Random Smart Effector flashes

A Former User

@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

A Former User

if you have a meter you could try measuring the resistance across as shown on the back of the board? (power off)

sankafola

you mean U3 ? and U1 ?

A Former User

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 ~~10k~~ resistors in the form of PCB traces, and you're trying to measure if they are different:

sankafola

31.5 ohms and 34 ohms

sankafola

@bearer R 11 red to black R 14 is 31.5 and red to R13 is 34 ohms

A Former User

@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..:)

T3P3Tony

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).

https://duet3d.dozuki.com/Wiki/Smart_effector_and_carriage_adapters_for_delta_printer#Section_Programming_the_sensitivity

sankafola

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 ??!!

sankafola

@T3P3Tony am using SKR 1.4 Turbo not duet , so my MOD pin is not connected to anything right now ,

let me just explain what is the issue i see , the smart effector works fine and do auto claib and all is good but all of sudden it start to flash even if its not doing anything , if i reboot the printer and it become normal again

sankafola

@bearer that is exact what i messuered i wish you put that first lool but i found it with my cheap microscope

A Former User

@sankafola said in Random Smart Effector flashes:

@bearer that is exact what i messuered i wish you put that first lool but i found it with my cheap microscope

shouldn't listen to random strangers on the internet; btw I've got candy!

(sorry, I just randombly stumped onto the post where it was assumed damaged, and worked back to look at a way to verify as repairs seemed unlikely)

sankafola

@T3P3Tony so what do you think it is ?

dc42

Does it make any difference (to the random flashes) whether the motors are energised or not?

Does it make any difference whether the heated bed is on or off, or how close to the bed the effector is?

If you remove the effector from the printer, apply 3.3V or 5V to the Vcc and ground connections of the white 8-pin connector with nothing else connected, does the green LED still flash randomly when the effector is still?

sankafola

@dc42 i tried that and no flashing , i just did now auto delta calibration and went fine

G32
Calibrated 8 factors using 16 points, (mean, deviation) before (-0.174, 0.045) after (-0.000, 0.021)
Auto calibration successful, deviation 0.021mm

then did mesh level and it stopped saying

G29
Error: Z probe already triggered before probing move started

then i just reboot the printer then i did G32

G32
Calibrated 8 factors using 16 points, (mean, deviation) before (-0.212, 0.042) after (0.000, 0.019)
Auto calibration successful, deviation 0.019mm

and then mesh 170/30

G29
101 points probed, min error -0.571, max error 0.685, mean 0.033, deviation 0.242
Height map saved to file heightmap.csv

so it does it every 2nd time i ask for mesh g29

its random

dc42

@sankafola said in Random Smart Effector flashes:

@dc42 i tried that and no flashing , i just did now auto delta calibration and went fine

I presume you mean that when the effector is connected to 5V or 3.3V only, the random flashing ceases. That suggests that the problem is either mechanical interference (i.e. vibration - which is why I asked if turning the motors off made a difference) or electrical interference (most likely from stray magnetic fields - hence my question about the bed heater).

Do you have an extruder mounted on the effector, or is it a bowden system?

sankafola

@dc42 its flaying extruder with 20 cm tube , the thing is if its the bed electromagnet it should affect it all the time not just random , here is my setup

dc42

Does the random flashing stop when you raise the effector well above the bed?

sankafola

@dc42 no the random can happen also while its home which is very far from the bed

A Former User

the light shown is that led's on/near the effector? does it help to turn lights off?