Last 3 prints (not exactly same model), after printing fine for hours, the head suddenly “loses it’s position” and shifts right by several centimeters,printing plastic in mid air and ruining the print. In this picture, you can see that the print up until it goes crazy looks pretty clean. The image on the screen shows what the print is supposed to look like and it was almost done. But suddenly the print head just decided to start printing several centimeters to the right for no apparent reason. I had this happen 3 times in a row. The Y and Z axes seem correct: it’s just the X that shifts right.
Any ideas?
You have one thread saying that the print head was stuck in the print & this one where it moved to the wipe nozzle position…which happened first & explain each as much as possible please.
Help,
My print head is stuck inside of a failed print. Using the controls on the touchpad doesn’t work. It says that I need to “home the head” first. How do I manually lift it up?
Hello,
You can loosen the nut at the top of the threaded rod, then turn the rods to bring them up.
Don’t forget to level and tighten the nuts afterwards.
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You should be able to use a G92 command in the terminal
G92 X0 Y0 Z0
This should make the Z axis “trusted” and enable motion. Follow with
G1 Z100
G28 X Y
Will raise the gantry 100 mm and home X and Y. Z will remain trusted but will be off by the distance the nozzle was from the bed when you issued the G92.
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Thank you. With the power off, I just rotated both shaft couplers above the Z motors by hand and was able to raise the gantry. Thanks for all your replies!
Hello Lion,
The repeated X-axis shift has occurred 3 times and is the main point of my first post about the X-axis. In all three cases, the printer prints 4 or 5 cm (vertically) and then suddenly shifts the X axis where the print head moves several centimeters to the right (towards the control screen). The printer is unaware that a problem has occurred and continues to extrude plastic in mid air. This problem occurred with 3 different models and the time that it occurrs is several hours into the print job.
By the way, I emailed Sovol support, and they suggested that I need to adjust the X-axis belt. Maybe I should lube/clean the bearing as well. Is there a good video or tutorial for how to perform this maintenance?
The Z-axis question was a simple question about how to manually raise the gantry safely. That is unrelated to the X-axis problem. While trying to use the control pad to raise the Z, it says “You Must Home First”. I accidentally pressed that because I wasn’t sure what would happen, and it moved the gantry DOWN instead of up. So, I quckly turned off the power, so that’s what you see in the photo. I separated the Z-axis post so that other people could find it in the future. As I stated separately, I just manually rotated both shaft couplers on both Z motors to raise the gantry manually.
This is almost always always a result of the nozzle hitting the lower layer and causing the motor to “loose counts”. The root cause it the model warping and one corner lifting off the print surface. Objects with square corners are especially prone to lifting a corner.
Things to try:
Add a full brim
print off a raft
Different filament
Use glue on build plate
Enable Z hop
Enable “avoid crossing walls”
Change infill to gyroid or cubic
Raise bed temperature
Build an enclosure (some people just a trash bag or big cardboard box)
Google “Nozzle hits print on moves”
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Thanks! I’ll give it a try.
Yes, I also increased it and adjusted the Z-axis height in the same way.