One print lost X Y orientation mid print
This happened one time. I printed the same file a few times and only had this happen once.
Anyone else ever seen this?
Please show us a first-layer calibration print on the print-sheet.
Cheerio,
RE: One print lost X Y orientation mid print
I'm a bit confused by this request. This shift was an hour into the print and it was firmly still connected to the sheet. It just started printing with the x & y shifted.
Rick
That wasn't obvious from the picture.
For both axes:
First, with the power off, move the axis by hand; is is smooth? Does the resistance stay the same over the whole range?
Clean and lubricate the smooth rods, check they are not damaged/scratched. Check the idler pulley is not clogged, out of line, or damaged (loosen the belt and try turning it with your fingertip, is it smooth?)
With the belt loose try turning the stepper motor by hand; is it smooth?
Retighten the belt until it just begins to make a low musical note when plucked...
Make your next print this:
https://www.prusaprinters.org/prints/46639-tension-meter-for-the-gt2-belts-of-i3-mk3s-or-prus
It MUST be printed in Prusament PETG or the spring tension will be wrong.
Let us know how you get on.
Cheerio,
RE: One print lost X Y orientation mid print
That wasn't obvious from the picture.
For both axes:
First, with the power off, move the axis by hand; is is smooth? Does the resistance stay the same over the whole range?
Clean and lubricate the smooth rods, check they are not damaged/scratched. Check the idler pulley is not clogged, out of line, or damaged (loosen the belt and try turning it with your fingertip, is it smooth?)
With the belt loose try turning the stepper motor by hand; is it smooth?
Retighten the belt until it just begins to make a low musical note when plucked...
Make your next print this:
https://www.prusaprinters.org/prints/46639-tension-meter-for-the-gt2-belts-of-i3-mk3s-or-prus
It MUST be printed in Prusament PETG or the spring tension will be wrong.
Let us know how you get on.
Cheerio,
Lots of good info there.
I by hand moved both X and Y axis and they are fine. I checked the rods and they were fine and I took the opportunity to lube them. All pulleys seems fine. Belt tensions are x:245 and Y:273. I have no PETG, and have not printed any PETG yet, so I can't do that part.
I didn't loosen the belt and try that step at this time because it has been printing great before and ever since the problem so I'm not inclined to mess with it right now.
This was a new printer as of the first of the year but it has been printing almost daily since then. It was only this one print that went bad and it seemed more like a computer glitch than a mechanical glitch since both the X and Y axis shifted. If it does it again, I'll come back to this and troubleshoot it further. My intent in posting was to see whether this has happened to anyone else.
I actually have a CNC router and it every so often gets out of sync as well but it has been literally about 3 times in 15 years so it has also never been a real issue for me.
Thanks for your help!
Belt tensions are x:245 and Y:273.
The belt tension figure is a measure of the resistance felt by the stepper when moving the axis. On a correctly set up machine this does equate, roughly, to belt tension.
But other things can affect mechanical resistance.
Have you been keeping up with regular maintenance? - monthly is a good idea.
https://help.prusa3d.com/en/article/i3-printers-regular-maintenance_2072
Cheerio,
RE: One print lost X Y orientation mid print
The guide says every couple hundred hours. Turns out I only have 52 hrs so far. Monthly may be overkill for my usage rate. Looks like a comprehensive guide though. Are people actually that diligent, lol?
Are people actually that diligent, lol?
It pays to be.
Cheerio,
RE: One print lost X Y orientation mid print
I'm still not following how a hangup on one axis could cause two axis to shift like that.
It depends how much of a jolt the first belt-tooth misalignment threw through the rest of the printer. Sometimes, not often, the teeth almost align and snap back with a bang.
Cheerio,
RE: One print lost X Y orientation mid print
Interesting. I pulled up the video and I can't really see anything.