Anth's Computer Cave

HP Teardown

After tearing down the big Canon MP780 and HP CP1515n printers last week I was looking forward to the next teardown. This HP 1410 was a bit disappointing by comparison. It still yielded a few good parts, though.

This is one of those cheap multi-function printers you can almost lift with one hand. The top and bottom sections were held together by deeply-sunk torx screws that my driver could not reach, so we drilled the plastic away with a half-inch drill bit until the unit fell apart.

The scanner unit had no slide assembly, but it had an interesting little crawler instead that moves along a straight gear. It is light-weight with a small DC servo motor that has a rotary encoder on the rear. It will definitely be useful for something.

The print head, while definitely not heavy duty, will still be useful. I have connected it to AAIMI and taken it for a run.

I hope to have the linear encoders worked out soon, although this one seems to have a bit of ink on it and I am not sure if it will work.

The printer had two other motors, including the one driving the print head. They seem to run happily between 5V and 12V. One has a small belt drive assembly with a rotary encoder.

There were less gears in this printer, but there was one assembly with an interesting swiveling system that transferred rotation through a series of gears regardles of where the swivell arm was pointed. I have no idea what I can use it for, but it amused me for a while.

The control panel is not really good for much. It has a one-character LED display, which can obviously only provide very limited information. There are eight buttons on board, but they are not the clickety-clack tactile switches I prefer to use. These ones feel dead and you never know if you have pressed the button or not.

While the haul from this teardown was light, so was the waste left over. This unit was really hollow and made from thin plastic which should smash to bits easily for a small land-fill footprint



Though not as much fun as previous teardowns, this was still worthwhile. I cleared some space in my cupboard, scored a few motors that do not require super heavy duty controllers, as well as two light-weight sidewards-movement assemblies. I also scored the power chord, which outputs 16V and 32V at about 700ma.

I have ran out of printers for now, but it won't take me long to find more. In the mean time I will work on hacking the various parts to put them to use. Stay tuned for a new printer hacking section in the cave where I will post details about these efforts.



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Next: Teardown: Ceramic hair-straightener



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