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As per the subject, it happens that when using the rollers, the design representing a circular logo is instead engraved with an elliptical shape. 
This does not happen if I use the spindle instead of the rollers. 
 

The design is the same, I just change the mode (rollers or spindle) 

The version used is XCS 1.7.8, but it also happens with the latest beta of XCS 2.0.79.
I don't understand the reason for this happening.
 

Can anyone help me? 
Thank you.
 

Greetings to the community.

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