not bigger than the insides of the open center frame.

Where is the outer ring in connection with?

This was what i had in mind: Acting different as this one:

My fault. I thought that from the picture the lower A-arms where not laid horizontal on the verhicle. thus lower than being horizontal. Next to that it looked like they were connected on a kind of ball-joint. So when bumped. The A-arm and linkage line up and 'push' the A-arms slightly backwards rotating on it's joint. Might make later an moc-up to view what i exactly mean. Talks easier :P The L shaped A-arms of the new Mustang do look like 1 piece.

Smart solution to support the lower A-arms, had to think a while about it how it would move. When bumped the A-arms slightly tilts backwards and gets a slightly shorter wheelbase?

This is perfect! I also was thinking about a new, stronger diff made of original lego parts, but you beat me way better! @ Mestari No, it's stuck. You can try it your own and see what happens. Althought it can be quite difficult to install. Edit: Took a closer look, but are those axles cut off? Looks from here like 3.5 studs long. Maybe you can install a lego 4l bar to stiff things up if you use original axles.

Ah, i see. Excuse me. Maybe another stupid question, but is there a material that can be printed air and/or liquid-tight?

RC wheel adapters, just genius! This combined with the 'Ultimate Wheelhub' from Nicjasno should give so many useabilities! But when it comes to that fake v6 cylinder, it's a nice concept but i don't think it's sufficiënt enough.

@ Efferman, If you shorten the joints to 1 stud at the end, would it make sense? An usefull application can be when the A-arms of a suspension may have a maximum size of 4 studs (use of part 6538c). When going bigger, the usefullness of this part will lower fast. (or not?)

Update: After i got Interface B working, there will be going 2 interfaces available for a dutch school as support of their technic education. There were 4 boxes, but only 3 9751. Still i can't complain :D For now the computer department is still searching for computers for educational purposes with a RS-232 port since new computers don't have them anymore and an available DOS computer. After that i'll be taking care to make 2 9751 work with the computers. The course with Interface B should be understandable for 12-13 yo. There is in the yearlessons a period where they teach automation, the idea was for the extra enthusiast kids to work with 9751 as extra next to their own lessons. Possibly i'll make an own topic about that later with more information. I'm still paining my head about interface A, i've found about 5-7 total! If i find atleast one DOS computer, then what? I still need to find the diskettes :( Forgot to ask a question: Some sets are equipped with a 'look-a-like' white spring, which functions has it since no axle could pass through it?

Amazing! I'm very curious to others experiences and ideas! I just did some tests with the rotationsensors. When programmed right, the biggest precision i could get from it was a tolerance of just 22.5 degrees!(I did 9 tests for good accuracy of the test) It just blew my mind. I only have no idea how i could print images with RoboLab. I saw PriNXT but i have to research that some more. Keep the amazing stuff going people!

I hope TLC doesn't mind me publishing RoboLab here. I'm just here to help people. *Instructions for using the Lego Dacta Interface B with newer OS's* ---------------------------------------------------------------------------------------------- These instructions are ment for LEGO 9751. They have been confirmed to work with Windows 7 (x86 and x64) To get your 9751 working you need RoboLab. The version has to be higher than 2.5.4 to support 9751. You can download a fully working copy here: https://www.dropbox.com/s/9dun44rpbnd806x/ROBOLAB254_PC_CD.zip You can use it portable aswell installing it on your PC. If needed a serial code has been included. ------------------------------------------- IMPORTANT NOTES: * If you get when opening the software for first use an error message: fantom.dll is missing/not found, install the LEGO NXT USB Driver to solve this problem here: https://www.dropbox.com/s/64kamo22z114f13/NXT_USB_Driver_120.zip * Some computers don't work well with RoboLab. You can solve this by right clicking the application -> properties -> compability and check: {disable visual theme's} {disable dekstop composition} and {run this program as administrator} ------------------------------------------- If you can run RoboLab you can close the program. Now we need to find and change our port to COM2. For some reason you can change it in RoboLab, but it still won't work. The standerd settings in the program we're using is LTI 1, which simply refers to COM2. Go to Start -> Control Panel -> Hardware and Sound -> Device Manager (right above). Search and open label: 'Ports (COM & LPT)'. Now you should able to see which number the port has 9751 is connected to. Right-click the correct Parallel Port -> Properties -> Port Settings. Check if these settings are right: Bits per second: 9600 Data bits: 8 Parity: None Stop bits: 1 Flow control: None Then click 'Advanced'. Now we are able to change our COM port number. Change it to COM2. (When COM2 is in use, reboot computer and/or determine what uses the port and change it to another port number). Press 'OK' on all windows opened. I advise to reboot the computer to make sure the changes have been applied. Make sure 9751 is powered on and connected. Open RoboLab. Choose 'Programmer' then Inventor 4 and open a random pre-made program. From here you can choose to make your own program (File -> New VI) or you could open an earlier made program. I wrote a simple example you can download here: https://www.dropbox.com/s/9s99xmgcwof14r3/Testprogram%209751.vi?m=(Open it with File -> Open) ------------------------------------------- IMPORTANT NOTES: * When there are no tools to use when making your own program, you can open them with: Windows -> Show Controls Palette and Show Tools Palette. * ONE VERY IMPORTANT THING IS TO BEGIN AND USE YOUR PROGRAM WITH THE RIGHT ICON!!!! In the Function Palette choose 'Control Lab Interface' (below) Your program you're writing is made in a different manner than for NXT and RCX. To find examples and instructions to make specific programs, click Help -> Show Context Help. Place your mouse on the icon you want to now more about. You can click in the Help windows for even more help. Here you can find instructions to use each symbol. Make sure you wrote your program in the 9751 way! ------------------------------------------- Happy Programming! * Shoutout to Azzeppa for finding the lost archives of the 9751! * 3-3-2014 Updated links

F*CK YEAH! I finally got it working! So far it worked for 100% with Windows 7 64 and 32 bit! Some minor changes have been made to make it work. If requested by people i can test it also in Windows 8. If anybody needs help. I'm pleased to help you! Well, let's continue on Interface A next week.

