Odd circle test results (Page 1 of 24)

Please see this thread. You are not alone.
http://www.soliforum.com/topic/7990/con … ensioning/. I seem to be the only user with this issue that has solved it so far, by upgrading the motherboard.

Do your lights inside the printer dim during prints? Please contribute to the thread I linked to so we can keep this issue all in one place.

I upgraded to an entirely different board. I'm not confident the motherboard is your issue so don't jump the gun.

Read the thread I linked to. It's filled with suggestions about how you can calibrate your printer. Start there. When did you purchase your printer by the way? Just curious.

Nice work! Glad it ended up being that simple for you not all of us were so fortunate. However, do keep us informed on if you remove the last little bit of flatness there.

You might also calibrate your extruder steps per mm and extrusion multiplier. Looks like you might be over-extruding a bit.

this topic dont say what model but the linked one states SD4 so is this only an SD4 issue? as I own one of the first SD2 and dont have near as many issues as the SD4 seems to.

I think by law you can demand a refund. I personally won't be okay even if offered a new motherboard. No guarantee that will be any better and the shipping time outside of US takes forever and I doubt Solidoodle will pay for the customs payments. This is what cipher0 told me anyway.

Anyway, back to topic, nbourg8 please print the test STL Ive uploaded as suggested already and take photo. No side shot please, a top-down shot of the print.

Okay, I'm finally home from doing chores at the in-law's house.  Attached is the circle.stl file printout as per requested.  I still see the problem as well.

Edit: upon inspection after posting the images, they are rotated 90 degrees counter-clockwise.  Please remember to flip them clockwise 90 degrees for orientation purposes with the SD4

I keep meaning to post that same calibration on my printer. Been fighting Y axis shift caused by my janky wiring tangling up. Finally fixed it. Printing some parts for my printer and going to bed but I'll post them tomorrow, just for 100% verification mine are fixed.

I still have Y backlash I can't resolve, but I'm upgrading the bushings and replacing the stock pillow with one using the 6x13x5mm flanged bearings. Hopefully this resolves my backlash but if not, well, time for fishing line after these fixes and a few other things. I'm also looking for a good vendor to replace the Y motor in the back.

Good Luck!  Looking forward to your results.

I believe sparkfun.com has replacement stepper motors almost identical to the steppers of the printer.  Maybe start there.  I've been reading about backlash and even saw your solution of 6x13x5mm flanged bearings.  If this works for you, I'll give it a shot too.

Changed my mind. Here are my circles. I'm having a difficult time telling. What do you folks think?

They look fine to me. Fundamental difference between my printer and yours is the motherboard and power supply.

Hard to tell for me too, but only because its a slightly angled shot, try to shoot a photo facing directly down on the bed.

BTW for both of you layer starts printing on the very left side of the object, for me it starts slightly lower. Whats up with that?

I'd still like you to make a top-don photo of my circles.I've also had others to tell their opinion on how the circles looked and they said it was fine, but you know it wasn't. Its less noticeable on larger circles.
I think this test STL will show the problem more clearly, but if you want to print a nickel, go for it. Will be harder to tell though for me at least.

*and firmware.
We're not being optimistic hoping it's a software issue which is "easier" to fix.
Thing is Solidoodle doesn't just compile the Marlin firmware like we do, I know for a fact that at least they messed with the strings in the code so my printer and jaques's has different printer name.
When you got the Rumba, even if you didn't change the Config.h to make the firmware for the Rumba explicitly, you might still have a slightly different firmware settings than Solidoodle's (ours,because we haven't changed it frm the factory).
I'm sadly too busy these days to actually try it out myself.

There's also the possibility that you adjusted the pulleys and belts better than we did. I think this is unlikely as it doesn't seem to require special skills so some will be better at it than others.But still a possibility nonetheless.
BTW, the thread you linked to seems to be a solution for elongated or squished circles along the Y plane, not "skewed" along the X which is what we are experiencing, right?