I’ve just started to use my K8200 3D printer, so I am quite new into this. I have printed about 10 items until now. The results looks good. Even layers and a minimum of loose thin strings.
What I noticed, is that when the printer makes the infill (solid or honeycomb doesn’t matter) in areas that narrows into a corner, the movements of the print bed kind of gets very fast. So fast that it actually goes into resonance and shakes violently from side to side, causing the motors to jump over steps, again causing the X/Y coordinates to move, and then the next layer of the printed object shifts to one side. The situation repeats itself in the next layers, causing the whole object to skew.
I have tried to reduce the print speed, as low as to 50%. It only slows down the time to print the object, but does not help the problem about the whole X/Y drivetrain going berserk when making infill in small areas.
Anyone dealing with the same kind of problems?
[quote=“tholsen”]I’ve just started to use my K8200 3D printer, so I am quite new into this. I have printed about 10 items until now. The results looks good. Even layers and a minimum of loose thin strings.
What I noticed, is that when the printer makes the infill (solid or honeycomb doesn’t matter) in areas that narrows into a corner, the movements of the print bed kind of gets very fast. So fast that it actually goes into resonance and shakes violently from side to side, causing the motors to jump over steps, again causing the X/Y coordinates to move, and then the next layer of the printed object shifts to one side. The situation repeats itself in the next layers, causing the whole object to skew.
I have tried to reduce the print speed, as low as to 50%. It only slows down the time to print the object, but does not help the problem about the whole X/Y drivetrain going berserk when making infill in small areas.
Anyone dealing with the same kind of problems?[/quote]
Try reducing max X/Y jerk to 15 or even 10 MM/s²
And where in the world do I change that values? 
I have tried to visualize the problem here. This cylinder is 4,2 mm wall thickness. It is when it makes the light-blue infill in the tiny space between inner and outer lines, that the printbed goes crazy.
I have found a function in Repetier menu “Config” and “Firmware EEPROM configuration”, and it opens a window where every value is set to 0. It has the values “Maximum X/Y jerk” but it is also set to 0. I think it does’nt look right that every value is 0 ? I have tried the “Reload config” as I assume it will load the current config from the EEPROM in order for me to change it and save it again, but nothing changes after reload, still every value is set to 0.
[quote=“tholsen”]
I have found a function in Repetier menu “Config” and “Firmware EEPROM configuration”, and it opens a window where every value is set to 0. It has the values “Maximum X/Y jerk” but it is also set to 0. I think it does’nt look right that every value is 0 ? I have tried the “Reload config” as I assume it will load the current config from the EEPROM in order for me to change it and save it again, but nothing changes after reload, still every value is set to 0.[/quote]
to make the firmware config work in repetier you have to uncomment the following lines in marlin’s configuration.h
and reflash the firmware :
//define this to enable eeprom support
#define EEPROM_SETTINGS
//to disable EEPROM Serial responses and decrease program space by ~1700 byte: comment this out:
// please keep turned on if you can.
#define EEPROM_CHITCHAT
cheers,
Christian
I am totally new to this machine, and got no clue at all, where to find the configuration.h file, if it even is a file and how to flash the firmware?
Is it done from Repetier Host or did I have to use some other software?
I have tried to remove the glass-plate, and it helped a bit, but still a problem with the bed shaking like an earthquake.
[quote=“tholsen”]I am totally new to this machine, and got no clue at all, where to find the configuration.h file, if it even is a file and how to flash the firmware?
Is it done from Repetier Host or did I have to use some other software?
I have tried to remove the glass-plate, and it helped a bit, but still a problem with the bed shaking like an earthquake.[/quote]
Compiling and flashing the firmware needs to be done with Arduino IDE Software version 1.0.6.
You can download it here : arduino.cc/download.php?f=/ardui … indows.exe
You will also need the Marlin firmware files from the velleman site.
If you have arduino installed and the firmware filed unpacked you can open the marlin.ino
in Arduino IDE then you are able to change the code as i mentioned.
If you need more help, let me know.
cheers,
Christian
There are details here on velleman site
k8200.eu/manual/printing/?c=007
I have tightened up the X-axis belt to what I will think is near the absolute maximum, and it really helped a lot. The printbed still shakes, but now in a controlled way, and not going into violent resonance, causing the motors to jump over steps.
So for now, its a succes If I experience problems and tightening up the belt was not sufficient, I will try to change and flash the firmware, but for now it really looks promising.
Thank you all for the responses
