Hi I am pretty new to this community but I thought maybe someone is

3D Printing
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1

Hi I am pretty new to this community but I thought maybe someone is able help me with my frustrating printing issues :stuck_out_tongue: My printer is an “Anycubic K1” Mini Kossel - basically the no-name Delta printer that is sold on ebay for about 200€. I started printing September last year and I only use PLA.
I am trying to print this rather big model which I designed myself for quite some time now, but it has yet always failed to print. First, I had problems with my X-tower-carriage slipping during the print, which resulted in misaligned layers in one direction (Take a look at the picture with the green box).
I tightened my X-belt and then increased my motor current from 0.825A to 1.25A (Ramps1.4 with A4988 drivers) because otherwise it would not home correctly: it would stop and start humming a few centimeters below the endstop.
I thought I had fixed my problems, so I once again started this big print and now look at what happened!
The layers are rotated, but not in sudden jumps, but rather in a smooth path!
I really have no idea what to do now, there is nothing I could do better as it seems:
Heated Bed turns off after the first 5mm,
part cooling fan installed,
additional fan directed onto the the electronics,
great bed adhesion and no warping,
no problems with smaller prints (atleast very rare).
Could it be the driver chips overheating? There wouldn’t be much I could do about that. Or is the PLA lifting up? Change the temperature?

This is getting quite frustrating and although I have been thinking about this and trying out different solutions, there seems to be no way to fix this problem. I hope someone can tell me what I am doing wrong :stuck_out_tongue:

2c0c6eb4d325825241bf8b4363e607d7.jpeg
2c0c6eb4d325825241bf8b4363e607d7.jpeg4000×3000 3.94 MB

63fbba66221078e02f8d9bcb39f13fb5.jpeg
63fbba66221078e02f8d9bcb39f13fb5.jpeg4000×3000 4.08 MB

3acbc87a8e2232ef4bb50b105cf6c057.jpeg
3acbc87a8e2232ef4bb50b105cf6c057.jpeg4000×3000 3.76 MB

716e9cec707fd41dc276fb1ed60d4931.jpeg
716e9cec707fd41dc276fb1ed60d4931.jpeg4000×3000 3.96 MB

e7a2dfebdd309c3c2107002082a125b6.jpeg
e7a2dfebdd309c3c2107002082a125b6.jpeg3000×4000 3.93 MB

2

Check the motor pulley that the grub screw is tighten enough, maybe a drop of thread-locker should help.
When you say not home correctly you mean all 3 towers or just X tower?

3

Thanks, I’ll try that!
Yes all towers of course. It seems that I was able to fix this, but I have not tried printing anything big yet. I think the stepper drivers were overheating and shutting down as I do not have any insulation material between the heated bed and the RAMPS-board (Which is right underneath the bed). I am planning to raise the bed by 20mm with aluminium extrusions and am going to add some insulation, but for now, it seems to be working with a bigger computer fan strapped to one side of the printer which blows air over all the steppers and electronics. I had a fan running at 5V (less noisy and faster heat up) but now it is running at the full 12V. I have put a filter in front of the blades to hold off any dust that would otherwise be blown into the printer.