A problem appeared that neither felt nor solution. I hope you can help me.
In the attached images you can see in black the distance that I indicate to travel to the x axis and in red what it really travels. It is very rare since I did not have this error.
I am using a 1/8 1 flute bit with a DOC of 3mm and 800mm/min feedrate. Likewise, the lines of the photos were made with a DOC of 1 mm at 1000 mm / min. I generally cut MDF at 1100mm / min with 3mm DOC and all goes well. But notice the mistake when I made a circle and it came out oval.
Im using ramps 1.4.
I made sure that the belts were tight but repeated the mistake.
Something interesting is that the error is repeated. Whenever I indicate 300, walk 308 for example.
Any suggestion would do me good. Thanks from Argentina !