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I would test the Power Supply by disconnecting the Supply leads from the 3D Printer an measure the voltage.

Reconnect and measure the voltage at the Power Supply and the controller if there is a...

Your posted image suggests under extrusion, Stepper slippage clogged nozzle ect...

Post your slicers model settings

Using my slicer I can select a Seam Position of Random then the Start Seam becomes invisible into this random starting position.

Maybe I misunderstood,
Can you home or Level the 3D Printer without hitting the bed or Doe it hit the bed only when 3D Print starts.

Please read this web site

This could be a sign of moisture absorbed into the filament try a different roll of filament.

Hello: Colorado

Have you tried to reset your 3D Printer settings to Factory Defaults.

Your LCD has a setting to reset to factory settings or you can sent the following.
M502 // Reset to...

Using Hair Spray can help, Or printing closer to the print bed by 0.1mm can also help with adhesion.

Sometime I print on vinyl transfer Paper Tape to help with curvier models.

Cura has the ability to change at Z

I have never had any problems with multiple piece models just print them one at a time they fit together.

Sometimes they need a little sanding though they fit together.
I 3D Printed the MPCNC and...

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TRONXY® X5SA-2E Dual Colors 3D Printer Kit CoreXY with Dual Titan Extruder Dual Z axis 330*330*400mm

Cura I use two and older 15.04.6 an the newest version. Mostly now am using...

I have two of these One, two They have suited me well for four years time.
Today they look like the image below.


15912

Before Purchasing the 3D Printer I found the videos below and watched,...

This could note under extrusion, though your raft is looking good.
Is the print speed or temperature changing during print.

I started with PLA printing a 192C now printing PLA at 208C

I have posted everything believed would help someone with the same 3D Printers I have.
An after a while started helping others with there problems if believing my knowledge could help with there...

I have printed so many models almost perfectly. I rarely listen when someone who tells me that my 3D Printer is no good.

If I have to purchase the printer they suggested, Would never have a 3D...

Post the filament are you using and at what temperature are you trying to 3D Print.

Stated in post load a Project file though you have to import a STL files and other formats.

When printing using higher layer heights this happens on occasions.

I use Prusaslicer 2.3.0 then when I get close to these areas I change to a lower layer height avoiding these effects.
On...

It appears that you may have bed adhesion problems.
Clean the bed with a 91% isopropyl alcohol, then try Aqua Net hair spray on the bed surface to help with adhesion.

If you want smoother surfaces look for a setting called ironing in your slicer.

Set for top an bottom surfaces or all flat surfaces.

3D Printers start at varying prices from low to very high.
Some 3D Printers claim to be able to 3D Print though are not rigid enough to to maintain a a perfectly shaped 3D Printed model.

Not...

Loading no -:- Importing Yes

Prusaslicer works from a project file mainly 3mf & amf files.
You can import the Files make any changes you require for this model to print perfectly save as a 3mf...

I assumed you would post like you did if you had any questions.



Files I attached allow you to use a different slicer to slice the models for your Davinci Jnr 1.0. 1st unzip the files to a...

Here are some files to allow you to use Slic3r or Prusaslicer.

Well we are here just did not see a question.

Do you need help or only posing to show us what you are doing.