What is the reason why a circle is not round
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  Laser
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              02-14
            
C
- Miller 02-15- That looks more like mechanical slop than a calibration issue. Go over your belts and pulleys first. Are you using a very high speed? What are your feed rates ? 0Απάντηση-  : Speeds are not typically higher than 500 mm/min. I just touched the belts and to my feel no slack. Linear lines look good. But just did a run now with a corner radius and the tangent line is not perfect (not so bad). I will do another test run with a 50 mm circle now. 
 
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- Abel 02-18- Primary item to check is the set (grub) screws. This link is for Sculpfun machines, but most of the information appliea to all diode lasers. 0Απάντηση-  : Thanks. FYI my 50 mm OD circle measures x = 50.3 mm and y = 49.3 mm. 
-  : Image shows mechanical issue. 
 
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