Prnit layers are not one above the other

Hello forum,
first, i have to excuse for my bad english,and i don´t trust the google translator, so i hope, i can explain my problems with my school english.
we use the velleman k8200 printer, but if we want to print an 3d-object, the printer makes some failures.
the first,second,third and the fourth layers are correctly printed, but then the printer jumps to another place on the heating bed, and prints the other layers.
and in these procedure the layers are skipping all over the heating bed.
in other words, the next layer is sometimes in the left corner, the other layer in the right corner, and so it goes on and on.
we had changed the settings of the printer, but it makes no better printings.
sometimes the prints are worse than the others, that we had make it before we changed the settings.
what can we do, that the printer prints a good and nice 3d-object?

i´m very thankful, if someone can help us.

greetings tiguan

Your English is fine.

From your description it sounds like you did not adjust the stepper motor drivers.
You can find the instructions in this link.
http://www.k8200.eu/manual/printing/?c=002
It talks about them about 1/4 way down the page.
The instruction say to set them to 0.425 volts.
You will find that 0.55 works better.

Hello Wrong Way.
Thank you for your fast repost.
Yes, you are right,we calibrate the motors all to 0.55v ans the printer prints very nice objects.
and thank you very much for help.

greetings tiguan

Glad to hear it’s working for you.

Enjoy!