@ Dans lego Sheepo made one: http://www.sheepo.es...-live-axle.html If i mention right a 3-link setup with a simple panhard bar, something like the Ford Mustang has. Nicjasno made one aswell, but is a little bit big. I would also like to see some live axles setups like the Ford Mustang has for ideas. Another example: https://www.dropbox....Opel Suspension

VMWare was not competible with the next computer and i found out VirtualBox has no built-in support for Parallel input. So that's nog going to work for today. I got one step closer with RoboLab but it does not work fluent with Windows 7. I'm now stuck with sending commands to the interface. I literally did everything i could think of such as renaming ports in "Device Manager" aswell in Robolab but nothing worked. My program should be working as said in the help screen. What could it possibly be?

@DrJB My friend started to laugh very hard when he saw the card, even he was surprised by it. He told me some pretty amazing stuff from the past. About RoboLab,... Let's say the other black depths and a working serial i found by a trick It is very dissapointing to find out that many links are broken. Some could have been very usefull such as: http://www.legoengin...51 (Interface B Google Cache didn't helped either :( Coming up i'm trying ControlLab on a different computer where it probably should work. I still don't understand how 9-15 year old could work with the interface, it's somehow pretty complex at first try.

Well, it certainly did not went as expected: 1. I was not able to find any diskettes and without it, it's (almost) useless. The card from 9750 is not compatible with new computers. The slot aswell the 'lay-out' got outdated. The only original way to make it work is if i find the diskettes is to buy an old computer. Althought i have not asked my school yet if they still have an IBM computer with DOS on it available 2. I'm getting real headaches of Interface B. RoboLab does not work and bugs in every aspect. ControlLab on Windows 98 also doesn't work (yet!) because it does not support the adapter for the SR-232 port on the current computer. I hope it works with another computer where a SR-232 port is integrated in the motherbord. For now it does only work with the program from LGauge. Reverse engineering the program to make a specific program for each creation would mean an immense time of work 3. My teacher found a new batch of LEGO. When opening the boxes of Interface B, they were gone. Luckily my teacher found them back with even more LEGO Some notes about the 9751 and sensors: - The rotationsensor is very accurate. It can measure at low speeds one single rotation in 16 steps! (22.5 degrees) - The 9751 does not like buggymotors - In comparisations i can regulate any motor towards far lower speeds with 9751 than any other powersource (PWM maybe?) - The lightsensor is not very accurate. Maybe does a LEGO approved setup proves the opposite (and i get it working with the real software) Got somebody any tips about the software?

The details of that website are truly astonishing!

Interface B (9751) works directly with a PC or laptop that has a RS-232 port. The IBM Card (9771) is only meant for Interface A(9750). Helpfull info about interface B: http://lgauge.com/te...rfaceB/9751.htm If you want the original software i'll hear it. EDIT: DrJB The card is only for 9750 (4,5 set). You don't need one. I heard from a near company that also uses a serial port for their equipment to measure networks that USB converters are not as reliable as any other solutians because the adapters have their own inbuilt electronic converters. (A laptopstand or something else should be more reliable)

Do you mean interface A? Tomorrow i'll start the rescue mission on school to find the lost diskettes with software and/or Teacher Guide. Tuesday i visit a friend who can help me probably with all my hardware problems. If you mean interface B, i can sent you RoboLab or ControlLab (Win98) if you want to, should work as stated on the internet. (Works on Windows 7 64 bit, but you need to install the NXT driver for some random reason apart from it to make it work.) @ TwentyLeggedHan: Well, i feel to make something awsome for my school back. EDIT: I heard diskettes could lose their information because they are magnetically.

I was able to get a free copy of RoboLab 2.9. RoboLab supports above version 2.5.4 Interface B. We will shortly see wich one works the best (or does even work with ). If RoboLab works we don't have to use Windows 98 anymore. For now i assume interface A used the BASIC OS. For interface A i found the program called BeepEm. Just an OS emulator of the Acorn BBC Microcomputer. I was not succesfull at finding an ISO for a VM. I'm curious how BeepEm could interact with Interface A since it is an emulater like Azzepa said. Maybe i can find in a Teacher Guide or some diskettes some programs that are written for BASIC. Looking at the codes from the manual, page 76 describes how to connect BASIC with interface A without any ''third party'' program. From there you could say no programs are used here to connect Interface A. It looks like the codes ARE the program. At the end of the codes you can see that when an error occurs, an error message gets printed: https://www.dropbox....67/SCN_0007.jpg It would only not explain where code "ERC=4" comes from. (EDIT: "ERC=4" Found) I found out it's just not only the BBC Microcomputer but works with any compatible IBM Personal Computer with BASIC. This explains why the back from the manual was not the same as the ones from the BBC Series. http://www.miniland....ta/robotica.htm Proves that there is indeed software next to the codes from the manual.