This needs to be un-flagged as solved since it is still happening after the post 195 for some, and the hunt for the squareness of the carriage is under scrutiny.
Anyhow - this issue will be an ongoing thing for a while. We thought long and hard on the smooth pulley, then someone finally did a test and disproved that one.
Then it was a calibration thing, kind of helped but not a cure
Now, as mentioned above squareness and belt tension is the target.
Someone will get around to a stepper motor change (this printer does not like TL smoothers at all, which should have worked - caused a feedback loop and the carriage sit and vibrate). Wondering if it is running on a PWM.
Changing the steppers to .9 degree will also require some additional start Gcode to set X/Y steps, but as with people trying to ācalibrateā for dimensions, you have no way to know what the current values are. That said, for my Prusa, .9 steppers definitely help with VFAs (hence Prusa switching to them for the MK4.)
Currently for a print going, using PETG. I placed the part at 45 degrees on the bed. The long sides of the print are clearly showing the worst VFAās Iāve seen on my printer. Iām wondering if the orientation means only one stepper is driving the position of the tool head? If my understanding of core XY is correct? Would they explain why Iām seeing the VFAās? The PETG doesnāt help as itās quite shiny
Maybe someone can invent a tool for checking x square to y.
Something that has a little notch for both axis so you dont need have four arms to held a rightangle to the steelrods.
Only thing is that if you print this object on the BL which you suspect not having square X Y axis, the resulting model will also not be really squareā¦
Possibly. But I think it prints upright so would be less prone to that. I am going to print one and check the angle independently. I think it will also work on the X1C, but weāll see.
That does look a lot worse than either of my printers. The only silk I have is a tri-color; I might print a VFA with that to try to accentuate the artifact though it might end up looking a bit strange in other ways. I usually up the print temperature on most PLAs to maintain a shine at high temp, but that depends a lot on brand. My usual stuff I print at 240C, and I suspect you can go higher. I would recommend always printing with the cool plate if possible, since the lower chamber temperature can help reduce the likelihood of heat creep.
I have some horrible ideas that would give a few of the motion control engineers a heart attack, but they may help if youāre primarily targeting low speed prints.
At this point I actually think this might be characteristic of ALL printers. Note that we are NOT talking about z-wobble. paykoman84 / frank.d, that doesnāt look that great but this thread is about waviness in the other direction - VFA / ringing artifacts are waviness back and forth or left and right, not up and down (in XY not in Z). The crazy thing Iām going to tell you is you should try turning down the speed and see if the z-wobbliness goes away (could be due to insufficient cooling)
I printed one too. The fact it tries to clip onto all the rods seems like a design flaw. I was wanting to use it to confirm I was at 90 degrees but the side rod being hidden inside a groove meant I canāt easily see that. Iād rather it just had a flat surface on that side so I can see if the side rod is perfectly parallel.
Clipping onto the carbon rods the way it does also got me worried I might scratch them accidentally. I donāt think it will but given those arenāt sensibly replaceable thatās definitely a concern to me.
Yeah. I suppose they are similar V and current, and the same 1.8 degrees. I have plenty of 0.9 motors I could try but the firmware would need to be updated too or at least the initial gcode
Iāve been running a Duet board on my CR-10S for years so Iām a little rusty on Marlin (especially the newest versions), but isnāt there G-Code commands to set that?
The M92 gcode command sets motor steps, but you donāt know what the current values are and itās unclear whether Bambuās custom firmware even accepts that command.
