The provided ER11 collet is for CNC bits whose shank diameter is 3.175 mm only, so if you need CNC bits with the shank diameter other than 3.175mm, you have to change the size of the ER11 collet as well, see changing the collet.
As the length of the bit might be different, when changing the CNC bit installed on the CNC module, you need to update the Z work origin set before as well.
If you use the Bit Assistant to change the CNC bit, the Z-axis work origin will be reset through a few simple steps.
For 4-axis CNC machining, it is highly recommended to use the Bit Assistant to change the CNC bit.
In this case, you need to change the CNC bit first, then to reset the Z-axis work origin manually after changing the bits.
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