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tomvld

Ultimaker Original shut off during preheat

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If it is an UMO then it is an 'old' printer -- I not saying this in a negative way, just a deduction that it is not a newly assembled printer, and that it should have worked in that past...

So what did you changed recently?

At first I am thinking of 2 problems:

- Power supply as already mentioned

- A short in the heater cartridge (or the cabling to it), so when you start heating it shorts the power supply and everything goes dark.

I would disconnect the heater cartridge and measure the resistance to check for a short; also try to pre-heat with the cartridge disconnected: nothing should happen (except for a temp error after a while), but that would exclude a short on the board itself.

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Yes, it is definitely an 'old' printer and it has worked fine for me the last couple of years without any major problem. But after finishing a print I wanted to preheat for another print and suddenly the printer shuts off. I didn't do to, or modify anything on the printer.

Personally I don't think it's a power supply issue since the printer can be switched on, the problem occurs when I want to increase the temperature.

This afternoon I will measure the resistance in the heater cartridge, do you have any expierence with that? Can you suggest me some cables/connectors that I should measure?

Thanks for your suggestion!

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Personally I don't think it's a power supply issue since the printer can be switched on, the problem occurs when I want to increase the temperature.

I don't think either, but it could be that the PSU is still able to provide enough current for the board (it does not need a lot), but gives up when you really draw power...

This afternoon I will measure the resistance in the heater cartridge, do you have any expierence with that? Can you suggest me some cables/connectors that I should measure?

Disconnect the 2 wires from the 'Extruder 1' connector on the top of the board and measure the resistance. I can't remember what it should be (I can check when at home) but if it is a short then it is definitely wrong.

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I measured the resistance of the heater cartridge (the two wite insulated wires) and it is 0.03 ohm.

 

This is way too less, it is just like a short...

I measured mine and I have a bit more than 10 Ohms, which correspond approximately to a 35W cartridge

IMG_1204.thumb.JPG.e5f93fc86acbaf9de7940870205c33f0.JPG

.

Looks like you need a new heating cartridge (or there is a short somewhere in the cable)

IMG_1204.thumb.JPG.e5f93fc86acbaf9de7940870205c33f0.JPG

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