Odd circle test results (Page 6 of 24)

So did it work? Works for none of us.

Yup. Mine becomes loose as well. Wardjr and I suspect this is due to the twisting motion on the rods. Both the X belt screw and the Teflon block screws loosen. After printing that lawsy carriage I had to tighten up everything. It was a long print, about 6 hours in total for all parts. Any longer and the Teflon blocks might've fallen out

Sounds like you have some mech engineering background is that correct?

And yeah 3d printing is pretty finicky. But you sound like you're up to it! It's worth it when people point at your prints and say "wow, you made that?" Or when people pay you ... I've made some money even without perfect circles.

Sweet stuff! I also have projects awaiting perfect circles. Trying to build a CNC type machine that will give blind folks a tactile sense of a map using a roller ball pen.

But, can't print a good gear without perfect circles!

The only thing that will is a third teflon block or a linear bearing, or some sort of printed part to emulate a teflon block. By the way, even though the lithium grease destroys ABS pretty quickly, I found that I could get the parts I tested to slide fine, so don't worry about causing binding if that's your reason for not trying to print something to test it out. You can't break anything just be gentle with the rods is all. don't scuff them or you'll probably be buying new ones lol

Think you forgot to attach

If thats the carriage from the side, then yes. Thats what I mean and yes, more surface area (for example third teflon) will get rid of it.
And yes jagowilson, thats the reason I was hesitant. Ok then.

BTW, you sure its not nylon?

tightening the 'squeeze' on the blocks will just add drag on right side causing other issues. and Solidoodle dont care about fixing anything on printers they sold/discontinued.

this design is the same since SD2 but when they stretched the same thin frame and rods out for 8x8 since SD3 (which is what SD uses to print those parts BTW) the weakness of design was multiplied. if they would have done the linear bearings instead of friction blocks and bushings dragging, these kind of issues likely never would have been noticed. but hey look who we are talking about. the same folks that brought you "new upgraded' same ol POS hotends from the NOS SD2 parts shelf, for their proud albeit late new arrivals that can only print ABS/PLA in 2 colors.  and by all pics and videos only flat 2D prints it seems.

LMAO did ya see the 12x12 flat pumpkin that likely took hours to make yet Dollar tree sells nicer 3D ones for less than cost of filament. yeah thats what Im waiting 4 months and paying $1500 for so I can stick it to dollar tree by next Halloween.

We have done every possible calibration ourselves, and spent far more than 3 hours on this.
Our circles are not ovals. The artifact is different.

I've attached a sample STL file which takes few seconds to print.
Please print it and post a top down photo of the result like we have.
Eagerly waiting for your results. So far everyone owning a SD4 who I've given this STL to print have noticed this problem.

and if you won't, at least we'll know this isn't a problem with every Solidoodle 4 and with your help we can figure out what the problem is for us by comparing your Solidoodle 4 with ours (design changes, calibration differences, software, etc.)

Go ahead, its public domain stl.

solidoodle just deletes such posts now. on their FB page