Print shifting

[Nicholas_Fazio]

I have a Da Vinchi 1.0A running repietier. I have been having problems with layer shifting multiple times mid print. Some times it sounds like the get gets stuck or something is jumping then keeps printing off of where it should be it is jumping on the X axis(left to right) the belt seems tight. The rails are lubed up and the head move smoothly. I have the filament mounted above the printer being pulled in through a hole in the top so there is less strain front to back. Any ideas?

[Nicholas_Fazio]

my slicer is Simplify 3D max speed is set at 1800mm/min I believe. Or what ever the default is for the da Vinchi profile

[MB3D]

Hi Nicholas,

this is either because of a “too weak” stepper motor. In this case the controller tells the stepper to accelerate at a value, which the stepper can’t handle, because it get’s too less power from the controller to do the required moves. Then the stepper stands still, while the controller thinks, that the move has taken place. You can change this by using different maximum speeds and you can also edit your firmware to put in different acceleration values.

Another reason can be, that the gcode has some errors. You can fix this by re-generating the gcode and try the new version. If this issue happens in multiple gcodes the first reason is more likely.

If the DaVinchi uses the Marlin firmware, you can use this guide to fix the issue:

Cheers,

Marius Breuer

[Pot8oSH3D]

Hey there @ReprapAustria. A couple of thoughts:

Maybe one part is curling up slightly and being hit by the nozzle as it traverses from one place to another. This can happen on prints where there are several items being printed at once and where you’re trying to print unsupported. Of course, it only needs to happen once and your whole print is ruined.

If you have a dual-extruder printer and you’re printing with only one nozzle, maybe the unused nozzle is slightly lower than the used one. Once again, this could foul on the print and cause the stepper to stall.

Believe me, I know how frustrating this can be as I’ve had more than my fair share of this problem recently. As always, the better set-up your printer is, the fewer problems happen.

Good luck! Hope you find out the cause of the problem quickly.

Cheers,

AndyL

Pot8oSH3D

[kingersoll]

I believe that is the default setting in Simplify for the Da Vinci. I have been using the default settings with no issues and even turn the speeds up part way through most prints with no issues. I don’t think it is a power problem or a speed problem. I’d guess there is something getting in the way, are all your cables out of the way? Does this only happen on a specific print or no matter what you print? Have you tried recalibrating your bed? Also what firmware are you running?

[EvanNguyen]

This is common with the Da Vinci. Check the wiring going to the X motor. That wiring bundle goes through a lot of stress with the sharp bend so some of the wires tend to go bad and break the connection momentarily. This causes the motor to skip steps.

[bonoergaard]

Check the wiring on the x axis maybe there is a loose connection

[TheNewGuy]

One other thing to check, that I have not seen mentioned is the bearing housings on the printer are known to crack, and known to cause play. Even if the belt is tight, there is a chance you are getting some type of backlash. Several prints on thingiverse including X axis belt tensioner with bearings for the Da Vinci 3D printer by oscahie - Thingiverse may help even if your belt is tight, perhaps the gear is slipping causing backlash. Not sure but thought it was something I had not seen mentioned above.

[radioouman]

I have exactly the same problem. The printer pauses when these shifts occur.

It can also be caused by a loose table and there are YouTube videos explaining a simple fix with a blade.

[scifired]

My problem was kind of the same and it turned out to be the cracked bearing housing problem. It was driving me crazy so I took the X axis and sure enough the black plastic bearing housing was cracked. Carefully I printed one off and it is working again.

[Nicholas_Fazio]

It shifts by as much as 1/2 inch some times

[Rada3Dnl]

First check the hardware (belt, gear, bearing, cables) and firmware like mentioned below. It can also be a problem with the slicer in Repetier. I had the same problem a wile ago. Try it with a new g-code and try not to stress your computer to much wile slicing.

[Nick_Winter]

I had to buy a new printer because nothing I did fixed this… It sounds like you are having the same issue.

If you want to hear from a whole bunch of people with same issue you can start here: http://voltivo.com/forum/davinci-peersupport/830-1-0a-and-repetier-host-92-layer-shifting-support-group

I’m the OP but I haven’t been there in forever. Good luck sir, nothing I did worked

[rXc3NtR1c]

I print with the right side off so that the wires don’t catch on the plastic, yet to make any kind of cable management. The biggest issue I had that caused mine to jump was that the filament had little “nodules” in it that caused it to jam up while trying to fit through various small holes - it was catching on the edges.

[cybercricket323]

Grab the ext-ruder and forceful move the x and y axes around and lose the belt that way , dont be scared use excess force and loosen free those axes, I used to have same problem when i calibrated my Da vinci 1.A , it would only touch one corner instead of 3 , so my belt were 2 tight.

[Nicholas_Fazio]

Has anyone tried swapping out the main board for a Ramps 1.4?

[steven_10]

I have had this on my reprap and It drove me crazy…in the end it turned out to be the stepper drivers over heating, put a fan over them and like waving a wand over it all good… maybe try opening up the electronics case getting a desk fan a blow some air over the electronics?

[kingersoll]

Have you tried changing the below firmware setting? Seems to be fixing the issue for some users.

#define ALWAYS_CHECK_ENDSTOPS 0

[Arnoldas]

Guys, the community of Da Vinci’s 1.0 very often ask for some helpful tips on printing Marvins: I have collected a few over Here , but it’d be really cool if we could get some more input

[audio9]

I have the da Vinci myself and I know of two issues that cause this, both of which I’ve experienced. First is the belt slipping, which doesn’t usually happen especially on new printers but make sure the rails stay lubricated, since they are prone to sticking if they’ve sat still too long or you’re printing a lot. The second is a bit more general, and happens because the stepper is receiving insufficient power. On the Da Vinci this usually happens on the x axis, and you can solve it completely just by slowing down the print a bit. Something about max power throughout on the Due (which the da Vinci runs on)