Large Shifts in X-axis

alan40502
Posts: 6
Joined: Mon Feb 04, 2019 8:13 pm

Large Shifts in X-axis

Postby alan40502 » Mon Feb 04, 2019 8:26 pm

We have been struggling to diagnose a problem with our N2 Plus for about 2 weeks.
- the problem started when we came in one day to a failed print due to overtemp on hot end. The print had obviously drug quite a bit prior to shutting down (corner peeled up)...to the point where the hot end was severely bent and not usable.

- we ordered a new hot end, and wend ahead and did the Bondtech upgrade since we were ordering anyway.

- next print, the raft was looking great, but all of a sudden shifted approx 2.0 inches left. We stop, try several more prints--always an X shift, inches not mm.

- so we order new stepper drivers for the X and Y. Install them, ensure voltage is 0.5V.

- prints fine for 15 min, and then we get a 0.5inch shift, again in the X axis (see image).

- the only idea we have left is the stepper motor in the X axis needs replacing. but can't find a single instance of that on the forums.

Any advice or other ideas would be greatly appreciated.
Attachments
ARm.JPG

User avatar
Vicky@Raise3D
Posts: 5061
Joined: Fri Mar 25, 2016 3:54 am

Re: Large Shifts in X-axis

Postby Vicky@Raise3D » Mon Feb 04, 2019 11:09 pm

Does XY home work? If it works, please home XY then use screen to move the print head to (100,100). Once it arrives, don't touch anything on screen just keep the motors enabled, and try push the print head manually gently and see whether you are able to move it or not.

alan40502
Posts: 6
Joined: Mon Feb 04, 2019 8:13 pm

Re: Large Shifts in X-axis

Postby alan40502 » Tue Feb 05, 2019 3:14 pm

Thanks Vicky,

XY Home does work. We did this, and we are not able to move the gantry. Any ideas?

Alan

alan40502
Posts: 6
Joined: Mon Feb 04, 2019 8:13 pm

Re: Large Shifts in X-axis

Postby alan40502 » Tue Feb 05, 2019 3:24 pm

....oh, it also moves smoothly through the whole range of motion when DO disengage the steppers. Belt tension feels good, and it's definitely not skipping belt "teeth".

User avatar
Vicky@Raise3D
Posts: 5061
Joined: Fri Mar 25, 2016 3:54 am

Re: Large Shifts in X-axis

Postby Vicky@Raise3D » Tue Feb 05, 2019 8:24 pm

If you can't move print head with motor enabled, that means the couplers and motors are working properly to lock the print head.
And if you can move the print head smoothly with motor disabled, that means you doesn't have gantry binding issue. So your issue doesn't sound like a mechanical issue if you can double confirm your printer meets the two mentioned above.
Does the issue always focus on X direction only?

alan40502
Posts: 6
Joined: Mon Feb 04, 2019 8:13 pm

Re: Large Shifts in X-axis

Postby alan40502 » Tue Feb 05, 2019 9:31 pm

It appears to always be the X. Here's one I'm doing right now. The shifting always seems to occur between layers.
first layer.JPG
first layer...doing great

2nd layer.JPG
second layer...getting worse
haywire.JPG
completely haywire
haywire_1.JPG
...even crazier

User avatar
Vicky@Raise3D
Posts: 5061
Joined: Fri Mar 25, 2016 3:54 am

Re: Large Shifts in X-axis

Postby Vicky@Raise3D » Tue Feb 05, 2019 10:37 pm

Would you like to check whether the cooling fan on motion controller board works properly or not? It is located in the black plastic box at the right bottom corner inside the side door with a lightning logo. It should be on all the time when you power on the printer.
And would you like to double confirm whether there is any pulleys loose which are used to hold the belts?

Please print 5 cubes for print test, four at each corner and one in the middle of the build plate and share me the pictures of the result?

alan40502
Posts: 6
Joined: Mon Feb 04, 2019 8:13 pm

Re: Large Shifts in X-axis

Postby alan40502 » Wed Feb 06, 2019 3:48 pm

It was 2 loose set screws on the X-axis coupler. Found them on our second check.

User avatar
Vicky@Raise3D
Posts: 5061
Joined: Fri Mar 25, 2016 3:54 am

Re: Large Shifts in X-axis

Postby Vicky@Raise3D » Wed Feb 06, 2019 6:43 pm

Make sure that when you tighten the screws on coupler the screw is locked on the flat surface on motor rod for better fix.
https://support.raise3d.com/article.htm ... d=TmpjMg==
You can check out the picture of Step 11 and 12.

alan40502
Posts: 6
Joined: Mon Feb 04, 2019 8:13 pm

Re: Large Shifts in X-axis

Postby alan40502 » Wed Feb 06, 2019 11:37 pm

thanks


Return to “N Series”

Who is online

Users browsing this forum: No registered users and 1 guest