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    Topics created by martinv

    • martinvundefined

      Input shaping user interface bug? Or just user confusion?

      Duet Web Control
      • • • martinv
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      Electriceyeundefined

      @droftarts

      That's really good to know, as I def want to implement input shaping and it sounds like the LIS2DW and LIS3DH accelerometers are the way to go. What shocks me is how incredibly inexpensive those are compared to the ADXL345, with
      higher resolution, less artifacts and lower cost seems counter intuitive. 😉

      I'm looking forward to getting this implemented asap, as input shaping seems to be the way to go!

      Many thanks to all for the input- much appreciated!

      Cheers!
    • martinvundefined

      Solution to delta printer falling arms and effector at power off

      My Duet controlled machine
      • • • martinv
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      dc42undefined

      @martinv said in Solution to delta printer falling arms and effector at power off:

      I'm still thinking of neat things to print. Any ideas?

      My delta is my go-to printer. I print everything I need on it, except where I need the slightly wider (300x200mm instead of 300mm round) bed of my tool changer. I've recently been printing tools and jigs on it to aid with assembly of a light aircraft.

    • martinvundefined

      Help identifying connector for Tevo bed cable

      General Discussion
      • • • martinv
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      martinvundefined

      @droftarts the parts arrived in due course and here is the made up adapter cable. I'm happy with it.

      Note to all, this cable carries mains voltage and should be tucked out of the way and safely covered where you cannot touch it. This photo is with the cover removed for photo purposes.

      power-connector-adapter.jpg

    • martinvundefined

      Active chamber heater

      Duet Hardware and wiring
      • • • martinv
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      martinvundefined

      @T3P3Tony The heater is a combined 24V fan and 400W mains voltage heating element mounted towards the top on the left hand side of the enclosure. It brings in air from outside the enclosure, and, while it's not easily visible, the rear of the enclosure hangs over the back of the work bench, so the cooler air lower in the enclosure air exits at that point. I debated for a long time whether to just recycle (reheat) the air in the enclosure, but I hadn't worked with this kind of heater before and didn't know how hot the 'input' air could safely be, so I went for the safe option, and heat room temperature air. It looks like the heater is designed to be mounted on the outside of an enclosure, but I couldn't find any more guidance on the data sheet. This work space is not occupied, so I have no problems with potentially harmful ASA and other particles from engineering filament being blown into the room.

      20241227_170011.jpg

      There is a blower fan that is used for the initial stage of heating in order to mix the air thoroughly throughout the enclosure.

      20241227_170103.jpg

      I have a single DS18B20 temperature sensor.

      I'm using a simple heating thermostat algorithm (bang bang) to turn the heating element on and off. I found the location of the temperature sensor is critical and sensitive. At one extreme, if the sensor is in the hot air stream the heater will of course turn off far too early. At the other extreme, say if the sensor is tucked away in the enclosure frame tubing, the air in the enclosure gets far too hot before the heater will turn off. What I have found is that it's best where it is in the photo. I think it's best to have a sensor that reacts a little on the fast side, and just let the whole setup stabilise for a while, than risk wild temperature swings of a too slow sensor response. Yes, I could implement a PID system, but that would be more work.

      20241227_170131.jpg

      The heater unit spec is as follows.

      20241227_170151.jpg

      As I say, this is not hooked up to a Duet, but the controller does have a serial interface that I designed to work with my Duet equipped machines. I'm hoping that one day I'll have an enclosure ready for those, and can do something similar.

      Incidentally the enclosure is made from 8mm twin wall polycarbonate (roofing material), which is cheap, and for the parts where I want to see in it's made from 4mm Lexan (polycarbonate). This was about the best bang for the buck I could manage here in New Zealand, but it still cost a few hundred NZ dollars (maybe USD$200). The panels are joined together using brackets printed from eSun ABS-MAX which is UL94V0 rated filament. There is also a smoke detector nearby and a second one that is wired to an occupied area.

      Regards,

      -Martin

    • martinvundefined

      Solved Duet 3 Mini 5+ WiFi losing network connection never to return

      Duet Hardware and wiring
      • • • martinv
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      dc42undefined

      @martinv thanks for the update. I'll mark this as solved.

    • martinvundefined

      Duet 3 Mini 5+ Tevo Little Monster conversion

      My Duet controlled machine
      • • • martinv
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      oliofundefined

      @MitchMitch you can generate a basic configuration using the reprap configurator as a baseline, to be tuned to your machine's peculiars

    • martinvundefined

      Which Duet controller for Tevo Little Monster delta printer?

      Duet Hardware and wiring
      • • • martinv
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      martinvundefined

      @jay_s_uk Thanks for the info and @dc42 too. I have just ordered a Duet 3 Mini 5+ Wifi. Exciting!