adding a fan to the back pointing at the circuit board seems to be doing the trick, i did notice that since I built the acrylic case for my solidoodle the metal frame got very hot so maybe that heat was getting to the circuit board... printed a few long duration parts now without a problem, maybe I will print a proper fan mount for the back for a long term fix as I have just done what Irish said and place a fan on my desk pointing at it. Seems odd that heat to the circuit board could cause such problems.

Just curious what your environment is like where the SD is printing? Is it excessively warm near a heater or near a window where the sun can hit it? it does seem odd that the chips would overheat that easy, I know there are a lot of people running these with covers on them and in warm rooms also the same drivers are in a lot of totally enclosed robots however it would be a little harder to see problems in the bots as they don't leave a physical record like the SD Although I guess there could be just some of those chips that are more sensitive to overheating than others.

adding a fan to the back pointing at the circuit board seems to be doing the trick, i did notice that since I built the acrylic case for my solidoodle the metal frame got very hot so maybe that heat was getting to the circuit board... printed a few long duration parts now without a problem, maybe I will print a proper fan mount for the back for a long term fix as I have just done what Irish said and place a fan on my desk pointing at it. Seems odd that heat to the circuit board could cause such problems.

This is typical of memory chips when they get overheated they tend to get erratic. My SD2 would print great on some items and on others where there was more work I'd get what you saw. It just hit me that maybe the circuit board was too hot and so that proved to be the case. Glad you were able to solve the problem.

SOLIDOODLE should take NOTE of this and add a fan to future units! [grin]

adding a fan to the back pointing at the circuit board seems to be doing the trick, i did notice that since I built the acrylic case for my solidoodle the metal frame got very hot so maybe that heat was getting to the circuit board... printed a few long duration parts now without a problem, maybe I will print a proper fan mount for the back for a long term fix as I have just done what Irish said and place a fan on my desk pointing at it. Seems odd that heat to the circuit board could cause such problems.

Very nice! We're glad you're up and running.

I spoke too soon, still having this problem, I have checked everything that I can think of, I have tightened the belts, loosened the belts, calibrated bed level and extruder. I though it was my wiring bundle hitting the left belt so I sorted that issue but im still having the problem of my parts stretching horizontally (the same as last images) its driving me mad!

I think, after tightening, the belt left and right sides can be fixed asymmetrically relative to each other, and now during movement the print module is jammed.

Here's a photo of what my unit was printing before I cooled the Controller Board on the back of the printer. Looks familar doesn't it?

well i have gone through the calibration process and I am having this problem now
I haven't had much time to test on other models to see if this is consistent or not.
I have also noticed that I have posted this in the wrong place If an admin wishes to move it that's fine.

I don't have my printer yet but by looking at those photos it looks like your y axis (forward/back) one is drifting.  Maybe you didn't tighten a set screw or belt not aligned.

ok I will go through the calibration process again tonight and post back the results. thanks

Results?