Print Fail due to Glitch

[BigE79]

Hello Tiertime,

Last night I started a print but when I checked it this morning the Y-axis had jumped about 11.2mm. The print was still going but I could not pause or stop the print with the touch screen. I had to turn it off at the back instead. The touch screen was allowing me to turn the light on. I also noticed the wifi icon showed no wifi connection even though my network was okay.

Given I could not pause or stop the print I suspect this is an error in the firmware not a jump on the motor belt or y-axis motor. Everything looks fine mechanically and the machine is still fairly new.

Is this a known issue? Is there a software update to fix this? My machine details are:
Screen: 1.3.14
Firmware: 359
S.N. : 550705
Total Time: 106.5h


I've attached some photos of the failed print. You can clearly see the Y-axis shift.

The attachmentIMAG1913.jpgis no longer available

Software Glitch Print

IMAG1913.jpg (559.15KiB)Viewed 4525 times

I don't want this to happen too regularly as it will cost allot of filament and time.

[BigE79]

Maybe a better photo:

PrintShift.jpg (251.51KiB)Viewed 4524 times

[TiertimeBrook]

Hi BigE,
From the image we think that possible is a hardware issue not a software issues,
If the extrude head moves not smoothly on the y axis rod maybe caused a sudden shift of it, So you can first test the moving of the extrude head , Cut off the power first, and move the extrude head by hand to see if it can move smoothly on the smooth rod, and by the way , check if the belt of y axis normal or not, or you can start print a smaller model to see if this issue will happen again or it just an accident.

And we also report this to the software department to check if there is a bug or not, and I will update you the news if we have result.

Regards
Brook

[BigE79]

Hi Brook,

I tried to run the print again and the internal supports seem to be failing. When this happens the supports get caught inside the model the stick up higher than the build surface. I'm 99% sure what happened is the head has hit the support and got stuck during print. I'm printing with stable support on so the internal support are quite strong.

这个问题似乎没有adherin支持g to the model very well at all. The supports stick to the base/raft very well but not the model. Looking in detail at the slicing preview there is always a two layer gap between the model the and start of the support. I made a test model to look at this in the slicer. Every time I re-slice and look at the model there's always 2 blank layers between the model and support. I tried every option to change this including:

Layer Thickness
Stable Support
Easy to Peel
Roof Density
Surface
Threshold Angle
Spacing
Infill
Making and load a custom material with peel setting changed
Extrusion Width (note: you have to change this in the material setting, the setting in advances print options does not work)
Mixtures of the above.

None of these made any change to the 2 layer gap. Even changing the layer height to 0.35mm did not change this. This means there would be a 1.05mm gap between the nozzle and model when trying to print the first support layer. I'm not sure this would even be possible with a 0.4mm nozzle.
Something seems broken here, there should be an option to adjust this. A one layer gap would probably work great and that's what other slicers seem to do.

Picture below shows the slicer layer 33 of a test piece. You can see 2 layers of printing above the surface of the main block at layer 31 but no supports yet.

The attachmentSlice1.PNGis no longer available

Next picture shows layer 34 where that support starts printing on the3rd layerabove the surface.

The attachmentSlice2.PNGis no longer available

This is with stable support on and easy peel off but as I said there's nothing I can do to change this slicing behavior.

I'm trying this print again in ABS+ as I thought the additional strength might help but again the internal supports have been pushed over. See pic:

Slicer Layer 33

Slice1.PNG (60.85KiB)Viewed 4465 times

There are pieces of broken support laying on the bed also. This time it hasn't effected the machine so I'll see how the print finished.

My internal supports keep getting pushed over on all prints. How can I fix this?
There does not seem to be any Z-hopping happening during print except for the first layer of the raft where there's 2-3mm of z-hop being used.
Is there a way to turn Z-hopping on?

[BigE79]

Also when adding multiple inline attachments to this forum they seem to be muddled up and not upload properly. Hence pics above are not in the correct order.