Skewed print any suggestions. SOLVED
-
You could look at the gcode and verify that each circle is printed with coordinates that only change in Z, in order to rule out a slicer error. Very odd that it would appear out of nowhere.
-
That's a good idea, I'll do that.
Other things I've tried:
-a selection of cylinders one single walled, one 2mm one 4mm one solid. All the same lean, irrespective of bed position. I tried one with random seams and printed slowly.
-I've checked the mechanicals the pulleys are not loose, the belts are tight, between the towers measured at the top and bottom they are all within 0.1mm - for 1000mm towers.
-The PSU is giving a solid 23.5-24.5v throughout.I am quite puzzled but enjoying trying to work it out.
-
you can also load up Gcode to Gcode.ws to inspect it layer by layer etc
-
Is the height of the cylinder correct, all the way round?
-
I'm going to continue this on reprap http://forums.reprap.org/read.php?178,731246,731513#msg-731513
-
Solved it was the steel reinforced belts losing their reinforcing and stretching.
-
Well, that is a relief!
-
I've not heard that the steel reinforced belts are useful for our machines. Particularly, small bending radii damage the steel belts.
-
Yeah I'd agree and to give DC his due he did question my selection of them when I was putting the machine together. However I'd used them on my corexy for a year or so before they failed, I suppose the section of belt typically spending most time around the pulleys is smaller on the delta, if often printing small object in the bed centre. I suspect with 20t pulleys they would last longer, indeed they do, I had them on my kossel mini which I recently sold for quite a while with no degradation.
-
We have found the GT2 belts that are commonly used (including by us) on deltas from small to ~1.2m large work well. They are fibreglass core AFAIK and have no appreciable stretch. The bend radius has no issues in 20T pulleys that we use.
What I don't know is how well they scale to larger printers where stretch may be more pronounced.
