Consequtive Printing Problem

K8200 3D Printer K8200 - Issues while printing
1

Hi friends,

I am using e-sun PLA black material.
205-210 C nozzle temperature is aranged for good print quality.

Let me write down the story step by step:

  • When I started printing last night I started with 205C everything was Ok until software error. due to error printing has stopped.
    Than I removed the printed section and cleared the print bed. And started printing again. (By manuel control I hold the temp at 205C while clearing the bed)

  • But for this print 205C was not enough and I raised up temp to 210C by manual control. with 210C print quality was better.
    However, while printing I realised that I am printing wrong model and I stopped printing with emergancy stop.

  • Again I had removed the printed section. And started printing again.(By manuel control I hold the temp at 210C while clearing the bed)
    But for that case, 210C was not enoguh for good printing and than I again raised it up to 215C. As a result I got my part.

In the past this story was the same for some case.
And also, after printing a part, I couldnt print the new one without raising up the extruder temp.

what do you think about this situation?

regards,

2

Hi There

I have found that when I stop a print, I have to disconnect in Repetier, reset the printer board, then reconnect in Repetier. If you do this quickly, it only takes a few seconds for the temperatures to come back up.
If I don’t do this, then either the extruder goes in reverse, or it will not extrude properly. Possibly this is to do with the temperature!

See if it works for you.

Cheers
Peter

3

Last night I have faced with the same problem.

I printend one part. And just 2 minutes after I started new print job.
But the second one has not printed at quality of first one.

I also think that temperature sensing is the main problem.
I will try further prints with disconnetcting and resetting the printer.

4

I suspect that the original psu from Velleman simply can not hold the power for a long time.
so to protect the psu, drops power.

Second, You really should cool the stepper drivers wityh a large or multiple small fans also for the same reason.

Check psu temp and stepper controllers temp, if hot time to switch of the K8200 or modify it , give the heatbed a seperate temperature controlled 24V PSU 10 amp
so that the original velleman psu 15V 6,6Amp has less to do.

5

I get really good PLA adhesion to the bed glass at 70C (first layer), but it’s very sensitive to nozzle height. I often have to tweak the height between prints as various parts of the machine heat up and change dimension.