Acceptable deviation after auto-calibration?



  • Hi all,
    As I am new to deltas, Duet and RepRap firmware I have been sifting through endless chunks of text both here, at RepRap forums and wiki getting to know the inner workings of this new stuff. I have been building, tweaking and using cartesian machines for a little more than two years using both Arduino and Smoothie based control boards.

    I have just finished a custom delta based on the Kossel mini design but key parameters differ from f ex T3dP3D Mini Kossel. After +20 hours of tinkering I have been able to finally do an auto calibration using the G32 in the web interface (13 points, 6 factors) and iterated to a deviation of 0.038. It doesn't seem to get better than that.
    Is this an acceptable amount of deviation?



  • i have 0.100 deviation and i print very high quality the limits are the sensors you use i run duet with FSR and since i have a filaprint everything sticks and the first layer looks like its molded just try to print the best deviation i have achieved was 0.078 and it makes literally no difference to me even when using 0.05 layers i would say try a few prints and see what you can do



  • @Gosu:

    i have 0.100 deviation and i print very high quality the limits are the sensors you use i run duet with FSR and since i have a filaprint everything sticks and the first layer looks like its molded just try to print the best deviation i have achieved was 0.078 and it makes literally no difference to me even when using 0.05 layers i would say try a few prints and see what you can do

    OK, thanks. It seems that I'm on the right track. I also use FSRs with a small JohnSL controller board. I find that there is real challenge to get the glass plate fixed without interfering with the operation of the FSRs so I designed a tailor-made bed holder + clip and I'm in the progess of adjusting it just right at the moment. I'm not very far from my first delta-made print now…

    BTW, do you use bed levelling also (G29)?

    /Thom



  • Yes thats what im saying its very hard to get a low deviation i have a heavy aluminium heatbed wich makes triggering a little bit delayed but after adjusting trigger heights its perfect and i can print whatever i want on my rostock max v2 310 mm build plate just g32 before each print and swoosh


 

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