The dimensionality setting on the ULTRA is set by default to give the advantage to small parts.
If this is a problem on large parts, the number of steps per millimeter must be modified in the MENU->CONFIGURATION->MOVEMENTS. Then “Pitch per mm X” or Y as required.
The default values are 644 for X and 645 for Y. If the dimensionality is too large on Y for example, lower the “Pitch per mm Y” value by one or two units, then save via the previous menu and restart the machine.
Repeat the operation until the desired dimensionality is obtained.