RE: HOMING ISSUES
When I do autohome in the menu even when heating to 170C, it homes correctly. It is almost as if the homing through GCODE from the slicer is messed up somehow.
RE: HOMING ISSUES
Is it possible that this depends on the position of the printer bed? I had succsessfull homings when bed is on bottom. Firmware version 6.3.3, Core one conversation kit.
RE: HOMING ISSUES
I went through this issue and I have to say that at the end I solved it repeating well the config of the X Y axis and belt tension.
So disable motors, bring the extruder to the front completely and check if both left and right are exactly touching the frame. If left or right have few mm of gap try to push a little bit to align as much as possible. Then bring the extruder to the back and start increasing belt tension. Keep the belt in which you had the gap a little bit more tight (maybe 3 or 4 Hz more vs the other belt). Now my homing bumbs about 10 times and then start printing with original gcode.
had same issue as described by OP and other people.
I did the CoreXY alignment but still had issues with banging then I tried it carefully again but I changed step 4. a little bit. in stead of loosening belts little by little I loosened them all the way and started to tighten both of them little by little making sure both gantry corners are still touching corexy. when one corner stopped touching I loosened one belt until correct and then continued to tighten them synchronously.
from what I understand is that if you tighten one belt before you tighten the other it can squeeze the gantry and it won't be square anymore.
RE: HOMING ISSUES
This is basically what i did too. I started doing this after i noticed that the "squares" was lost after using a higher belt tension. I think loosening the belts completely and then aligning the gantry is the way, assuming all the gantry construction is solid but only the angle brakets are a bit off.
Then using the multitool key to jam one side ( there is a picture/video somewhere ) and bend on the other. But IMHO bending the angle brakets without a machinists square is suboptimal. Only with a square one can check if the are correct. Just bending for the gap gone can lead to alignment where the gap is gone but the brakets are not at ninety degrees.
I went through this issue and I have to say that at the end I solved it repeating well the config of the X Y axis and belt tension.
So disable motors, bring the extruder to the front completely and check if both left and right are exactly touching the frame. If left or right have few mm of gap try to push a little bit to align as much as possible. Then bring the extruder to the back and start increasing belt tension. Keep the belt in which you had the gap a little bit more tight (maybe 3 or 4 Hz more vs the other belt). Now my homing bumbs about 10 times and then start printing with original gcode.
had same issue as described by OP and other people.
I did the CoreXY alignment but still had issues with banging then I tried it carefully again but I changed step 4. a little bit. in stead of loosening belts little by little I loosened them all the way and started to tighten both of them little by little making sure both gantry corners are still touching corexy. when one corner stopped touching I loosened one belt until correct and then continued to tighten them synchronously.
from what I understand is that if you tighten one belt before you tighten the other it can squeeze the gantry and it won't be square anymore.