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    matt3o

    @matt3o

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    Best posts made by matt3o

    • RE: Slice engineering/Mosquito hotend thermistor settings

      I have a slice thermistor too and my educated guess is that it's not reliable at (very) low temps. It makes sense being a thermistor for high temps. I added H6 option to add 6 degrees in the low end, but it's purely cosmetic.

      I checked with a thermal camera and I'd say as soon as you reach 100C the reading is accurate.

      posted in Duet Hardware and wiring
      matt3o
      matt3o
    • RE: 3.2 heating failed, print starts anyway - bug?

      @Phaedrux before the auto-tuning I tried a second time manually to see if values changed. In doing so I believe I've found the problem.

      The new values are M307 H1 R2.9 C204.0:102.0 D4.00 S1.00 V24 that are very close to the previous ones and indeed I got a fault again BUT it works perfectly if I remove the second C value.

      So it seems that at least the toolboard has some issues with the second cooling time constant, removing it solves the issue (or at least it doesn't trigger the issue).

      Remains that the duet should not fault without error.

      posted in Beta Firmware
      matt3o
      matt3o
    • I thought it was z wobble...

      So I got this texture on a corexy I've built. It's 3x leadscrews+rails.

      IMG_20200729_133139.jpg

      The pattern looked very regular, so I thought z wobble.

      Changed z motor mounts, leadscrews, couplers aaaand... same result. Nothing changed at ALL.

      Pulled the trigger and bought a digital microscope.

      I printed a 1-wall cube. This is the result of two opposite sides (sections).

      2020_0310_233125_009.JPG

      2020_0310_233102_008.JPG

      What the hell is going on? The wobble in just on one side of the wall?! Help me Duet3d Forum, you are my only hope!

      Extruder is bondtech. Extruder motor I tried with a 1.8 moons and a 0.9 LDO. Nozzle is brand new high quality. If I change layer height the "wobble" seems to be the same (that's why I thought it was caused by the z axis).

      posted in Tuning and tweaking
      matt3o
      matt3o
    • fans with shared positive

      I have 2 part fans connected together and 1 thermally controlled tool fan, they are all 12v connected to the duex5. I'm in a corexy setup and thinking of reducing the number of wires that go from the head to the duetwifi/duex5.

      It is my understanding that the positive lead is shared with all fans. My idea was to use just 1 pos and 2 negs. On the duet side I'm connecting the 2 part fans together to one header (+ and -) and the tool fan to another header (just the negative since the positive is shared on the other header). Does it make sense? Does that impact on the total max amperage? Just wanted to check this config with you before burning my duet 🙂 Thanks!

      PS: I wanted to add that both this forum and the wiki are an incredible source of knowledge, I was able to go from zero to full functioning corexy by just RTFM 🙂 so thanks guys!

      posted in Duet Hardware and wiring
      matt3o
      matt3o
    • RE: WiFi Issues - "Network Error" on uploading almost every file

      okay I was ready to swap the wifi module but before that I tried to just "extend" the antenna... believe it or not it worked. I hadn't a single disconnect since

      IMG_20191231_153146.jpg

      Basically cut the onboard antenna and soldered a new one. The antenna must be of a very specific length (check 2.4 antenna length) but apart from that it's a 5 minutes hack.

      Now, I don't suggest to anyone doing that... but it worked for me.

      posted in General Discussion
      matt3o
      matt3o
    • RE: I thought it was z wobble...

      @arhi said in I thought it was z wobble...:

      I can't see from the images, is the issue parallel to the XY plane or is it under angle)

      they look pretty much parallel.

      @mrehorstdmd said in I thought it was z wobble...:

      So the line width is varying but only to one side...
      Is the hot-end perpendicular to the bed?

      yes but the width variation is not always on the same side. if the head wasn't leveled shouldn't the wavy lines be always on the same side?

      but I'll double check that. Thanks!

      How tightly screwed down is the drive gear adjustment screw on the extruder?

      I tried to make it very loose and very tight but I can't say I noticed much difference.

      Are the drive gears clean?

      Brand new.

      How consistent is the diameter of the filament you're using?

      I'll double check that but it is supposed to be good quality.

      Are you using any pressure advance or nonlinear extrusion?

      No, I disabled everything while testing.

      PS: just wanted to thank you @mrehorstdmd for your great blog, I've built my printer mostly thank to your posts

      posted in Tuning and tweaking
      matt3o
      matt3o
    • RE: External 5V source through duet3?

      just power the rpi separately, if the duet3 is already powered via 12-36v you don't need to send the 5v back from the rpi to the duet.

      I haven't looked into it, but I'd think you need a common ground for the main vin and the rpi 5v. I bet either the forum or the wiki have the answer to that.

      posted in Duet Hardware and wiring
      matt3o
      matt3o
    • RE: PrusaSlicer with enhanced precision and removal of odd flow math

      this is very interesting, following this thread.

      I'll have a look at your code soon and possibly compile it on Linux.

      Keep up with the good work

      posted in General Discussion
      matt3o
      matt3o
    • RE: BOx Large Format DIY Printer

      your build is really something. I'm particularly impressed by the tidiness and wires routing

      posted in My Duet controlled machine
      matt3o
      matt3o
    • RE: I thought it was z wobble...

