Repeated head cleaning cause problems

[turbguy]

I have burnt out at least two print heads via repeated deep cleans. One was even oderous (smoke smell).

I suspect we should put a cool-down limit time between deep head cleans?

Wayne

 

[Grandexp]

Interesting. How did you determine it was the deep cleaning that burnt the print head and not the printing after the deep cleaning? Well, the nozzle check is not likely to burn the print head so I guess the deep cleaning did burn it.

 

[turbguy]

Print had went "poof" during deep cleaning. i960.

Wayne

 

[fotofreek]

In the "olden days" (ten years ago) when I was using an Epson printer and I was working on clearing a slight clog I was cautioned to run no more than two normal cleanings and a deep cleaning before stopping and letting it rest. Probably has little if any bearing on a canon due to very different technology, but thought I'd throw this in anyway.

 

[ghwellsjr]

Print had went "poof" during deep cleaning. i960.

Wayne

The nozzles do fire, at least part of the time, during cleaning cycles but I'm surprised that that very small amount of nozzle firing would overheat the print head to the point of burning it out. There is a temperature sensor in the print head for the MP780 (and I presume others) that shuts down operation if it gets too hot. I would guess more than likely that if it wasn't due to stray liquid getting on the electronics somewhere, it would be just one of those spontaneous malfunctions that seem to happen to Canon print heads.

 

[turbguy]

I believe that there is a temp sensor for certain parts of the printhead, but not every part of the printhead.

Wayne

 

[turbguy]

I agree that cleaning is required at times to keep documents printing correctly.

My experience relates to 4, 5, or 6 serial deep head cleans in a row.

Wayne

 

[The Hat]

I agree that cleaning is required at times to keep documents printing correctly.

My experience relates to 4, 5, or 6 serial deep head cleans in a row.

Wayne

That is one of the reasons that I recommend not to use Deep Cleaning if at all possible
and just to stick with the normal head clean, not to mention the complete waste of ink.

Canon only ever recommends the use of one Deep Head clean to fix stubborn clogs..

 

[turbguy]

However, deep cleaning is the only option available when running in service mode (not teathered to 'puter).
Wayne

 

[websnail]

However, deep cleaning is the only option available when running in service mode (not teathered to 'puter).
Wayne

Not entirely true... There's always the manual cleaning approaches that trigger laid out here:
http://www.nifty-stuff.com/forum/viewtopic.php?pid=53386#p53386