My parts list: HobbyKing: 36638 Turnigy D2836/11 750KV Brushless Outrunner Motor+ shaft connecter set, TTS-18A/32466 Turnigy TrackStar 25A 1/18th Scale Brushless Car ESC, 3-axis compass module - HMC5883L, (didn't work properly, I now own a BN055 gyro), Raspberry Pi Camera Module (not very good in low light, luckily have the Gopro for images afterwards), Tenda poweradaptor V2 (to improve communication over 2 wires), MB7092 transponder (height sensor;TTY), MS5837 depth sensor (I2C), Sidewinder USB Joystick, one 100m flexible twisted pair from a UTP cable (tether), cheap 2A cigarette lighter USB adaptors to step down from 11.1V to 5V,
Hi! Congratulations! I wanna ask somethings. How did you prevent waterproofness? What did you use to prevent waterproofness? We are doing a rov and i wanna learn. How can we provide waterproofness? Thank you
i too want to do something similar with a ras pi. what did you use? did you have to do any coding yourself? how did you get the microsoft controller to work or control?
Hi Niels. You used a 12 volt battery on the surface and transmit the power (and data) to the ROV over 2 wires for a distance of 50m? I am surprised that works (I thought there would be too much of a power loss along such a long, small guage wires). If this is how you implemented your ROV, I may rethink my design too! thanks -Ray
No, after seeing another webpage on your build, it looks like you have a LiPo battery on board for power. The tether wires only seems to be for communication purposes.
Ray Johannsson, indeed, a few Watt is all you can sqeeze through those wires, so I don't. One 3S lipo on board and one onshore on the tether for the tenda and the wifi router. With the router i am free to move the laptop around. I have tested my new sonar and depth keeping script and should share some video soon. This week I printed cages for the ducted props, since the tether was cut by the prop for the second time! Good luck with yours
No, I didnt waterproof them. I only used ptfe on the bearings when they got stuck. I should have used something better like grease or corrosionX...however they cost only 10eur a piece so no big loss.
Hi David, I think I have made about 15 runs in sweet water without much drying or spraying the bearings, which would have helped I suppose. They were completely worn out and corroded when I replaced them by INOX bearings. For my type of motors I bought inox bearings in France, they are sold for fishing reels. 4X8X3 INOX SMR84 ZZ and ROULEMENT A BILLES 4X8X3 INOX SMR84 ZZ via eBay. Around 35 euro including shipping for 3 motors. More than the motors are worth, however else you keep replacing them.
Niels Affourtit ok....so the brushless motors stays alright and the only problem are the bearings? What about the electricity running through the copper coils underwater???
Yep. No problems with the rest yet. I have had 2 tether breaks recently, so I have the idea the tether is wearing out on frequently bent spots. I focus now on cable break scripts to stop and surface the ROV and i am considering to attach a rope to the tether in case the electrical cables break
Ok nice...I see. I´m afraid that the brushless are gona dye very soon if I use the barren in salt water. Hence I´m trying to set up a nice magnetic coupling but it´s very slow process (not enough time). In regard with the tether, I´ve done my own unit with an 8mm intern diameter, 12 mm extern diameter house (merlett brand) of 50 m long and 6 cables inside and it works very nicely. I´m using it to wire a gopro underwater: battery, shooter and power button. It´s very robust. How do you insert the tether in the ROV?
I have glued the tether in the hull with epoxy. I create a U shaped pocked in the PVC and fill it with epoxy. Since the tether is connected to the TENDA home plugs, I can simply use a waterproof connector like described here: forum.openrov.com/t/tether-disconnect/2909
Can you access them via my Gdrive? drive.google.com/drive/folders/1TxkqlL3mlrMy0tKbd_zDjb08B3-B9nYl?usp=sharing The dia is 65mm the pitch 35 and the thickness 1 and 2mm.
Дмитрий Кудинов i have written a python script to communicate over a socket connection. The pwm commands are send via pi-blaster. The joystick i read out with pygame and the keyboard with win32api.
Hi Tom, I partially used the scripts from RemoteJoyBorg. They tell you how to read a joystick and connect to the raspberry. I can share my Python files, but I don't know how.
That screw connection is performing very well. The screen is pressed against the O-ring by this screw and tightens even more with depth. I do see little wear on the threads, but don't think that'll become a problem.
My parts list: HobbyKing: 36638 Turnigy D2836/11 750KV Brushless Outrunner Motor+ shaft connecter set,
TTS-18A/32466 Turnigy TrackStar 25A 1/18th Scale Brushless Car ESC,
3-axis compass module - HMC5883L, (didn't work properly, I now own a BN055 gyro),
Raspberry Pi Camera Module (not very good in low light, luckily have the Gopro for images afterwards), Tenda poweradaptor V2 (to improve communication over 2 wires), MB7092 transponder (height sensor;TTY), MS5837 depth sensor (I2C), Sidewinder USB Joystick, one 100m flexible twisted pair from a UTP cable (tether), cheap 2A cigarette lighter USB adaptors to step down from 11.1V to 5V,
How the motar be waterproof what is the process of waterproofing
Hi! Congratulations!
