Problem with finishing

[sabbot 0]

Hi, I'm using ender 3 pro. The filament I'm using is pla+, the printer was doing fine but suddenly there is something wrong. It is printing the top part in the wrong place. Besides, there is so many thread like substances. I have tried leveling the bed several times. But I'm unable to find the problem. My nozzle temp us 210C and bed temperature is 70C. Is my printer missing several steps? Please help me. I have attached the picture of my print. 

[geert_2 558]

I don't know your printer, so I have to do a bit of general guessing.

 

I think it could be the printer missing steps, but it could also be the object becoming a bit loose and wiggling? Or a defect in the model or slicer-bug?

 

First, in Cura (or other slicer) always check the model in Layer-View, to see if this defect is there or not.

 

Check if the printer head moves smooth in X- and Y-direction. Movement could be blocked by debris, or lack of lubrication.

 

Then, while printing, keep watching closely what happens. You should be able to see the difference between wiggling and skipping.

 

While printing, you could also push the head, to see how hard it is to get it to miss steps. If it is very hard to do, this is unlikely to be the problem. If it misses steps at the first touch of your finger, it could very well be the problem.

 

Although I don't know your filament, for such small objects, 210°C looks a bit hot for PLA-materials. I would normally do 195...200°C for such models, which should give less stringing. But that could depend on printer and material. Try on the fly to change temp in steps of 5°C, and see what happens.

 

[sabbot 0]

4 hours ago, geert_2 said:

I don't know your printer, so I have to do a bit of general guessing.

 

I think it could be the printer missing steps, but it could also be the object becoming a bit loose and wiggling? Or a defect in the model or slicer-bug?

 

First, in Cura (or other slicer) always check the model in Layer-View, to see if this defect is there or not.

 

Check if the printer head moves smooth in X- and Y-direction. Movement could be blocked by debris, or lack of lubrication.

 

Then, while printing, keep watching closely what happens. You should be able to see the difference between wiggling and skipping.

 

While printing, you could also push the head, to see how hard it is to get it to miss steps. If it is very hard to do, this is unlikely to be the problem. If it misses steps at the first touch of your finger, it could very well be the problem.

 

Although I don't know your filament, for such small objects, 210°C looks a bit hot for PLA-materials. I would normally do 195...200°C for such models, which should give less stringing. But that could depend on printer and material. Try on the fly to change temp in steps of 5°C, and see what happens.

 

Is there anything to lubricate rather than the z axis rod? 

[geert_2 558]

1 hour ago, sabbot said:

Is there anything to lubricate rather than the z axis rod? 

 

I don't know for your printer. You have to search for that in its manual, or a forum for that specific printer.

 

For my Ultimaker 2 printers, there are the X- and Y rods (=with the drive belts and sliders), and the rods where the head hangs on. These require thin oil. Plus the Z-axis worm, but this requires grease. All have to be cleaned first, and then lubricated.

 

But for other brands and models it may be completely different. And some may have sort of internal movements, slots, or sliding mechanisms (I don't know the correct English terminology), where pieces of dirt can get stuck in, that have to be removed first. And some printers may have self-lubricating bearings where oil is forbidden.

 

With power off, I think you should be able to move most axis pretty easily if they are connected to a stepper motor via gears or belts. But never force them if you don't know the exact mechanism, so you don't damage anything. Also here: check the manual for your specific model.

 

Or search on the internet, or Youtube, or so, how to do maintenance: "how to lubricate [your printer]". You might have luck.