MK4 always calibrates X axis before printing
 
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MK4 always calibrates X axis before printing  

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dmbgo
(@dmbgo)
Trusted Member
MK4 always calibrates X axis before printing

HI,

My MK4 always calibrates its X axis before printing, is this normal, or is there something I need to do?

Thanks

Dave

Posted : 24/02/2024 3:51 am
JP Guitars
(@jp-guitars)
Estimable Member
RE: MK4 always calibrates X axis before printing

It's normal

Posted : 24/02/2024 9:46 am
dmbgo
(@dmbgo)
Trusted Member
Topic starter answered:
RE: MK4 always calibrates X axis before printing

Thanks JP Guitars, I thought it probably was, but thought I'd ask anyways.

Posted : 24/02/2024 10:55 am
pink_clown
(@pink_clown)
Estimable Member
RE:

It is not a calibration - the printer is looking for home position of x and Y axes. You cand see it at the beginning of the .gcode file.

G28 ; home all without mesh bed level

Not having the real time axes position sensors, the printer can calculate the current printhead position only from a start position (home) adding each step (with very exact length) to the start position in each direction. At the print start the printer is not able to identify, whether you did not move the head manually before different prints.

That is the reason for homing.  To set the Z start position is executed via Mesh bed leveling.

M107; MBL

If the gcode does not have those two commands the print will start from the actual position which can be anywhere.

 

This post was modified 2 months ago by pink_clown
Posted : 26/02/2024 2:04 pm
dmbgo
(@dmbgo)
Trusted Member
Topic starter answered:
RE: MK4 always calibrates X axis before printing

Thanks for the detailed explanation pink clown. I realize the need for the printer to establish a home position b4 printing, I was wondering why it says "calibrating x axis"on the screen. I'm happy for it to do it every time I print, I just wanted to check that this didn't point to an issue.

Posted : 26/02/2024 7:56 pm
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