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X axis not centered on the bed  

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Anachronist
(@anachronist)
Estimable Member
X axis not centered on the bed

I am printing an object 237mm wide with a 5mm brim, making the total print width 242mm, leaving me with 8mm of margin on the print bed.

PrusaSlicer (2.2) shows the model centered perfectly on the bed.

However, the printer is laying down the part so that the edge of the brim is 1mm away from the print area outline on the steel sheet, and the left side is 5mm away (the white outline on the steel sheet is about 1mm wide itself).

My steel sheet is centered on the heat bed, with the alignment pins firmly in the indentation on the back edge.

I am concerned that if I needed to print something using the full 250mm print width, I will have problems due to the print not being centered, in spite of the slicer showing it as centered.

Is there some sort of calibration I can do to fix this?

 

Posted : 13/05/2020 2:18 pm
Anachronist
(@anachronist)
Estimable Member
Topic starter answered:
RE: X axis not centered on the bed

Why can't I make a correction to my post after 5 minutes?

Anyway, I meant the total print width with brim is 247mm (237 for the part and 5mm for the brim on each side). The question remains, though, whether there is any calibration I can do to make my print centered on the bed.

Posted : 13/05/2020 2:28 pm
Neophyl
(@neophyl)
Famed Member
RE: X axis not centered on the bed

Forum software has a very short editing window.  Get used to it as theres nothing you can do about it.

When you calibrate your printer it determines where the home x/y/z is through its routine.  If might be off to where the centre of the bed is.  Mine doesnt seem to have that problem so the following is what I would try if it did.

In Prusa Slicer, make sure you are in expert mode and go to Printer Settings>General>Bed Shape.  If you click that button it allows you to define how big your bed in in X/Y but it also has Origin fields  that let you define how far from the front left corner it should consider 0/0 to be.  You could try adjusting those values and printing a small cube 10x10x0.4 placed at 0/0 on the bed and check its position. 

If that works out right you can then place similar cubes in the other corners and try printing again.

Posted : 13/05/2020 5:10 pm
Anachronist
(@anachronist)
Estimable Member
Topic starter answered:
RE: X axis not centered on the bed

@neophyl - thank you. I wasn't aware of that setting.

The problem is, I have to set x to a negative number, like -2mm. And then the slicer gives me a warning about the cube with a corner at (0,0) not being completely on the bed because it overhangs 2mm to the left.

My printer is still busy but when it's free I'll experiment with the calibration you suggest.

This post was modified 2 years ago by Anachronist
Posted : 14/05/2020 2:45 am
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