LASER always on CNC/LASER mode-couldn't turn off
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@t3p3tony I have plugged this to the duet ex header.
in the CNC mode even the pin 8 is not connected the laser firing. but, when i switch to laser mode it is not firing.
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@sarvan I can't tell from the pictures if pin 8 on the expansion header is connected to the correct pin on the DuetLaserPWM board.
@sarvan said in LASER always on CNC/LASER mode-couldn't turn off:
when i switch to LASER mode also the laser firing continuously. i could not turn off the laser using any commands(M5, M5 S0)
@sarvan said in LASER always on CNC/LASER mode-couldn't turn off:
when i switch to laser mode it is not firing.
Is the laser firing all the time in laser mode, or not at all?
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@t3p3tony yes always firing in the laser mode.
I thought could be the chip may be issue on the duet laser pwm board. So, I have hooked up another one.
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@sarvanin this board also the same thing. Laser firing continuously can't turn off.
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@sarvan what about with the pin on Pin 8 disconnected?
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@t3p3tony pin 8 connected to duet laser pwm board
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@sarvan let me take some more clear pics and infos tomorrow
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@sarvan yes, so what i wondered was if the laser is still firing with pin 8 not connected (but with all the other pins still connected.
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@t3p3tony here my connection to the duet from pwm board
When I switch to laser mode, the laser firing could not turn off by any code (M5). then again if go switch to CNC mode also laser is still firing and could not turn off.
if I unplugged the Pin-8. the laser is not firing.
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@sarvan thanks, can you try the following. in your Laser mode config.g, I am not currently looking at the CNC config.g so lets put that aside for now until we have the laser working.:
M452 C"!exp.heater3" R255 F200If that that does not make the laser work as expected then Instead of connecting to pin 8 on the expansion header, try connecting to pin 13 and change the laser config to use heater4.
M452 C"exp.heater4" R255 F200Also can you confirm this turns on as soon as the printer boots, and not after (say) homing or some other action?
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@t3p3tony Thanks. let me try these step and check
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@t3p3tony No luck on either way. i have tried those steps you have mentioned.
I have checked connections continuity. everything is fine.
Bu, i have a doubt. once if i configure a heater pin say exp.heater3 and i checked the voltage it shows 0v. but, not configured exp. heater pins shows 3.some volts. it this normal?I have only the laser config files in my duet. when I switch on the duet . the laser starts to firing.
When in CNC/LASER mode- not firing in CNC mode. if I switch to laser mode it starts to firing.(and if i switch back to CNC mode also still the laser is firing)and I have checked the voltage coming through the pwm port from the duet pwm board it shows 7.2V.
so, I am going to buy a connecter type 74hct0-https://www.tandyonline.com/74hct02-quad-2-input-nor-gate.html to try out wiring manually.
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I have tried manual connections as well. it doesn't work. Any other suggestions @T3P3Tony ?
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did you ever figured that out? I am running on the same issue here, although when I unplug the pin on exp.heater3, the laser fires up anyway...
https://forum.duet3d.com/topic/26245/laser-cnc-macros-for-rrf3-on-workbee/4?_=1638642690083
