https://www.dropbox.com/s/s52075nrtoj97db/2014-07-31%2018.33.39.jpg
My prints suddenly shift 5 mm in the x axis, What does this mean?
For the last two weeks the printer has been working well, and has only started skipping in the past few days.
The voltages of all the stepper motors are 0.55 V.
The belt tensions are pretty constant ( very little misalignment)
I’ve noticed that the x axis pulley is eccentric.
It could be x-axis end stop switch.
Sometimes vibration makes them activate in mid print and that can cause layers to jump.
If you update to the Marlin V2 firmware, it does not test for switch activation once the print starts so that wont happen.
To check if it is the switch just place a small bit of foam between the switch body and the lever, so that the lever is held away from the switch after it homes at the beginning of a print.
If it is not the switch activating its most likely a rough spot on the linear slide rods. Try cleaning them, and then using a very light oil on them.
Are you getting any end stop hits in the log area?
If so check the mico switch for that axis
Thanks guys I’ll pay more attention to the next print I do to see if any errors are raised. The switches provided with the kit are quite loose and flimsy so this could be the issue.
Check your bearing. I’ve discovered these bearings have a tendency to disintegrate. Mine did the same thing.
Recently a side step in x axis occurs, as described in some posts to forum.
For particular object, it always happens at the same z axis level (layer 26) and is of the same size, 1 mm, and to the same side,+ x axis direction.
If the same object is loaded and sliced reversed so that what was first layer becomes last layer, side step disappears.
Motor drivers are re-calibrated for 0.425 V each, but there was no improvement.
End switches are not activated during the printing.
If object is located on the heated bed to another position, the side step still occurs
at the same height , in the same amount and same direction.
My uneducated guess is that step somehow found its way into the g code.
How can I upgrade to different Merlin, as suggested?
Vladimir.
Hi!, my printer is new, I have it for only a month. I’ve got heat bed troubles so I put my prints as close as I can of the edges of the mirror. I’ve managed to print this z axis motor holder http://www.thingiverse.com/thing:144813 and I print the support holder of this fan duct/nozzle http://www.thingiverse.com/thing:160252 these prints went fine. But at about mid height (at about layer 300) of the fan nozzle print, the layers have stepped on the right on two or three millimeters. (See picts at the end of the message.)
The all four motors are already set to 5.5v, it runs on the firmware V2, and no, there’s nothing in log about end stop hit.
It does the same thing for a box that i’ve designed with 123D design, but at about layer 20.
Is there somebody that have located the origin of this kind of problem?
@Topbox what kind of oil do you advocates?
Maybe it’s due to motors drivers overheat because of the long print and precision that it need? I read somethings on that in other threads. I’ve ordered stepstick sinks and a 6cm*6cm fan to cool the board.
