Why different wall thickness on X/Y and Y/X

Vertex 3D Printer Vertex - Issues while printing
1

Hi all,
I was trying to calibrate my printer because I will change my hotends.
And I need a correct printing for the mounting parts.

If I print a cube with 2x2x2x1mm (x, y, z, thickness of walls)
I get a strange measurement
The wall thickness of front-X and right-Y are the same, while back-X and left-Y are the same.

I would understand, if the both Y-walls and both X-walls are the same, but this strange thickness, does not make sense to me.
Any info appreciated.
Thanks
Frank

2

Since this is a rather vague description of your problem, let me make some philosopic statements.

The x and y steps are made by stepper motors with an resolution of 1.8° per step. Within the given hardware you can achieve a resolution of 0.19mm on this configuration. This resolution is refined by the stepper motor drivers by a factor of 16 by introducing micro steps. this is one by modulation of the motor current to the theoretical fractions which have to be applied for an intermediate position. So, how good is your practical part to follow these theoretical values?

Since you are printing 1mm large walls, I assume, that you not(!) do it in one trace. So check your slicer settings how the walls are generated.

For such thin walls it may happen, that the amount of extruded material is changing within the print. This will be an origin for deviations too, since it takes a long time until the change is effective at the nozzle (if you don’t use pressure advance mechanisms).

Just some ideas in which way to think.

3

Hi hoh61,

thanks for you reply.
I have calibrated my X, Y, Z and E1,E2 to a very close value, so the required movements in all directions are close to 0,02mm, which is close enough.

So I guess, the second suggestion of your reply ist the way I have to thing over the issue.
I will check the movements while printing, and see, if we have something wrong here.
Actually, I changed from stock nozzles to E3D this weekend, so I have to recalibrate a few things (0,4mm nozzles etc)
So if I am lucky, the problem could solve it itself :slight_smile:

Will report back

Thanks
Frank