kb0nly
Posts: 11
Joined: Wed Jun 24, 2015 9:57 pm

Layer Shifting, Very Odd Issue...

Ok some background, i have three Makerbot Rep 1's that have been modded quite extensively over the years, no issues with any of them. I have been using Simplify 3D for about a year now, no issues.

Now this week i designed a part and sliced it with S3D and saved it to the SD card and started printing it with two printers, to double the amount i can make in a given time as i need a large quantity. The first batch was perfect, the second batch was messed up, the third was ok, then another messed up, then i did 4-5 batches with no issues, then again they messed up.

As random as it was i thought maybe it was a problem with the X axis on the one machine, since the X axis is what's shifting on both, but again two machines having the same exact drift in the X Axis on the same part? So i fired up the third printer and it printed a few batches just fine, and then bingo the same X axis drift again. WTH...

So i just selected something else at random from the SD Card and they printed those fine a half dozen times, no problem there, go back to the part i just sliced and failed on the very first try.

No settings have been changed in S3D, nothing has been changed on the printers either. I can go to files i sliced a few days prior and they work fine, but the file i just sliced is not working. I ran it through all the checks and repairs possible and found nothing wrong with the model, and the fact that it prints ok about half of the time is making me think there is something wrong here that i am overlooking, but as to what that may be i am clueless!!!

Any suggestions? The only common denominator is S3D, i tried slicing another part and again tried printing it on all three machines and again i had layer shift. So its not a mechanical issue, its definitely a software issue, just not sure what???
User avatar
dkightley
Posts: 2405
Joined: Tue Mar 10, 2015 4:09 pm

Re: Layer Shifting, Very Odd Issue...

You could just simply be trying to move the head too fast:

https://www.simplify3d.com/support/prin ... salignment
Doug Kightley
Volunteer at the National Tramway Museum http://www.tramway.co.uk
Railway modeller and webmaster at http://www.talkingtgauge.net
kb0nly
Posts: 11
Joined: Wed Jun 24, 2015 9:57 pm

Re: Layer Shifting, Very Odd Issue...

I thought about that to, but its the same settings i have been using for almost a year, the print speed has not changed, but just to rule it out i turned the print speed down to a crawl, and guess what, it still layer shifts!!!

So i installed Makerbot Desktop, ughhhh, and sliced the same model with the same speed settings in that and it printed the first try. So for some reason S3D is shifting the layers off alignment when slicing.
kb0nly
Posts: 11
Joined: Wed Jun 24, 2015 9:57 pm

Re: Layer Shifting, Very Odd Issue...

Nobody knows? Hmmm...

I guess for now i just go back to Makerbot Desktop, though i'm not very happy about it.
horst.w
Posts: 861
Joined: Fri Oct 17, 2014 5:00 pm

Re: Layer Shifting, Very Odd Issue...

I'am sorry, but what do you mean with "Layer Shiftung"? Can you attache some pictures?

When there are differences in the print from SD, I would say it is impossible to make reponsible S3D for this. There is only one file on the card, written by S3D, and different results must have a reason outside S3D, perhaps an issue of the card and / or the readers.

Regards
horst.w, GER

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