We bought a mini Kossel 3D printer 2 months ago and are still trying to get it to work. We bought the Mini Kossel from MakerGeek. Below is our Mini Kossel.
This is our mini kossel. One problem we are having is that material does not flow out of the nossel when printing first starts for about 5 to 6cm. Not sure why this is happening?Material should be ready to flow right from the start of the print. Maybe there is a software setting to start the flow before printing starts.
The other problem I am having is the head temperature is set at 250C for PLA. It should only be about 200C for PLA. I have checked the teperature of the head with a thermo couple and the temperature reading is correct. Why this is happening? Printer head is a E3D V6. See picture below.
The other problem I have is that the material stops following after a few minutes. Even thought there is material and the head temp is still at 250.
Hope someone can help. We have pretty much fixed all the other problems. Thank You.
Thank you for your reply K120189 and Birdmun. I will try your feedback and reply soon.
One additional thing that I would like to do is to initially purge some material out, for example at position close to “Y” tower before starting a print; can this be done on the Marlin firmware? I have also bought an UltimakerII and before a print starts it purges out a little material just outside the print area before starting a print. It would be an improvement for the Mini Kossel that I would like to do which I have not been able to work out. Thanks again for all your help.
The slicer actually prints/moves around an outline of the part being printed. This move, as far as I know, serves two purposes. One, it makes sure the print will fit the print bed. And, two, it gets the plastic flowing through the hot end. Your printer also won’t start printing before the hotend is up to temp. If you leave a hotend at printing temp, the plastic will eventually at least leak a bit, I would imagine.
Thank you K12019. I have done what you suggested and the mini kossel works now. Nothing stuck in the nozzle birdmun . The good news is that I can now print at 240C although the LPLA plastic flow seems glazy. This could be due to the head temp being too hot. If I go any lower with temperature PLA plastic sometimes stops flowing out of the nozzle. Also problems faced now is that the PLA plastic flow takes time to start when printing and after printing ends, plastic keeps flowing. I have removed the fan control form the machine and pluged the fan directly into the power supply in oder to solve this problem, but not helping. Has anyone experienced this before?
