I am sorry for the problem caused.
From the pictures of your testing for the M and the other images, we found that there is a little offset to right side on the X-axis, it should duo to that mechanical structure may not be assembled very properly (the X axis is not totally perpendicular to the Y axis ). Please kindly check the mechanical instruction and adjust it have a try. Here is our learn website providing the FAQs for Laserbot, you may refer to it (You need pull down the page to find the FAQ part).
For the Chinese work on the mLaser software, we will provide an English version mLaser software this week.
For the issue that the engrave result is different with the cutting result. Actually, this is normal.
The underlying algorithms for both engraving and cutting are not the same, so the moving path for the laser are different. Normally cutting can only take the outline, but engrave will engrave on each dot according to the preset rules.
For the last issue that the middle X is very weak, was it possible that the power supply for the Laserbot is not permanently stable during that period. Also, we will test cut the TEXT here have a check.
Btw, may we know the operating system of your Computer?