DDEX (dual extruder single printhead) configuration help.
long story short: just set up rat os. I am just trying to add an [extruder1] to the config. pi + btt octopus v1.1
originally I tried to overwrite the regular [extruder] with [extruder0] but kept running into a new error after every save and reboot because I kept finding new places within ratos that [extruder] was split up between.
[extruder] seems to be set up fine with all of the default config files for the hardware - however the rapido file specifies the wrong sensor type. I tried to overwrite the correct sensor type but klipper fails to boot because of the temperature range being too high. the temperature is reading correctly - (it is supposed to be a PT1000 but it is set to 104GT)
similarly my new overwrite that adds [extruder1] is showing a room temp nozzle at over 150C despite the sensor type being correctly applied (ex1 uses a 104NT, not a PT1000).
I don't know why the hotened with the wrong sensor is the right temp but the hotend with the right sensor config is showing such a wrong temperature. beyond that I know I'll probably have some more questions later on.
31 Replies
I absolutely did not have the wires crossed.
that would be too easy for me to gloss over, obviously it could not be that.
printer.cfg please
I'm pretty sure I got it figured out, but doesn't hurt to have a second set of eyes
I would actually like to change [extruder] to [extruder0] someday. ratos just splits up the definition on so many pages I gave up trying to track it all down and left it as [extruder]
You have a bunch of stuff in there you don't need
you should only need this in your user overrides section
[extruder] nozzle_diameter: 0.6 sensor_type: PT1000 pressure_advance: 0.03 [extruder1] step_pin: PG4 dir_pin: !PC1 enable_pin: !PA0 microsteps: 64 rotation_distance: 5.57 full_steps_per_rotation: 200 filament_diameter: 1.750 max_extrude_only_velocity: 120 max_extrude_only_accel: 800 pressure_advance_smooth_time: 0.02 max_extrude_only_distance: 200 nozzle_diameter: 0.6 heater_pin: PA3 sensor_type: ATC Semitec 104NT-4-R025H42G sensor_pin: PF5 min_extrude_temp: 170 min_temp: 0 max_temp: 285 pressure_advance: 0.03 control: pid pid_kp: 28.413 pid_ki: 1.334 pid_kd: 151.300 [stepper_x] position_max: 330
I know, I just copied the whole sections because I wasn't sure what else I might need to change later. Just convenience now with some clean up later.
I also would rather define the pins for the second extruder the same way the first extruder is defined, just for consistency.
HMM
I wonder if I need to adjust the bed probe macro due to the limited X
oh hey, got the 4028's working.
definitely stealing a lot of the idex config
hmm
it moves
everything is lining up now
might not need as much ratos help as I thought
only hurdle now is that I can home all axes but fail to z-tilt the back z motor
alright, yep, I am not finding a resolution for this
although I'm not sure if this is still a ratos thing or just a fix my printer thing
homing all axes works fine, fail the back Z probe during z tilt by getting "no trigger after full movement" and trying to mesh I end up either getting the same "no trigger" error or I start rubbing the pinda across the bed and getting "triggered before position" errors.
searched through older threads but there was either never a fix stated or the fix was something to do with the user's own modifications
okay
changing position min to -10 got me through a tilt
I def need to change the tilt and mesh macros though, as my max X movement is limited
it also took 4 tries, so I'm not looking forward to troubleshooting frame skew and tensioning lmao
okay, and now I should have tilt and mesh sorted.
I... am curious how much this actually affects the system's ability to run tilt correctly since the probe isn't exactly over the contact point
any reason why my hotend fans aren't running?
somehow I managed to get the 4028's working no problem but something is up with the hotend fan. went all the way to 280 before realizing they weren't kicking on.
tested to see if I switched the pins but nope
they are def plugged into pd12 and pd13
you need to specify the
heater on your [heater_fan] see: https://www.klipper3d.org/Config_Reference.html#heater_fanthat was it, I see toolhead cooling fans turn on and off around 50c on the webUI, however physically the fans are still not spinning.
Well, that's an electronics issue (or wrong pins, but you said those were correct)
hey would you look at that
polarity is a thing that matters.
would the best way of setting up the offsets for the second extruder be within slicer or klipper?
