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You got the physics all wrong - printhead out of printer does not have anything to do when ink boils or anything overheats. It's all room temperature! The laws of physics beats any religious beliefs! Read #4 again slowly and carefully!

I'm a heathen so I must contradict the 4:th commandment. It is only true with fluid on one side and air on the other. Fluid on both sides removes the forces from the surface tension in the tiny holes and the only forces involved come from the turbulence in the tiny holes. 'th became a "Thud" -...

-- reply to Palombian -- Why not? I was just thinking of The Hat's method combined with your own experiences. Replace cartridges with "the cleaners", do a normal clean, wait for "a while" and let the pigments settle, do another normal clean, check if any pigments remain. With no pigments...

Warum einfach wenn es so herrlich kompliziert sein kann? It takes more energy to boil water than many other fluids so this should keep things cool but I don't know precisely what other fluids are used in the inks. Changing viscosity and density can be other causes for pigments to form a...

That sounds lika a very kind and generous offer that will make things even easier. Is there some way of writing directly to you for the details? ... answer to myself - found the "start conversation" button! Will use that tomorrow. Many Thanks!!

Back in the days when I did this thing called "work" it was encuraged that we took all the necessary precautions to keep stuff from blowing up or crashing (flying stuff, explosives or both). Some of this thinking rubbed off on me so the solution to fill cartridges with "preservative" and keep...

My favourite photography club (where exhibtions and competitions are the main reasons for printing) has been dormant for the last year and it will probably take half a year until anything happens. Three months to a full year between print jobs is what I must plan for. I had given strict orders...

A couple of years ago I had to replace the printhead in my 9500 Mk II (after letting it go bone dry by mistake). The intervals between "printing sessions" are random so my question if it is possible to put it in "hibernation" between sessions to make it survive. If replacements are unavailable...

If you are producing something that relies on the accuracy of the individual components it's good engineering practise to check what happens if the incoming components are just marginally within the limits in the actual specification. It's not uncommon to just take the first samples from a...

The left part in the picture shows plexiglass and a modified cap for PGI-9 cartridges glued together with a cyanoacrylate that is used with a primer to stick to "hard-to-glue" materials. The plastic stuff in the cap is unkown, no markings of what type it is. I tested a few other glues on...

@Smile No CNC unfortunately, my mashines are more of the kind tool- and watch-makers use. Hand-cranked but very good precision if you have the patience and the equipment to do accurate measurements along the process. I used to design and build equipment used in research institutions and in my...

PeterBj Gaskets with a hard surface don't make good seals if the force compressing them is low. Even is you add a softer layer below the seal will still be qustionable. It's usually the other way around, soft surfaces and a hard core that fills the rest of the gap. If you need to make new...

Basically it's a modified cap/gasket in a thick rectangular plexiglass part. On top of the rectangle is a plexiglass tube, volume 20 ml. All the parts are glued together. The gasket and tube thingy moves up/down and is springloaded to compress the gasket. The center of the gasket is removed all...

The glue (in entry # 5) is a cyanoacrylate (from Ebay picture) and they in general work below 150 C (300 F). Some of these types set extremely quickly, you have a second or so to position the parts. I have tried a similar type and had to remove the glue mechanically and start all over. That...

I think your soulution would work if you replace the plastic gaskets with ones made out of a bicycle tube. The thickness on one tube I found was 0,9 mm. Pretty close I think. Your LBS (local bike shop) would probaly have other types (and thicknesses) in their rubbish bin. If the bottom gasket...

PeterBJ If you want to match the hardness of the old gaskets you can compare the data sheet for Casco Glassilikon (which is the one I used) and similar sealants. Look for the hardness value measured in Shore A degrees. A really simple hardness tester is a round pointed toothpick with the tip...

... but I used a genuine plastic lid from "Rydberg's Potatisallad" for the illustrations. Surely that must compensate my unforgivable error to some extent?

Using commonly available materials its easy to make soft silicone gaskets for use as seals when filling ink cartridges. The silicone can also be used to make reusable caps to seal the cartridges after refilling. Some nice properties would be: - Softer than the usual rubber sheets used for...

The retalier got it right, the voltage (without any load applied) only tells you the cell might be OK. The simplest battery tester at least uses a load to see if the cell can deliver current. If the load is matched to the battery type and size the test is even better. A low voltage without load...

In general it's not 100% safe to write to eeproms when the supply voltage is falling below some design limit when data is only partially written or the data/adress is garbled. Without knowing the exact details on Canon cartridges they must have some identification of type and ink colour inside...