I wanna ask somethings.
How did you prevent waterproofness? What did you use to prevent waterproofness? We are doing a rov and i wanna learn. How can we provide waterproofness?
Thank you
Wow. Pretty much what I’m trying to do. Can I get the files off you by chance?
i too want to do something similar with a ras pi. what did you use? did you have to do any coding yourself? how did you get the microsoft controller to work or control?
Good job! Thank you. Did you use PID algorithm?
Sir ,can I get the code for this rov
Yes. Do you need the scripts or the complete image? Please contact me at raspirovniels@gmail.com.
Can i get the full python code ?
Can you tell us the parts you bought? (Type of motor, board, sensors)
Hi Niels.
You used a 12 volt battery on the surface and transmit the power (and data) to the ROV over 2 wires for a distance of 50m? I am surprised that works (I thought there would be too much of a power loss along such a long, small guage wires). If this is how you implemented your ROV, I may rethink my design too!
thanks
-Ray
No, after seeing another webpage on your build, it looks like you have a LiPo battery on board for power. The tether wires only seems to be for communication purposes.
Ray Johannsson, indeed, a few Watt is all you can sqeeze through those wires, so I don't. One 3S lipo on board and one onshore on the tether for the tenda and the wifi router. With the router i am free to move the laptop around. I have tested my new sonar and depth keeping script and should share some video soon. This week I printed cages for the ducted props, since the tether was cut by the prop for the second time! Good luck with yours
No, I didnt waterproof them. I only used ptfe on the bearings when they got stuck. I should have used something better like grease or corrosionX...however they cost only 10eur a piece so no big loss.
Good job man
Nice job !!!! How long did the brushless motors resisted the corrosion?
Hi David, I think I have made about 15 runs in sweet water without much drying or spraying the bearings, which would have helped I suppose. They were completely worn out and corroded when I replaced them by INOX bearings. For my type of motors I bought inox bearings in France, they are sold for fishing reels. 4X8X3 INOX SMR84 ZZ and ROULEMENT A BILLES 4X8X3 INOX SMR84 ZZ via eBay. Around 35 euro including shipping for 3 motors. More than the motors are worth, however else you keep replacing them.
Niels Affourtit ok....so the brushless motors stays alright and the only problem are the bearings? What about the electricity running through the copper coils underwater???
Yep. No problems with the rest yet. I have had 2 tether breaks recently, so I have the idea the tether is wearing out on frequently bent spots. I focus now on cable break scripts to stop and surface the ROV and i am considering to attach a rope to the tether in case the electrical cables break
Ok nice...I see. I´m afraid that the brushless are gona dye very soon if I use the barren in salt water. Hence I´m trying to set up a nice magnetic coupling but it´s very slow process (not enough time). In regard with the tether, I´ve done my own unit with an 8mm intern diameter, 12 mm extern diameter house (merlett brand) of 50 m long and 6 cables inside and it works very nicely. I´m using it to wire a gopro underwater: battery, shooter and power button. It´s very robust. How do you insert the tether in the ROV?
I have glued the tether in the hull with epoxy. I create a U shaped pocked in the PVC and fill it with epoxy. Since the tether is connected to the TENDA home plugs, I can simply use a waterproof connector like described here: forum.openrov.com/t/tether-disconnect/2909
very nice!
can you share the proppellers stl files ?
Can you access them via my Gdrive? drive.google.com/drive/folders/1TxkqlL3mlrMy0tKbd_zDjb08B3-B9nYl?usp=sharing
The dia is 65mm the pitch 35 and the thickness 1 and 2mm.
Hello. What software you use for control of the ROV?
Дмитрий Кудинов i have written a python script to communicate over a socket connection. The pwm commands are send via pi-blaster. The joystick i read out with pygame and the keyboard with win32api.
Hi sir.. Where did you get the code to control it, are there any UI or scripts to raspberry to be found
Hi Tom, I partially used the scripts from RemoteJoyBorg. They tell you how to read a joystick and connect to the raspberry. I can share my Python files, but I don't know how.
Hi you can use website named pastebin and send the link to post@tknudsen.com
How is the screw cap on the front viewing port holding up?
That screw connection is performing very well. The screen is pressed against the O-ring by this screw and tightens even more with depth. I do see little wear on the threads, but don't think that'll become a problem.
+Niels Affourtit Thanks. I might try that on mine!
+Niels Affourtit I started looking for it, but can't find it yet. Does the cap have a special name so I can locate it?
+rsokors PN6 4” socket union BIFV PVC-U. Contact your local pipe dealer. The screen i cut myself with a router
+Niels Affourtit Thanks!