Murphy's law, road to the platypus

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matteej
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Re: Murphy's law, road to the platypus

Post by matteej »

Some more problems have appeared:
-the table heater/extruder heater some times randomly stops after a while
-random end point signals causing x or y shift
-some times a strange smell comes from the cirquit board (burning stuff?)

I think my RAMPS is broken. (it's not the fan because the problems still occur when I use a big fan pointed ad the board)

has anyone else encountered this by any chance?

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gfeliksdal
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Post by gfeliksdal »

Hi matteej, the random heater stops sounds like a short circuit or a failing MOSFET on the ramps board. The burned smell is not a good sign.

The random x,y shift could be because of loose contact on opto endstops screwterminal, loose connector on the ramps board or the wires are broken somewhere but that's most unlikely for the x-axis.

matteej
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Post by matteej »

Is there a way for me to fix the MOSFET, or should I send it to Utrecht?

the y-offset might be explained by the location where the hot end dumps his first pile of plastic (close to the edge). But the wire thing is also possible due to the problem previously being fixed when I moved it to a new location...

matteej
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Post by matteej »

There it is :)
I probably have had every possible problem by now...
The screw is actually stuck, so I had to cut the wire :P
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gfeliksdal
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Post by gfeliksdal »

Hmm, this is something I haven't experienced yet...Do you maybe have a short on the heated bed? Otherwise I cannot explain it. Please send over the board and I'll have it fixed for you.

matteej
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Post by matteej »

I don't think that it's a short @ the heated bed. It would explain a lot though. No wires are touching the bed. Maybe a resistor is broken?
I think it's just my aura. I e-mailed you earlier that I will send it asap.
By the way: if you ever need to stress-test a new design, just place it in my vicinity :P


Mister multimeter says:
hot end: 6 Ω
bed:1.2 Ω

Trnquill
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Post by Trnquill »

Could there be a short in some point of the wire when the bed moves? That would explain why it failed suddenly. Resistors are very unlikely to fail all of a sudden.

matteej
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Post by matteej »

Good thinking, But I already checked that

matteej
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Post by matteej »

Just connected the new circuit board that arrived in the mail today, and my printer works perfectly once more :)

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