I have currently the problem that my filament transport doesn´t work proper.
After some minutes of good printing, not enough filament comes through the transport.
I dismounted an mounted again the transport mechanism. I made some colour points on the filament pulley, so I see it more easy if it turns or not.
If I grap the filament below the transport and push it constant softly into the mechanism, I have again a good printing.
My suspicion is, that the spring is too hard.
It es even nearly impossible to push the lever when inserting new filament.
So may be different springs where inserted in some kits, so someone has softer springs then others?
So, has anyone made similiar experiences? Has anyone ideas what to do?
Does voltage too high or too low also effect the extruder motor? I thought this only affects shifted layers.
So, you assume if the voltage is too low, the motor is not powerful enough to turn the filament or the voltage is too high, so the motor makes short breaks because the driver board is overheated and has to cool down, did I understood you so correctly?
Indeed, the voltage was wrong. It was somewhat about 1,5V instead of 0,9…
The range of correct voltage from 0.89V to 0.925V is very close, specially with this trimmer is really so “fragile”, as it is described in the FAQs. A fraction of a degree too much left or right turned and you are again out of this narrow window.
But I managed it to get the voltage proper and the printing was good again.
But I made later the experience, that objects like figures in scale 1:18 and more tiny, cause problems when the layers above the shoulders are printed. The neck and the head are little circles < 8mm. And repetier host tries to compansate this by making breaks for some seconds to give the layers more time to cool down.
My theory is, that when the printer starts again after the breaks, the filament transport pushes a little earlier then the head is heated again, so, the Motor draws higher voltage and the motor driver boards shut down for some seconds.
When I built the exlectric parts of the kit, I watched as careful I could, that I was not electrostatic loaded. But at the moment now, I have the doubt that the driver board of the Extruder might caught an ESD damage when I plugged it into the sockets.
The printer runs (despite the above mentioned probl ems), no question, but I think there is a little pre-damage in the motor driver board.
Or is this problem common to others? Printing little objects and getting too less filament?
I think I have to buy just for the case, another motor driver board. The K8400 is still not delivered as a spare part, correct?
So, in the internet I found some offers for a K8200 motor driver board. Would it fit to the K8400 electronic?
[quote=“Heeresflieger1968”]So, in the internet I found some offers for a K8200 motor driver board. Would it fit to the K8400 electronic?[/quote]No the K8200 uses A4988 drivers that are not suitable for the Vertex; You must use this kind of drivers : [color=#408040]DRV8825[/color].