Random Smart Effector flashes
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Give it the old disassemble and reassemble? While it's apart take some photos of both sides of the PCB for us to see?
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sure here it is
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Is that a scuff on the traces of the strain gauge?
If you inspect the surface of the PCB closely do you see any scratches?
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this is 60X
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That does look like some damage.
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that means i need to buy a new one or this can be fixed ?
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@sankafola said in Random Smart Effector flashes:
or this can be fixed ?
depends on how handy you are with a soldering iron; you could try to take some abrasive to the area and abrade off the blue layer getting down to the copper traces and soldering some bridges across.
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@bearer That's more optimistic than my answer was going to be.
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@Phaedrux said in Random Smart Effector flashes:
@bearer That's more optimistic than my answer was going to be.
i've been around too much bob the builder watching little people - the optimism seems to rubs off no matter how hard i try to resist!however no doubt about it, its fiddly work, but certainly possible.
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this pic are x60 times the size , my iron is bigger than 2 lines no way to solder
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@bearer the idea is to solder the cut off lines right /?
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@sankafola said in Random Smart Effector flashes:
this pic are x60 times the size , my iron is bigger than 2 lines no way to solder
if its just a hairline break in the trace you'd probably be okay with some tacky flux and just dragging the tip across with a little solder on to bridge the gap; but some experience would help
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if you have a meter you could try measuring the resistance across as shown on the back of the board? (power off)
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you mean U3 ? and U1 ?
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close up: (edit: maybe not having it mirrored helps..)
R11, and R14 as indicated by the tall elipses.
then compare to the other half of the bridge on R11 and R13 as indicated by the wide elipses?
B and T on the schematic are essientially
10kresistors in the form of PCB traces, and you're trying to measure if they are different:
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31.5 ohms and 34 ohms
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@bearer R 11 red to black R 14 is 31.5 and red to R13 is 34 ohms
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@sankafola said in Random Smart Effector flashes:
@bearer R 11 red to black R 14 is 31.5 and red to R13 is 34 ohms
to the top strain gauge is 31.5 and the bottom is 34; not convinced the traces in that strain gauge are broken - but probably best to see if the Duet people has something to say about it before drawing conclusions
(I'm usually in the "know enough to be dangerous" category..:) -
Tf the top and bottom traces compete read ~30Ohms each then the score has not gone through them completely.
Have you tried adjusting the sensitivity down to see if you can get a range that it triggers reliably when it taps on the bed (be careful, maybe hold a hard surface higher for initial tests and be prepared to cut power).
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it is working but sometimes it just flash by itself and i dont think any traces of touch on these gauge is doing it because if it is why its not doing it all the time ??!!
