It works really well. I would have expected even a little bit of leaking. I would have 3D printed everything except the syringe itself. A neat way to have sensors without breaching the cylinder is to use a magnet inside the piston head and have it trigger either reed switches or hall effect sensors.
Why does the rod need to penetrate the end of the syringe? If it's just to stabilize that end, you could have just 3D printed or laser cut a support with holes in it to go in there that was a tight fit. Push it to the end of the syringe and count on it being a tight fit or put some glue on a long paintbrush and carefully glue it in place. You also didn't need to penetrate the syringe for the limit switches. Glue a magnet to the back of the seal and glue a reed switch to each end on the outside of the syringe.
Nicely made but where did all that air that was in the syringe go when the piston drew in the water?-it leaked out past the motor mount and lost? unless there is a way to get that air back, it's a one way trip to the bottom??
The air in the syringe is compressed and stored in a submarine hull. If the hull is under pressure and the hull lacks confidentiality, it will sink forever. I am using it well without any problems as a result of the test.
Any idea what kind of depth this will work to? What keeps the lower limit switch from leaking? It looks like it pokes right into the syringe. I wonder if magnets could be used as limit switches
Hello, I would to try to build this soon. Can you show how to wire the two micro switches like you have running in the video? Also can that same plate you show the laser making be made on a 3D printer? I do not have access to a laser printer. Thanks again tiver21
Hello! Great help for my project. One question, can you use Arduino microcontroller to control when to stop the piston? So that you do not have to use limiting switch.
Hi Tiver, great job!!! I was thinking to create something similar: two opposite cylinders placed in an OTW Design Type VII 1/32. I cannot use syringes i will have to manufacture everything and i am afraid that it will leak water through the piston head , more when pushing the liquid out. I will try it, i am planning to use a pancake stepper motor, driver and Arduino, for the thread i am thinking of using lead screw with a ball nut there the piston will be fixed, i think it is called ""external linear actuator". What do you think? The piston head diameter will be around 100 mm..Not sure what to do...Initially the plan was to install a closed WTC with water pump. Thank you. Bogdan
Hey tiver21, great stuff, is it possible to grab the stl files somewhere else? On your blogsite its a little bit difficult cause the language….ok i fixed the problem ..thx a lot for your files - very good work!
Hi tiver21 can you ask you to do the exact same ballast system on my model, because I don't have access to such equipment if you can do what I'm going to have to pay you?
It works really well. I would have expected even a little bit of leaking. I would have 3D printed everything except the syringe itself. A neat way to have sensors without breaching the cylinder is to use a magnet inside the piston head and have it trigger either reed switches or hall effect sensors.
Or these same motors come with an encoder, you can position it wherever you want.
Goo job 👍 do you have a video showing how to make the switch using a servo?
There are many videos if you search on UA-cam.
You did a really good job. Perfect idea to save space in small subs.
Hi, can you please explain how is the threaded rod and piston sealed....?
the rubber hole is so tight it seals it
@@borecek168 there still will be a gap because of threads in the shaft and the cut thread in the rubber...... i.e. a possible leak
@@shauryagupta4990 you can use sealed bolt and glue on that metal plate, it shoud be enought
@@borecek168 ok....
Let me try that.....
To prepare for water leaks, I make a grease inlet inside the Rubber
but Not used. rubber hole is so tight it seals it.
Why does the rod need to penetrate the end of the syringe? If it's just to stabilize that end, you could have just 3D printed or laser cut a support with holes in it to go in there that was a tight fit. Push it to the end of the syringe and count on it being a tight fit or put some glue on a long paintbrush and carefully glue it in place.
You also didn't need to penetrate the syringe for the limit switches. Glue a magnet to the back of the seal and glue a reed switch to each end on the outside of the syringe.
Nicely made but where did all that air that was in the syringe go when the piston drew in the water?-it leaked out past the motor mount and lost? unless there is a way to get that air back, it's a one way trip to the bottom??
The air in the syringe is compressed and stored in a submarine hull.
If the hull is under pressure and the hull lacks confidentiality, it will sink forever.
I am using it well without any problems as a result of the test.
@@tiver21 Ah a watertight hull..I should have known-Nice job!
