Geeetech

Actually the problem is old, but I had bigger problems than this.

The printer is updated with the latest firmware. Used both Cura slicer and the built in slicer for Easy Print.
Same results.

Rectangular objects that where the motors are not moving on both axes are printed approximately ok.

But for example circular objects (see attachment), where the motors movement is combined, aren't round.
Also more complicated objects as benchy are asymmetrically printed with shape problems.

I think you can try to increase the voltage of A4988 and then test it
viewtopic.php?f=19&t=17097

Hi William,

I will try this, I hope it works.
Attached a better screenshot on the issue.
Did someone else got these issues and this voltage increase helped?

Increased the power on both X-Y motors. Still same issue.
It seems it is a firmware bug. The g-codes are badly interpreted by the firmware.

Is there any way to flash a "standard" Marlin FW on this printer like on Geeetech Prusa I3?
I don't mind not using the LCD.
As it is now, with this FW the printer is useless.

Having exactly the same problem. Geeetech sent me a gcode of a 20mm circle.

Buggy Software or cracked mainboard.

Waiting for troubleshooting...

After struggling several days I found the problem.

The reason is backlash.
The fixing on the belt of the Y axis (bellow the bed) had a loose nut/screw and so was not properly fixed.

I removed the loose nut/screw and replaced with something that I've improvised.

The backlash is away. Still getting checksum errors but I least I can use the printer.

These lots it seems have quality issues.

Wow, it seems to be in both axis....I'd try a new mainboard.

Same problem .... the plate in fact seems to do as a "shot" to the right or left when I remove the residues of printing. I will check.

Hello,

I have the same problem can you send me a picture of the nut/screwed that was bad ?