Homemade CISS

[JoeG_6112]

Hello:

The 4 color containers at the start of your slides, are you able to attach longer tubing or must you use the tubing supplied.

I have a wide body printer which will need longer tubing than I've commonly seen on pre-done setups.

Joe

 

[nerdful1]

This is just the thing for a maker in a hackerspace to try.

Would also be a good public class/demo to show the public:
1. That printer mfr's are evil and there ARE ways around it.

2. For the sake of tinkering, and especially if you have all the tools because you MAKE lots of other things. I for example would only have to keep my wife from throwing out her breath mint cases, and I would need to find out where to get tubing.
I already have a soldering iron, glue gun, bottles.

3. I have put a lot of time into my HP c309a, still to have magenta problems. Building this from junk parts won't cost me anything but time, of which this machine is perfect at sucking up.


3. Bravo aaa!

Something I may try is using my favorite material (a bit pricy) Instamorph plastic. It is like Delrin plastic at room temp, but at 130 degrees F it is like gum or putty, easy to mold or remold your mistakes.

 

[aaa]

JoeG_6112,

To connect one tube to another is just a small problem. My post #51, 4 picture.
(My tubing has 1 meter in length.)

 

[wss]

or in the cap of the bottle ?
thanks

It is a bad decision.

I would appreciate if you explain the reason behind this conclusion.
For Google translatin: Why ?

I don't comprehend the reason for the chamber below the bottle. What's the difference with just this?

this would not constitue Marriotte tank

Also, how do you prevent the chamber from filling with ink from the bottle when you remove the cap to refill the bottle?

you can sqeeze the pipe temporarily


PS I saw this tik-tak box mentioned as being used for the same purpose many years ago at resetters.ru forum. So I also wonder - what is the main innovation ?

 

[aaa]

WSS

This is very inconvenient. When you are turning the cap, the tube rotates together. You can not to put the cap on the table or printer, because the tube is smeared with ink. You can damage the air-tightness, if you twitch a lot for the tubes.

I know www.resetters.ru very well. People, who are living on ruins of socialism, are very inventive.

 

[aaa]

and I would need to find out where to get tubing.
3. Bravo aaa!

Thank you. I bought a thermo tube (Heat-shrinkable tube) in Radio Amateur shop.

http://www.lemona.lt/index.php?page=item&i_id=24346

 

[ThrillaMozilla]

Nice. This is a very nice design, and I'll bet we will see more of these. I think I can summarize some of the design features.

First, a safety feature. The vent, shown in A43 by yellow arrows, runs high up on the bottle. This insures that the air regulator (the Tic-Tac box below the bottle) will not overflow if the cap is left untightened or there is an air leak at the printer.

Second, the air regulator (Tic-Tac box) has a large horizontal area, so the head (liquid level) will not change much if there is a large decrease in atmospheric pressure. It looks like a 10% drop in atmospheric pressure would cause approximately a 1 cm change in liquid level, or less.

Third, the outlet tube comes into the bottle from above. That means that pigment particles cannot settle into the tube and block the tube.

Fourth, the outlet tube is not attached to the filler cap. This is a convenience when you remove the cap.

Fifth, the hypodermic needle (or needles) constricts the flow, so the bottle can be opened and filled easily without pinching any tubes.


It might be worth mentioning that there is another design that accomplishes the same by very different means. Someone pointed out that you can regulate the pressure perfectly by floating the ink bottles in water. Then someone pointed out that you can do the same by floating the bottles on springs that are matched to the area of the bottles. I don't remember who did this, but someone made a very nice CIS using springs.

 

[wss]

WSS

This is very inconvenient. When you are turning the cap, the tube rotates together.

you can rotate the bottle instead...

Second, the air regulator (Tic-Tac box) has a large horizontal area, so the head (liquid level) will not change much if there is a large decrease in atmospheric pressure

Can you avoid Marriotte tank altogether by simply using large horizontal bottle, e.g. box for CDs ? or


I understand what Marriotte tank is for, but don't understand - where the problem of different flow speed comes from - from the height of the ink in the bottle only ?

 

[aaa]

... Someone pointed out that you can regulate the pressure perfectly by floating the ink bottles in water. Then someone pointed out that you can do the same by floating the bottles on springs that are matched to the area of the bottles. I don't remember who did this, but someone made a very nice CIS using springs.

I know these designs. But I do not like it. The less moving parts are better, the reliability is higher.

 

[turbguy]

Certainly you are experiencing success with your home made CISS. Assuming there is some ink in the lower chamber, does not the balance pressure change by the height difference between the bottom of the chamber to the chamber's tube entrance to the bottle (one or two cm) during constant printing?

In other words, constant printing pulls in the ink from the lower chamber to refill the bottle, and then an air/ink interface (bubble) is drawn up the tube, until air enters the bottle.

Wayne.