I could set a gcode offset for the second nozzle and just run it like that
I don't know if this is a ratos/klipper thing or my slicer but both extruders are spinning/retracting at the same time despite nothing I'm seeing in the slicer telling it to
yeah, I'm not seeing any E1's in the gcode, only E0
check that you didn't use a parallel stepper port
Wow, did not know the octopus had that but sure enough...
They have separate pins and step sticks, is there any way to turn it off? The only board I've used with parallel has one driver to two ports
Oh my God how have I been staring at this thing for OVER A YEAR only just now realizing there are 9 ports and 8 stepsticks
😂
All boards pretty much have those, i don't get it either lol
check if the z steppers are in correct order, use the buzz command
i would also check the leadscrew couplers
Oh
That was fixed in a fix my mesh thread
Realized that I never changed the rotation distance in the config as I'm using tr8*2 screws
I'm still scared to put the second nozzle in
Getting those two extruders level with each other seems like it will be difficult
I've been modifying the new toolhead to have an adjuster plate but that will be some time to finish
yeah, your setup requires patience
do not rush
I've got my two sany denki's configured as part cooling fans and they work fine from the mainsial interface but I'm having toruble getting them to actually kick on during a print when they are supposed to
finally getting around to adding a webcam too... crowsnest log says it sees the cam and has started but 'm not seeing any webcam panels on the dashboard nor any options in the settings.
weird, finally showed up in settings after chanigng the config and srestarting again. was able to 'add webcam' from there and reconfigure the same settings.
yeah okay, I'm still stuck on this.
turns out klipper kinda hates controlling multiple part cooling fans? am I forced to set up some complex m106 replacement macro?
I've been digging through the idex git trying to figure out how helge is doing it but I'm lost.
yep, there it is. a big m106 replacement macro
Tried just using the idex git's 106 macro after removing the idex macro parameters and realized that wouldn't work when I started to think how klipper is supposed to figure out which of the two fans to control at any one period.
Now I'm kinda stuck between either continuing to reverse engineer the idex macros to apply to DDEX or get just the fans configs to work or just develop a new one from scratch.
this is dumb
and does not work
wait
no
this... does work
but I've definitely got the math wrong converting 255 to 1
wait
I just did an S127 command and got 50% speed
so no, the math is right
this works I guess.
huh...
okay
it does work
part fan0 kicked on during the priming blob
but right after the priming blob I get an error:
and the print is canceled. I know I didn't touch the start or priming macros
okay, I can't recreate if I m106 without a P set, a P0, or a P1
but I can trigger it with an M107
oh, I see
I'm not even calling p in the m106, but I am in m107. I don't think I need to convert P-1 into p at all.
this channel i so funny, its like i can listen to your thoughts 
sometimes I think I need help, but I think I'm finding out I just need more time lol
now I'm fighting the slicer sending S244 to my sanyo denki and blasting a PLA test print with too much air lmao
also I totally get now wanting to mess with an existing gcode command but god i wish klipper supported multiple part cooling fans easier
technically you could use 95% of the complete idex code
its not so different from your setup
I really did think about it, but modifying this one macro seemed easier than trying to do the all of the idex macros
I do eventually want parity
also I'm dumb and using a 400 bed in a 400 frame so I can't do wipers/cameras
you can use a servo wiper
camera doesnt need to be isntalled permanently
that is an idea, I also thought about just lining the edge of the print bed with one long wiper "bump", a few other things came to mind...
but ultimately I want to be able to raise/lower the nozzles, and that requires a whole printhead redesign, which allows me to do other things like cutters and wipers mounted on the head. so this is where I'm spending most of my time.
definitly an interestng project
did you considered a rotating toolhead?
where only one nozzle points to he bed while the other is slightly offsetted
oh, I did see a project like that online somewhere
yes, there are some people who already did that, i mean it adds extra complexity to the system, but could work if well executed
yeah, complexity (and by proxy print head weight) is a big concern, every idea I've had so far includes a big risk of feature creep that will slow down development and print time.
one main goal is to not add any additional servos/motors if possible, control most or all actions via cam slams