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SBandeira96
(@sbandeira96)
New Member
Unleveled motors

I'm a very new  3D printer user so if I'm missing any information please let me now.

Recently my company bought a Prusa i3 MK3S, in order to try some new stuff for our machines.

In the process of printing new parts, we realized that our left motor was 0,2mm higher than our right one. I've try to do the xyz calibration but it seems to not be enough. I hope that someone here could help me.

Thanks in advanced.

Posted : 06/06/2019 8:12 am
Vojtěch
(@vojtech-3)
Honorable Member
RE: Unleveled motors

If you mean that the left and right ends of the X assembly are not level, then the answer lies in adjusting the position of the top end plastic parts on each of the Z smooth rods. These are used to align the X assembly (and thus the position of the Z motors).

Posted : 06/06/2019 10:39 am
SBandeira96
(@sbandeira96)
New Member
Topic starter answered:
RE: Unleveled motors

Thanks for the reply ! That's what I meant ! 

How could I do that ? And if i do that am I not changing the calibration of the worm screws as well ?

Posted : 06/06/2019 10:53 am
Vojtěch
(@vojtech-3)
Honorable Member
RE: Unleveled motors

The threaded rods (worm screws) are attached to the motors, unless you move those, they will stay where they are. They are not in contact with the top Z-ends. Still, it makes sense to re-run all the self-test and calibration steps after any change to the printer mechanics.

Posted : 06/06/2019 1:01 pm
Bunny Science
(@bunny-science)
Noble Member
RE: Unleveled motors

I have a fairly extensive thread covering how I attain accurate build geometry

 

https://forum.prusaprinters.org/forum/original-prusa-i3-mk3s-mk3-assembly-and-first-prints-troubleshooting/planar-parallel-and-square/

Posted : 06/06/2019 1:16 pm
SBandeira96
(@sbandeira96)
New Member
Topic starter answered:
RE: Unleveled motors

I'll try to follow your advices and comeback we some news.

Really appreciate all the help

 

Posted : 06/06/2019 2:45 pm
Chocki
(@chocki)
Prominent Member
RE: Unleveled motors

I printed and fitted these: https://www.thingiverse.com/thing:2779123

They just made the Z axis parts more square and level whilst following guy-k2 advice in the link above, helped sort out my sloping bed levelling which I had been blaming on the bed, but turned out to be the top mounts causing the Z axis to be higher on one side than the other.

The prints in the link allowed enough adjustment to get everything nice and level and allow for better maintenance (read upgrade X axis) in the future.

Normal people believe that if it ain’t broke, don’t fix it. Engineers believe that if it ain’t broke, it doesn’t have enough features yet....
Posted : 06/06/2019 3:32 pm
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(@)
Illustrious Member
RE: Unleveled motors

Um - simplest answer is to turn ONE of the lead screws to level the X-Axis.  This also happens automatically upon calibration; but if the sides are far apart, the cal bump may not be enough, and additional manual adjust is needed.  

My question is whether or not the cal procedure was followed, and how far off level was the X-axis when performing the initial manual preflight and level test?  This section is labeled PINDA check, but it also tells the user to level X-Axis manual to avoid scratching the bed.

Posted : 06/06/2019 5:53 pm
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(@)
Illustrious Member
RE: Unleveled motors

I made these for my top bump stops - more substantial and avoids the issue of what exactly is the X axis stopping against: screws or plastic?

https://www.thingiverse.com/thing:3327290

This post was modified 2 years ago by --
Posted : 06/06/2019 9:10 pm
Bunny Science
(@bunny-science)
Noble Member
RE: Unleveled motors

The screw heads are the point of impact of x-ends during upward motion on my machine. The bolt heads are fixed in location and won't shift, unlike against top plastic caps.

Posted : 06/06/2019 9:14 pm
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 --
(@)
Illustrious Member
RE: Unleveled motors

Yep - and on my printer the X supports were "mostly" hitting the screws, but once in a while they'd squeak by and the axis was not as level as it should be. So I modified the Prusa parts to have a beefy central block held rigid with lower profile screws. It works rather well.  No flex, and no occasional missfire.

 

Posted : 10/06/2019 4:51 am
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