BLtouch randomly decides to not work today
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If it's still doing the startup self test then the mechanism is still functional.
If you send M401 and it doesn't deploy, and you haven't changed your config at all, that would seem to leave the wiring between the servo pin on the Duex and the BLtouch as the likely culprit.
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@Phaedrux i just actually checked each wire individually with a multimeter and all show continuity, so i guess i can try a different servo output on my duex, maybe something happened. other than that idk, maybe the bltouch died but still self tests? i have another bltouch on my other machine, but i really dont want to take it off to rule out the bltouch unless thats my only option. and i also just double check that i have 5v and 2.5v out the end of the harness
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Testing with another bltouch would help eliminate the possibility the touch is bad. But the self test working means it's probably not getting the signal.
Trying a different pwm pin on the duex is another good test.
Bltouch wiring is notoriously bad and responsible for most issues.
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just tested the other bltouch and still no deploy. is there a way for me to know if the duet is physically sending the deploy signal on the pwm signal wire? should be the left pin of the three? i edited the other reply but i do have a good 2.5 and 5v to the bltouch.
and to switch pwm output i should only have to change duex.e2heat to duex.e3heat for pwm2?
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@deltajegga Have you check the deployprobe.g file for errors? The self test will still work without deployprobe.g or retractprobe.g.
Try
M280 P0 S10 ; deploy BLTouch -
yeah, it just does nothing, everything else is working except the deploy and retract of the probe, if i pull the probe down manually the red light turns off but there is no blue light. also i though it should flash red if you pull it down manually?
just measured signal voltage on my other printer and its yellow signal pin is at 3.33 volts, and this is at 2.5v. does this matter?
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@deltajegga
Please check the configuration of BltouchM950 S0 C"duex.e2heat" M558 P9 C"zprobe.in+zprobe.mod" H5 F200 T10000should be
M950 S0 C"!duex.e2heat" M558 P9 C"^zprobe.in" H5 F200 T10000Background:
https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_Software_setup_RepRapFirmware_Num_3
https://duet3d.dozuki.com/Wiki/RepRapFirmware_3_overview#Section_Pin_names_for_Duet_2_WiFi_Ethernet -
@DIY-O-Sphere i tried that and still no dice, i mean i dont see how that could be the issue if its been working since may. i dont fully understand how all of that is supposed to work, but it was working whit the config as is.
quick recap
-haven't touched config in months
-bltouch is confirmd good
-wire harness shows cont on all wires from duet to probe plug and a strong 5v and 2.5v to the probe
-tried changing line 57 to duex.e3heat and tried pwm2 plug on duex
-noticed that my other printer on RRF2 the signal pin is at 3.33v and this one is at 2.5v (the signal to deploy the probe, not the hall sensor signal)
-DWC2 says zprobe 0 whether i manually pull the pin down or up.
-am confused... -
@deltajegga
Maybe you should try to plug the signal pin directly to the Duet -
its been a while but you cant with the duex expansion ribbon installed correct? dont the servo wires plug into the large expansion heaader?
i should clarify that i mean the signal wire for the servo wires, not the signal for bltouch prob position.
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@deltajegga
I'm not an expert for duex, but as far as I know, the signal for the heater is inverted. Maybe there is a defect on the board... -
(UTC+1)
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@DIY-O-Sphere something at add, im not 100% sure, but i dont remember the leds being lit up on the duex e2,3,and4 heater teminals...maybe they were, idk. but it seem like they shouldn't be.
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@DIY-O-Sphere connected to PWM1 on duex
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@deltajegga
Pwm and heaters are shared on the duex -
@DIY-O-Sphere so that would make sense that the duex e2 heater led is on, but i wonder why 3 and 4 are on.
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@deltajegga
You are shure you haven't updated firmware? On some releases you had to free up the heater channels for use with the BLtouch. -
yep, ive been printing smoothly since may.
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@deltajegga
Maybe the jumper?
https://forum.duet3d.com/topic/10654/bl-touch-and-the-duex-5/64
Also read the first post. For me that sounds similar...(UTC+1)
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@dc42 do you know the pulse length for the pwm signal to depoly and retract the probe on PWM1 on duex? i have an oscilloscope i can hook up. it seems as its not sending the signal anymore. and also is it supposed to be 3.3v or 2.5v? and does it go high or low to deploy the probe?