What do you use to Control / drive the emotor
please tell me what glue you use
Tell the time in the video. I will check.
подскажите пожалуйста,каким клеем пользуетесь
Any idea what kind of depth this will work to? What keeps the lower limit switch from leaking? It looks like it pokes right into the syringe. I wonder if magnets could be used as limit switches
Good but you can use as double side. Separate two zone both side of the moving piston. When one side succession otherside pushing stars.
very nice design but is it tight on this crowd? what do you lubricate the piston and thread?
It works well without lubricant. So I didn't use any lubricant.
What about the hole through the tube where the little screw for the empty switch goes through, is it sealed? Would it hold under high pressure
Pretty neat, but isn't the hole in the rubber seal in the middle gonna cause some issues when you go down and the pressure increase?
I tested it. No problem. I'm a little worried about durability.
@@tiver21 How deep can you go?
its really neat but is there a way to make the motor faster?
Either a faster motor or a thread with more pitch so it moves more per revolution
You can stop the piston in its travel any place you want right?
You can stop by placing a micro switch on the stop position.
Hi what type of saw are you using to cut the copper and what thickness? It looks like 1mm?
Hello, I would to try to build this soon. Can you show how to wire the two micro switches like you have running in the video? Also can that same plate you show the laser making be made on a 3D printer? I do not have access to a laser printer. Thanks again tiver21
Can you tell me what the small electronics is that is connected to the geared motor? What is it`s specs? Thank You
When this is under water, where does it draw the air from?
Grantley Design
it pushes the water leaving air inside cuz you can still get air underwater
sory for bad explanation
I guess you compress the air in the rest of the water tight cilinder
You compress the air inside the submarine
What RPM was the gearmotor?
I'm sorry. I don't know...
Hello! Great help for my project. One question, can you use Arduino microcontroller to control when to stop the piston? So that you do not have to use limiting switch.
Use a transistor along with arduino, find out the time interval first then programme the arduino
Hi! Thanks so much your reply , I can't open your blog. Do you mind resend to me? so much thanks for your help.
blog.naver.com/tiver21/221670073624
Good job👍
Please Can i have the name of components you have used?
マイクロスイッチのプッシュロッドからとピストンゴムの穴から圧力が漏れると思います。
シリンジに水を取り込んだ時にWTC内の圧力がシリンジ内へ抜け、シリンジ内の水を排水する時にWTC内へ水が漏れると思うのです。
私も悩んでるところだ。
備えておいた。WTCに入れてテストをして見る。
結果は私も分からない。
どうか漏れなく成功することを願っている。
君の意見ありがとう。
Anyone watching this should check out LaLa Rc’s channel to see how this is done.
Excellent job💯💯💯💯
Hi Tiver, great job!!! I was thinking to create something similar: two opposite cylinders placed in an OTW Design Type VII 1/32. I cannot use syringes i will have to manufacture everything and i am afraid that it will leak water through the piston head , more when pushing the liquid out. I will try it, i am planning to use a pancake stepper motor, driver and Arduino, for the thread i am thinking of using lead screw with a ball nut there the piston will be fixed, i think it is called ""external linear actuator". What do you think? The piston head diameter will be around 100 mm..Not sure what to do...Initially the plan was to install a closed WTC with water pump. Thank you. Bogdan
Put the oring and grease in the thread rod of the piston head. This won't leak. Maybe... ..I wish you success in your challenge.
Hey tiver21, great stuff, is it possible to grab the stl files somewhere else? On your blogsite its a little bit difficult cause the language….ok i fixed the problem ..thx a lot for your files - very good work!
It's a site in South Korea.The language must have been hard.
I'm glad it helped you.
如何保证活塞不漏水呢？
Rubber packing is thick, which is a basic waterproofing And we are planning to fill the rubber packing with grease to prevent the second round.
主要是怕穿过螺杆的孔会漏水！谢谢你的回复
대글이 아주 다국적이네요 ㅋㅋㅋ
Hi tiver21 can you ask you to do the exact same ballast system on my model, because I don't have access to such equipment if you can do what I'm going to have to pay you?
10:03 i am now PURE bored watching you drill each hole seven times ffs. edit