*(SOLVED)Print shift about 1-2 cm in Y directions ?!?

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naser404
Posts: 22
Joined: Sat Jan 19, 2013 4:17 pm

*(SOLVED)Print shift about 1-2 cm in Y directions ?!?

Post by naser404 »

Hi,
As the topic says, after a couple of layers print fine than suddenly the print shifts in Y direction by 1-2cm, I had this problem some time back but I cant remember what I did to solve it, and it does happen every once in a while for some weird reason.

I checked my sensor wires & everything seems fine.

any suggestions ?

Naser
Last edited by naser404 on Wed May 08, 2013 2:32 pm, edited 1 time in total.

naser404
Posts: 22
Joined: Sat Jan 19, 2013 4:17 pm

Post by naser404 »

Here is a log file, even though it says echo:endstops hit: X:0.04 on the 3rd line it was still printing fine until it reached between line 13-16 than it shifted in the
Y direction not once but twice.

23:05:14.755 : Printing layer 1 of 105
23:05:14.802 : Printing layer 2 of 105
23:05:23.976 : echo:endstops hit: X:0.04
23:06:58.186 : Printing layer 3 of 105
23:07:15.860 : Printing layer 4 of 105
23:07:31.215 : Printing layer 5 of 105
23:07:48.237 : Printing layer 6 of 105
23:08:05.673 : Printing layer 7 of 105
23:08:23.798 : Printing layer 8 of 105
23:08:43.012 : Printing layer 9 of 105
23:09:02.803 : Printing layer 10 of 105
23:09:20.837 : Printing layer 11 of 105
23:09:39.076 : Printing layer 12 of 105
23:09:57.810 : Printing layer 13 of 105
23:10:17.045 : Printing layer 14 of 105
23:10:37.561 : Printing layer 15 of 105
23:10:58.892 : Printing layer 16 of 105
23:11:23.283 : Printing layer 17 of 105
23:11:47.080 : Printing layer 18 of 105
23:12:12.073 : Printing layer 19 of 105
23:12:37.390 : Printing layer 20 of 105
23:13:04.378 : Printing layer 21 of 105

oregano
Posts: 6
Joined: Fri Oct 19, 2012 3:00 am

Post by oregano »

I had similar problems at one stage - due to the stepper motor driver adjustment.

In my case, it was (from memory) overheating - too much current.

naser404
Posts: 22
Joined: Sat Jan 19, 2013 4:17 pm

Post by naser404 »

oregano wrote:I had similar problems at one stage - due to the stepper motor driver adjustment.

In my case, it was (from memory) overheating - too much current.

oregano, did turning it down "counter clockwise" help solve the issue for you ?

oregano
Posts: 6
Joined: Fri Oct 19, 2012 3:00 am

Post by oregano »

I'm not near my printer at the moment - so I'm going from memory. Yes counterclockwise reduces current, clockwise increases current - you should check this (I think these forums have some info) before looking at the steps below.

Basically, a process for setting up the trimpots without test equipment is: for each stepper motor controller, turn the pot counterclockwise until the stepper motor will not turn any more (if you use repetierHost - use the manual tab to exercise the stepper motors) - then turn the pot (carefully) clockwise until it starts turning again. Try to use something non-conductive to do this to insure against accidently shorting anything.

This will set the minimum current required to engage the stepper motors (which will ensure the chips are run with the lowest heat). It may be that a slight amount of tweaking (turning clockwise) beyond this is required - you should run a few test prints to verify this.

You didn't mention whether you have a 1.0, 1.5 or 2.0. I'm in Australia (hot), and (until recently) had a 1.0 - I needed to run an additional fan over the stepper motors in order to keep them cool enough. The 1.5/2.0 box is much better.

Hope this helps....

naser404
Posts: 22
Joined: Sat Jan 19, 2013 4:17 pm

Post by naser404 »

Thank you oregano,

I am in Dubai (very hot), i have the 1.5 Felix & i used to have the same problem but i cant remember what was the cause, i shall replace the tiny 40mm Box fan with a 120mm computer fan running @5v and see if that works.

I did tension the belts a little so might also loosen them if i am going to reduce the current.


Thanx again bro.

naser404
Posts: 22
Joined: Sat Jan 19, 2013 4:17 pm

Post by naser404 »

Okay I edited the first post incase someone has the same problem & major thanx to my dear friend oregano for his support to fix the problem.

It turns out that my motor drivers were getting too hot, so I lowered them & added a 120mm PC fan & wired it directly to the +12 on the board.

I had another issue where the stepper motor for the extruder was making noise when extruding & it also turns out that I needed to turn the power for it down.

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