Possible increase possible 441 points for bed mesh compensation?



  • Hello, I am new to the forums and I am trying to build a printer with a very large bed (~4x8 ft). I am using the Duet Wifi 2 with the 2.04RC1 RepRap firmware. Everything is working fine with the large bed I just need more resolution in my height map so the nozzle can interpolate better. Would this be possible? Thank You!


  • administrators

    Currently the memory for the height map is statically allocated, so I can't increase it without possibly making some users with complex configurations short of memory. I'll look at making it dynamic in RRF3.



  • If you need this many probe points, you need a better bed surface to start.
    Is this still a thermoplastic FDM 3d printer?
    If yes, how uneven is your current build plate? What nozzle/layer height are you using? with 441 points you would still get a probe point every 5.5x11cm.
    If you´re not using giant nozzles that have a higher layer height to begin with (that is tolerant toward a more uneven surface) how long are your print times?
    If you´re not building a large 3d printer with a minimum of good components like a more or less flat build plate, how are you expecting good results?



  • @nitrofreak I realize I need to improve my print surface. I did not know if there was an easy way to increase the points as I improve my build. Right now I am only printing with a 1 mm nozzle , but I have a 300 W heater that can use 2.75 mm nozzles, I am going to switch soon. What layer height would you recommend for a 2.75 mm nozzle diameter?



  • @smp433 said in Possible increase possible 441 points for bed mesh compensation?:

    @nitrofreak I realize I need to improve my print surface. I did not know if there was an easy way to increase the points as I improve my build. Right now I am only printing with a 1 mm nozzle , but I have a 300 W heater that can use 2.75 mm nozzles, I am going to switch soon. What layer height would you recommend for a 2.75 mm nozzle diameter?

    Depending on the resolution i would recommend a 1.4mm layer height.
    I have some experience printing with a 2.5mm nozzle. i printed that with a 0.35mm layer height, primarily for a stronger layer bonding. Works really well.
    With a 1.4mm layer height you have a lot more room for first layer height error.


 

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