"Small" printing problem
I've had the printer for a few weeks now. After my vacation I wanted to approach the problem:
Sometimes the printer has small dropouts. The feed in X axis is briefly interrupted (approx. 1-2mm) the feed in Y continues to run.
Compensating he then makes some other lines, where he "catchs up " the before missing. This can be seen from the fact that these then look out over the left surface.
Interestingly, this happens almost exclusively when he prints from right to left. The right surface is fine except for a few dropouts.
It's not the timing belt.
Sometimes it does that more or less.
I have also tried all possible constellations (quality, speed, position on the bed) whether it is repeatable. Unfortunately no.
Another picture shows that he also produces top results. But at some point there will be one or the other drop-out.
I filmed the "mistake" also on video.
Here examples from first layers
upside are outliers (left pressure side), downside are clean surface (right pressure side)
The examples were placed on the printing bed as follows
So he can also (perfect print)
RE: "Small" printing problem
Your first layer is too high (not squished enough). You need to adjust Z-offset to a lower - more negative number. Search for the thread "Life Z Adjust" Live Z Adjust
Layer one should look something like this:
RE: "Small" printing problem
Thank you for pointing that out. I'll try to correct that.
However, this is not the solution to the problem. I made two printouts yesterday. One is a battery holder (left) and one is the vase from the SD card.
On the left is a catastrophe, the print I then also aborted. But on the right it worked up to half, then he had 5mm the drop out, to continue working correctly again.
RE: "Small" printing problem
are your belts tight?
I have a Prusa,therefore I research.
RE: "Small" printing problem
yes
RE: "Small" printing problem
just printed. Perfect.
The printer has printed these last three objects. It has not been turned off, or any change has been made!
RE: "Small" printing problem
that looks like it's lower then your shifted layers isn't it?
I have a Prusa,therefore I research.
RE: "Small" printing problem
With the vase, yes. But I have that partly already in the first levels.
It is (almost) impossible for me to achieve the same results. Bad as well as good.
RE: "Small" printing problem
Actually, I'd not call that last print perfect. There are still pretty large shifts that the printer shouldn't be doing. And the symptoms of intermittent shifts then no shifts fits the loose gear problem.
Re-torque your X and Y axis belt drive gears. Then you should also check the E axis, it has only one screw, but flat procedure is the same.
Flat First: Drive gears must be tightened flat-first. Start with both set screws fully loosened so the pulley is free to spin on the motor shaft. Locate a set screw and align it with the flat on the motor shaft. Slowly tighten the set screw until it fully contacts the flat surface. The screw should be dead center on the flat. Now tightened the flat set screw to spec. Once you have tightened the flat set screw, not tighten the jam set screw. Once tightened, never touch the flat set screw unless the jam screw is first loosened.
Here are a few images of the proper alignment of set screw to the shaft flat.
RE: "Small" printing problem
OK. This is my job for the weekend 🙂
RE: "Small" printing problem
Great!
I just corrected the screws on the X motor shaft.
