Repeatedly skipping same layer while printing
Today I made my first prints with the anti backlash nut and it was a great succes. no gap and a smood surface. Every layer seems to have an equal thickness now.
Looks great. Where did you get the anti-backlash nut?
Oh you drilled it. I thought that you did the mod like @Dim3nsioneer
Dim3nsioneer 558
Almost. I of course solved the problem of different hole positions with a 3D printed part...
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The result is almost the same. The difference is with brass you need grease and with delrin plastic oil , less friction.
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Labern 775
There have been a few reports lately with lumpy bearings and or sloppy z axis nuts.
I would first check your model in layer view just to make sure its all good.
Then raise and lower the bed up and down by hand to see if you can fee a tight spot. its normally repeated at a set distance as the balls complete one round of the inner race inside the bearing.
Next you can raise and lower the bed small amounts without the z axis turning to check the play in the z nut.
You may needs to remove the linear bearing individually from the bed and raise them on there own to feel any problems.
If you want to print something in the mean time just put a weight on the back of the bed and see if that helps.
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Jomet 4
I have the same problem. With a micro meter I measured the move of the bed and saw that it was not linear. The combination of not so solid bearings and a nut without anti backlash gives these gab. My nut has a backlash of 0.15 mm.
The bed remains for a momend at the same position so you put 2 layers on the same position. This gives you also an edge at the outside of your print.
I ordered a nut with anti backlash and waiting for it. When I have build up the system I will post the result here.
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