I have just completed the Vertex K8400 build, removed the Extruder connector from the printhead and powered it on.
The next step is to check the LCD display but the screen is unreadable. I can see that there is something there but very dim, then I tried to adjust the potentiometer but with no luck.
Then I noticed that when i press the reset button, the text becomes very clear (readable), and that after the releasing reset button the display is readable for a second or so but then the text fades out (or dims). The backlight of the LCD remains the same.
I have just completed the Vertex K8400 build, removed the Extruder connector from the printhead and powered it on.
The next step is to check the LCD display but the screen is unreadable. I can see that there is something there but very dim, then I tried to adjust the potentiometer but with no luck.
Then I noticed that when i press the reset button, the text becomes very clear (readable), and that after the releasing reset button the display is readable for a second or so but then the text fades out (or dims). The backlight of the LCD remains the same.
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Why did you disconnect the Extruder connector from the printhead?
When I first powered up my K8400, I actually forgot to put the connector on, and except for three red leds, it was doing nothing. My advise is to just connect the printhead and try again.
Remove all steppers except the one from the Z axis.
Then try this one in the other axis and check if they’re working (better use Repieter to home each axis separately - they might not move if you don’t home them first). Leave the extruder for later.
If all axis are moving correctly then plug the other drivers one by one in one new axis and check if it’s moving until you get all 3 axis working.
End with the extruder.
So you’ll know if one (or more) stepper driver is defective.
I just tested all the stepper drivers and there are 3 faulty ones. Using the Z-axis I swapped them one by one, and only one functioned properly. Placing the working stepper driver in the X-axis, Y-axis and the Extruder positions also worked. So it’s really the stepper drivers…
I already checked the voltage (calibration) of the stepper drivers but they where all within the limits.
Can I do anything else or should I request new ones?
I just tested all the stepper drivers and there are 3 faulty ones. Using the Z-axis I swapped them one by one, and only one functioned properly. Placing the working stepper driver in the X-axis, Y-axis and the Extruder positions also worked. So it’s really the stepper drivers…
I already checked the voltage (calibration) of the stepper drivers but they where all within the limits.
Can I do anything else or should I request new ones?
Thanks again!
Mark[/quote]
Bought new ones, now the drivers work, but now the x-axis (end stop) collides with the z-axis bed mount… frustrating…
I just took a good look, then i saw that the thumb screws where in the lowest position.
So I then realized that i could lower the bed a bit by unscrewing the bolt for the Z-axis posistioning (on the back),
to provide more space between the x-asix endstop plastic and the z-axis bed mount.
Then I corrected the hight of the bed (0,35mm from the nozzle) with the thumb screws below the bed.
frustrating…