Seems like I have solved the issue. Previously I was using Marlin 2.0.9.1. Now I have upgraded to Marlin 2.1.2.1 and the issue is gone. Now all prints (with the exception of one) are accurate down to 0.1 mm in Z height. There probably was a bug in the previous version that got trigerred only when certain configuration was enabled, because the printer used to print accurately, but at that point itby MStarha - General
One picture is from the front, the second is a detail on one of the Z lead screws. I always heat the printer up a few minutes before starting a print to let the heat spread. The results are identical to when starting a print right after another has finished without letting the printer cool down. The printing area is 350x350x270, overall size is 610x610x605.by MStarha - General
Yes, I do use PID on bed. I have not noticed any sort of tilting. When printing larger/wider models, the height was equally wrong on all 4 sides. Pictures of the stairs and the tower are attached to this message.by MStarha - General
I just completed two test prints at the ideal 400 steps/mm (ideal for 8 mm/rev screw, 200 steps/rev motor, 16 microstepping). First are "stairs" where there are steps 1 mm tall until 20 mm height. 1 mm, 2 mm, 3 mm are near perfect, then it goes wrong: 3,9 mm, 4,8 mm, 5,7 mm, 6,6 mm, 7,5 mm, 8,4 mm, 9,3 mm, 10,2 mm and the rest until 20 mm stays at about XX,2 - XX,3 mm. The 100 mm tall tower isby MStarha - General
I have dual lead screw moving the bed. Each lead screw has its own motor with its own TMC2208 driver running at 400 mA. The limits are: velocity 30 mm/s, acceleration 200 mm/s2, jerk 0,3 mm/s. I have previously tried increasing the motor current (with the intention of mitigating potential step loss) with no improvement.by MStarha - General
There is a bit of elephant foot as well as the layers being a bit more squished. But I would say nowhere near enough to make a 0,8 mm difference. I will do a few more test prints, though.by MStarha - General
I have built a custom CoreXY printer and I have run into a weird issue. I bought T8x8 lead screws from BIQU and paired them with a 3D printed nuts for the Z axis. Previously, the accuracy was almost perfect, but now I cannot get a consistent Z height. 20 mm cube is 19,2 mm, if I change the steps/mm to compensate, then 100 mm tower is 102,5 mm tall. I have tried flipping the lead screws upside doby MStarha - General
I have a custom CoreXY printer that I am configuring Marlin 2.0.9.1 for. After the bed levelling is done, the probe is stowed correctly, but after that, the toolehad moves to X_MAX_POS, Y_MAX_POS instead of staying at the stow position. The only stow moves are these: #define Z_PROBE_ALLEN_KEY_STOW_1 { X_MAX_POS, 100.0, 20.0 } // Move the probe into position #define Z_PROBE_ALLEN_KEY_STOW_1_Fby MStarha - Firmware - Marlin
Thank you for your answers. I will ask the glazier, how much does the tempered glass warp, and if it is within reason (0.1mm across the whole plate) , I will go with that. Otherwise I wil try the float glass. I am leaving the ceramic glass as the last option because I do not want to waste 45 USD on something that does as good job as a piece of glass for 10-15 USD.by MStarha - General
I am using 300x300 mm Keenovo silicone heater on 5 mm thick 350x350mm cast aluminium plate. And I intend to print PETG and ABS mostly, that means up to 100-120 degrees on the heated bed. That might cause some stress in the glass. Will the ordinary float glass survive? Any thoughts on that? I will ask the glazier about the warping, whether it is something that can be eliminated at this size (whicby MStarha - General
I am building my CoreXY 3D printer with 350x350 mm heated bed at about 4mm thickness. I just found out that borosillicate glass is unavailable at the local glazier. He offered tempered or ceramic glass instead. Which one should I go for? I read that both are a more expensive option to borosilicate glass, but I worry about the temperature stability, warping of the glass (in case of the tempered onby MStarha - General
I have managed to solve the issue of blocked movement outside printing area by adding a default parameter to do_blocking_move_to() function and all underlying functions that allows unreachable movements to happen. The mentioned bed leveling is not fixed. As suggested the issue is most likely in the geometry (wobbly diagonal arms,...). However, I think the effect of it on bed levelling is lesseneby MStarha - Firmware - Marlin
Thank you for your suggestion. Although I think the frame is rigid and accurate enough, I cannot say the same about the diagonal push rods. They use magnetic joints with stell balls glued in place on carriages and on efector. These balls have fallen out many times and were glued back in. Also the holes for these balls are worn out makeing them wobble around the balls. I think that is the issue.by MStarha - Firmware - Marlin
Hello everyone, I have a delta printer running Marlin from about 5 years ago. I decided to configure current version of Marlin 2.0 for this printer. The goal is to mitigate inconsitstent ABL where the middle of printbed is great but to the edge it gets much worse. My problem is that I am using allen key probe so for deploying and stowing I need to go outside the print area and Marlin prevents tby MStarha - Firmware - Marlin