Search found 238 matches
- Jul 8th, 2014, 10:45 pm
- Forum: Thrusters
- Topic: Building a Magnetic Coupled Thruster.
- Replies: 28
- Views: 16903
Re: Building a Magnetic Coupled Thruster.
Awesome! I can not wait to see the rest.
- Jul 8th, 2014, 3:02 am
- Forum: Thrusters
- Topic: Thrusters placement
- Replies: 4
- Views: 7131
Re: Thrusters placement
Firstly, welcome to the forum! The first thing you will need to decide is what the intended purpose of your ROV will be. There is no one 'best' thruster configuration, only the best configuration for your application. For instance, if you want to build a small observation-class ROV primarily for loo...
- Nov 23rd, 2013, 9:53 pm
- Forum: Your ROV Projects
- Topic: Electrona
- Replies: 14
- Views: 16370
Re: Electrona 1 (new pics & video)
Wow, amazing job! You have crafted a very polished final product. May I ask what camera took the video's you posted? Was it the board camera you mentioned, or something else? Awesome job.
- Nov 18th, 2013, 2:35 pm
- Forum: Thrusters
- Topic: Mag coupling version 3.0 vid (updated new video 1/25/15)
- Replies: 44
- Views: 20414
Re: Mag coupling version 2.0 video
Cool beans :) Any concern about the motor overheating? Seems like the bilge pumps are at least partially cooled by the water or at least they seem to burn out a lot faster without it. I believe it is just the lip seals that needs to be kept cool. In normal operation in the bilge of a boat, the enti...
- Nov 14th, 2013, 11:26 pm
- Forum: Your ROV Projects
- Topic: Florida International University Senior engineering project
- Replies: 13
- Views: 8220
Re: Florida International University Senior engineering proj
I believe he is using claws from sparkfun. See this thread for a link:
viewtopic.php?f=14&t=438
I bought one and was not impressed with the quality, FWIW. Might be okay if you were actually using it with a servo (I wasn't) and not underwater.
viewtopic.php?f=14&t=438
I bought one and was not impressed with the quality, FWIW. Might be okay if you were actually using it with a servo (I wasn't) and not underwater.
- Nov 14th, 2013, 6:14 pm
- Forum: Manipulators & Tools
- Topic: My Gripper solution
- Replies: 7
- Views: 11095
Re: My Gripper solution
Red and Blue will be where you attach your motor controller (relay, etc.). Black and Green will need to be respectively at 0 and 5 Volts(or other reference voltage of your choice). Yellow will connect to your microcontroller or other circuitry. The voltage level on the yellow wire will correspond to...
- Nov 8th, 2013, 11:28 pm
- Forum: Thrusters
- Topic: thruster draw esc pwm vs continuous
- Replies: 4
- Views: 3499
Re: thruster draw esc pwm vs continuous
Ah, okay. I went and found my notes from when I did current draw/propeller/thrust tests a few years ago for some 1000 gph bilge pumps. The Robbe 50mm drew ~5.3 amps @~12 Volts, and a similarly sized Octura propeller that I also tested drew 5.6 Amps. I also tested some others that drew a greater curr...
- Nov 8th, 2013, 4:14 pm
- Forum: Thrusters
- Topic: thruster draw esc pwm vs continuous
- Replies: 4
- Views: 3499
Re: thruster draw esc pwm vs continuous
I have measured from 4 to 8 amps current draw at 12 volts, depending on the bilge pump GPH and propeller efficiency. There is no 'thrust to current gain' outright in using variable speed control. However, since you are only using as much thrust (and as a result, current) as you need for any given si...
- Nov 7th, 2013, 6:31 pm
- Forum: Thrusters
- Topic: Brushed DC motor in oil.
- Replies: 17
- Views: 10528
Re: Brushed DC motor in oil.
I still think mag-coupled thrusters is the way to go. If the oil heats up doesn't that mean that your motors are working too hard to turn in the added viscosity of the oil (rather than air)? It doesn't necessarily mean anything is wrong - brushed dc motors can get hot even under normal operation in...
- Oct 29th, 2013, 8:03 pm
- Forum: Thrusters
- Topic: My new BLOG
- Replies: 25
- Views: 14929
Re: My new BLOG
Cool, keep up the good work. I really like your control scheme, with each device being "smart".