      @mrehorstdmd said in I thought it was z wobble...:

      @matt3o Thanks!

      Is there any play in the extruder carriage bearing block or in the mounting of the X axis rail?
      Are pulley and motor mounts solid?

      the extruder is mounted on hiwin rail+carriage and I'd say it's pretty solid. The pulleys are mounted on shoulder bolts secured on top and bottom.

      The only thing I'm not sure about is the belt tension. It feels very tight on the short side (on the X connecting to the head) and slightly floppy on the long side (on the Y). It's a 400x400 printer. But I don't see any vertical banding... so I guess it's okay

      posted in Tuning and tweaking
      matt3o
      matt3o

    Latest posts made by matt3o

    • RE: Now this is interesting, 45 degree tilted nozzle

      interesting, did they develop a slicer too?

      posted in 3D Printing General Chat
      matt3o
      matt3o
    • RE: Overpowered heater

      @printthatthing no problem, the forum is really a gold mine of tricks and workarounds (often better and more up-to-date than the wiki). Unfortunately I find the search not very good.

      What I do is searching the forum via google like so:

      https://www.google.com/search?q=Warning%3A+Heater+appears+to+be+over-powered+site%3Ahttps%3A%2F%2Fforum.duet3d.com

      happy printing!

      posted in Tuning and tweaking
      matt3o
      matt3o
    • RE: Overpowered heater

      you can find multiple references to that warning on the forum. Here's one

      https://forum.duet3d.com/topic/7971/warning-heater-appears-to-be-over-powered?_=1611391114818

      posted in Tuning and tweaking
      matt3o
      matt3o
    • RE: Microstepping (interpolation)

      @deckingman I see a lot of people using 128 microsteps (with interpolation) on XY in corexy. I don't know if it's because some extensive testing or it's just psychological 🙂

      I guess it's all down to how good the driver is at interpolating...

      posted in General Discussion
      matt3o
      matt3o
    • RE: Duet3D 6HC + Toolboard missing filament on curves

      ohmy I thought I was going insane until I saw this post.

      I thought it was a problem with my extruder motor or the extruder itself... or the filament tensioner... I went ahead and recabled everything and twisted the CAN data wires, added ferrite bead... thanks god I saw this post before I rebuilt my printer all over again 😄

      This is just to say that I'm experiencing the same issue with a toolboard.

      posted in Tuning and tweaking
      matt3o
      matt3o
    • RE: CoreXY vibration and noise at specific speeds

      @engikeneer I actually tried that and strangely enough it doesn't work... that is very weird as it doesn't resonate in diagonals so the problem seems to be in the interaction between the motors.

      PS: also belt tension doesn't seem to effect much if at all

      posted in Tuning and tweaking
      matt3o
      matt3o
    • RE: CoreXY vibration and noise at specific speeds

      okay more testing today. I played with stealthchop and spreadcycle but really nothing has the slightest effect on this issue. Also acceleration and Jerk don't play any role in it. Really the only thing that works is setting the amperage to half what it is needed.

      I also tried with a different set of motors and resonance changed and it's to reasonable levels... but I can't use them in "production" because they are way underpowered for my build.

      So I guess the only way is to buy new motors and hope they will work.

      I have a rather big corexy (40x40cm), wondering if using a 9mm belt would change anything... or maybe nema23.

      gosh this hobby is frustrating.

      posted in Tuning and tweaking
      matt3o
      matt3o
    • RE: CoreXY vibration and noise at specific speeds

      so, I tried with bigger/sturdier XY motors brackets and also with some dampening material but nothing seems to solve this issue. I made more tests and the problem starts at approx 3800mm/m up to about 4600.

      If only one motor moves (any of them) the problem doesn't come up. If both moves especially in straight lines it's really bad (I can feel the whole printer vibrating)

      Nothing that I tried seems to have any effect except reducing amperage. I have 2amps motors that I run at 1.4. Running them at 1amp reduces drastically the resonance.

      Any suggestion?

      posted in Tuning and tweaking
      matt3o
      matt3o
    • RE: 3.2 heating failed, print starts anyway - bug?

      @Phaedrux before the auto-tuning I tried a second time manually to see if values changed. In doing so I believe I've found the problem.

      The new values are M307 H1 R2.9 C204.0:102.0 D4.00 S1.00 V24 that are very close to the previous ones and indeed I got a fault again BUT it works perfectly if I remove the second C value.

      So it seems that at least the toolboard has some issues with the second cooling time constant, removing it solves the issue (or at least it doesn't trigger the issue).

      Remains that the duet should not fault without error.

      posted in Beta Firmware
      matt3o
      matt3o
    • RE: CoreXY vibration and noise at specific speeds

      I have a very similar issue.

      At around 50mm/s the printer starts resonating. It doesn't do that at any other speed. I was about to post a message about that, but I'll post my findings later today here instead.

      In the meantime you may try to change the microstepping.

      posted in Tuning and tweaking
      matt3o
      matt3o